Dear Valued Customer,
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ARCCAPTAIN was built by high quality components, every single unit machine was passed
multiple industry leading laboratory tests to provide a great welding experience and
performance.
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product is intact and undamaged. DO NOT return directly before contact our customer
service.
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This manual is designed to help you get the most out of your ARCCAPTAIN products.
Please save this manual and take time to read the safety warnings and precautions,
assembly, operating, inspection, maintenance. They will help you protect yourself against
potential hazards on the worksite. Failure to do so can result in serious injury!
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Save for future reference:
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CONTENTS
1. SAFETY
..........................................................................................................................................................
1
1.1 General Safety........................................................................................................................................... 1
1.2 Electrical Safety......................................................................................................................................... 1
1.3 Fire Safety
...................................................................................................................................................
2
1.4 Fumes and Gases Safety
.........................................................................................................................
2
1.5 Arc Rays and Noice Safety...................................................................................................................... 2
1.6 Gas Shielded Welding – Cylinder Safety...............................................................................................3
1.7 Additional Safety Information
...................................................................................................................
3
2. PRODUCT INTRODUCTION .......................................................................................................3
2.1 Function Overview ....................................................................................................................... 3
2.2 Package .......................................................................................................................................4
2.3 Technical Parameters .................................................................................................................. 4
3. OPERATION CONTROL AND INSTRUCTIONS .......................................................................6
3.1 Panel Instruction .......................................................................................................................... 6
3.2 Multi-function digital operation panel............................................................................................8
3.3 Wire feeding Description ........................................................................................................... 14
3.4 Nameplate..................................................................................................................................14
4. INSTALLATION AND CONNECTION ....................................................................................... 15
4.1 Selecting the Welding Wire ................................................................................. ......................15
4.2 Checking the Torch Accessories ................................................................................................16
4.3 Installing the Welding Wire.................................................................................. ......................17
4.4 Wire Feeding Installation ..................................................................................... ......................18
5. Operation for MIG Welding ......................................................................................................19
5.1 Connection
.......................................................................................................................
......................19
5.2 Input Power Connection................................................................................................ ......................20
5.3 Wire Stick Out................................................................................................................. ......................21
5.4 Operation
.........................................................................................................................
......................22
6. Operation for Spool gun
......................................................................................................................
24
6.1 Set Up Spool gun..................................................................................................................................24
6.2 Connection
.......................................................................................................................
......................26
6.3 Input Power Connection
................................................................................................
......................27
6.4 Wire Stick Out................................................................................................................. ......................27
6.5 Operation................................................................................................................................................28
7. Operation for MIG Flux-Cored Welding
.........................................................................................
30
7.1 Connection.............................................................................................................................................30
7.2 Input Power Connection
................................................................................................
......................30
7.3 Wire Stick Out................................................................................................................. ......................31
7.4 Operation................................................................................................................................................32
8. Operation for MMA/HFTIG/Lift TIG ......................................................................................... 34
8.1 MMA Welder Cable Connection .......................................................................... ......................34
8.2 MMA Welder Operation ....................................................................................... ......................35
8.3 MMA Welding parameters table .......................................................................... ......................36
8.4 HF-TIG/Lift TIG Welder Cable Introduce ............................................................. ......................37
8.5 Tig Welder Operation ...............................................................................................................44
8.6 TIG Welding parameters table ...................................................................................................46
9. Operation for CUT .................................................................................................................. 46
9.1 Installation of the cutting torch ...................................................................................................46
9.2 Installation of the Connection Cable ..........................................................................................47
9.3 Operation method ......................................................................................................................49
9.4 Notes for cutting operation .................................................................................. ......................51
9.5 Cutting parameters table ..................................................................................... ......................52
10. Operation for CLEAN ........................................................................................................... 52
10.1 Clean Welder Cable Connection ........................................................................ .....................52
10.2 Clean Welder Operation............................................................................................................53
11. Engineer Mode ......................................................................................................................55
11.1 Setting of system parameters ............................................................................. .....................55
12. MIG Basic Welding Technique ............................................................................................ 56
12.1 Basic MIG Welding ............................................................................................. .....................56
12.2 Feeding speed .........................................................................................................................58
13. MAINTENANCE ......................................................................................................................... 59
13.1Routine and Periodic Maintenance
.............................................................................
......................59
13.2Daily maintenance......................................................................................................... ......................60
14. TROUBLESHOOTING............................................................................................................................ 61
1
1.SAFETY
! WARINING READ ALL SAFETY WARNINGS BEFORE WORKING!
Failure to follow the warnings and instructions may result in electric shock, fire and/or
serious injury. Save all warnings and instructions for future reference!
If you encounter any issues during installation or operation, refer to the relevant sections in this
manual for inspection. If you're still unsure or unable to resolve the problem, please contact
ARCCAPTAIN professional support.
1.1 General Safety
Do NOT use the welder if the switch does not turn it on and off.
Disconnect the plug from the power source before making any adjustments, changing
accessories, or storing the welder.
Ensure the switch is off before connecting to power or moving the welder to prevent
accidental starting.
Always maintain and use safety guards, covers, and devices properly.
Keep hands, hair, clothing, and tools away from moving parts like V-belts, gears, and
fans.
Follow these instructions and consider working conditions when using the welder and
accessories.
This manual may not cover every possible situation. It's important for the operator to
use common sense and caution while using this product.
1.2 Electrical Safety
! WARINING BEWARE OF ELECTRIC SHOCK!
DO NOT weld in a damp area or come in contact with a moist or wet surface.
DO NOT modify any wiring, ground connections, switches, or fuses in this welding
equipment.
DO NOT come into physical contact with any part of the welding current circuit,
including the workpiece, ground clamp, electrode or welding wire, and metal parts on
the electrode holder or MIG gun.
DO NOT connect the ground clamp to electrical conduit, and DO NOT weld on electrical
conduit.
NEVER leave the Welder unattended while energized. Turn off the power if you have to
leave.
DO NOT attempt to plug the welder into the power source if the ground prong on INPUT
POWER CABLE plug is bent over, broken off, or missing.
DO NOT alter INPUT POWER CABLE or plug in any way.
People with pacemakers should consult their physicians before use. Magnetic field can
make cardiac pacemaker a bit wonky.
! WARINING REPLACING COMPONENTS CAN BE DANGEROUS!
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Only experts should replace machine parts. Avoid dropping foreign objects into the
machine during component replacement. Ensure correct wire connections after
replacing PCBs to prevent property damage.
1.3 Fire Safety
! WARINING BEWARE OF FIRE HAZARD!
Place the machine on non-combustible surfaces to prevent fires.
Ensure no flammable materials are near the working area to reduce fire risk.
Avoid installing the machine near water sources to prevent water damage.
Always weld/cut materials in a dry environment with humidity below 90% and maintain a
working temperature between -10°C and 40°C.
When welding/cutting outdoors, ensure shelter from sunlight and rain, keeping the
machine dry at all times.
Do not operate the machine in dusty or chemically corrosive environments.
Remove or secure all combustible materials within a 35 feet (10 meters) radius of the
work area. Use fire-resistant material to cover or seal open doorways, windows, cracks,
and other openings.
Improper use can lead to fire or explosion. Avoid flammable materials near the working
area, keep a fire extinguisher nearby with trained personnel, refrain from cutting closed
containers, and do not use the machine for pipe thawing.
1.4 Fumes and Gases Safety
! WARINING SMOKE CAN BE HARMFUL TO YOUR HEALTH!
Keep your head away from the smoke while cutting to avoid breathing in harmful gases.
Ensure the working area is well-ventilated with exhaust or ventilation equipment during
cutting.
Only work in a confined area if it's well-ventilated, or wear an air-supplied respirator.
1.5 Arc Rays and Noice Safety
! WARINING
Arc radiation can harm eyes and skin; excessive noise can damage hearing.
Use certified welding eye protection with at least a number 10 shade lens rating.
Wear leather leggings and fire-resistant shoes or boots; avoid clothing that can catch
sparks or molten metal. Do not touch hot workpiece with bare hands.
Keep clothing free of flammable substances and wear dry, insulating gloves and
protective clothing.
Wear an approved head covering and use appropriate welding attire.
When welding overhead or in confined spaces, use flame-resistant ear plugs or ear
EXCESSIVE NOISE DOES GREAT HARM TO HEARING!
ARC RADIATION MAY HURT YOUR EYES AND BURN YOUR SKIN！
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muffs.
Wear ear covers or other hearing protectors when cutting.
1.6 Gas Shielded Welding – Cylinder Safety
! WARINING CYLINDERS CAN EXPLODE WHEN DAMAGED!
Never weld on a pressurized or closed cylinder.
Avoid letting the electrode holder, electrode, welding torch, or welding wire touch the
cylinder.
Keep cylinders away from all electrical circuits, including welding circuits.
Always keep the protective cap on the valve except when the cylinder is in use.
Use only the correct gas shielding equipment designed for your specific type of welding,
and maintain it properly.
Protect gas cylinders from heat, physical damage, slag, flames, sparks, and arcs.
Always follow proper procedures when moving cylinders.
Do not install the machine in an environment with explosive gas to avoid an explosion.
1.7 Additional Safety Information
Use only the supplied power cord for this welder or an identical replacement cord. Do
not install a thinner or longer cord on this Welder.
Maintain labels and nameplates on the Welder. These carry important information.
Ensure the ground clamp is securely connected to the workpiece during welding.
Pressing the gun switch when welding or cutting.
When disposing of the cutting machine, please note the following:
Burning electrolytic capacitors on the main circuit or PCB board may cause explosions.
Burning plastic components such as the front panel may produce toxic gases. Dispose
of it as industrial waste.
2. PRODUCT INSTRUCTION
2.1 Function Overview
This is NEW Pro Serial MIG205 MP, with advanced technology, perfect function and high performance.
This ultra-portable welding system is suitable for various application needs. Additionally, the new Serial
includes the latest remote control via APP.
Multi-functions: Pulse-MIG/MIG/Gasless MIG/MMA/Lift-TIG/HF-TIG/CUT/CLEAN are available.
Synergic MIG: Automatic matching of the voltage & wire feeding speed by adjusting wire
diameter, material，plate thickness and gas.
Separated MIG：Output voltage and wire feed speed adjustment，meet your welding requirement.
Accurate Preset Parameter: 10 groups parameter can be set and storage for each welding mode.
2T/4T: Realize wide application, easy welding and continuous long-term welding.
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Inductance Adjustment: Improve welding performance.
Burn Back Adjustment: softwire could automatically set burn-back time and voltage at MIG.
Hot Start: Make the arc ignition in MMA welding easier and more reliable.
Arc Force: Obviously improve the performance of the machine contribute to long-distance welding.
Anti-stick: Improve welding performance to prevent stickiness.
VRD: Reduce the risk of electric shock to ensure operator’s safety.
Suitable for complex working environment: LED light in the feed wire house, could easily check wire
or roller.
Voice prompt: equipped with voice prompts for polarity wiring, protection, warning, and other
functions for each welding mode
2.2 Package
Name Specification Quantity (pcs)
Welding machine MIG205MP 1
MIG welding torch 9.8ft 1
Torch accessories Conduct tips/Nozzle/Diffuser 4
Ground clamp 9.8ft 1
Electrode holder 9.8ft 1
Lift TIG/HF-TIG gun* 13Ft 1
CUT gun 9.8ft 1
CO2 Gas regulator / 1
Gas hose 9.8ft 1
protection cover For MIG205 MP 1
Adapter 240V to 120V 1
Rollers / 2
Operator’s manual For MIG205 MP 1
CLEAN gun 13Ft 1
*Suit For HF-TIG welding or Lift TIG welding.
2.3 Technical Parameters
Technical Parameter Units
Model
MIG205MP
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Rated input voltage V AC120V±15% 50/60HZ AC240V±15% 50/60HZ
Rated input power KVA 4.9 6.9
Rated input current A 46 35.6
Welding current range (MMA) A
20～140 20～205
Welding current range (TIG) A 20～140 20～205
Welding voltage range (MIG)
A
30～140 30～205
V
11～22 11～26
Welding current range (CUT) 20-40 20-50
Wire feed speed range m/min 1.5～12 1.5～16
Rated duty cycle % 60 60
Open circuit voltage V U
0
: 67 U
r
:11 / CUT（U
0
: 310V）
Overall efficiency % 85
Enclosure class IP 21S
Power factor COSφ 0.72
Insulation class H
Standard IEC60974-1 / EN60974-1 / ANSI/NEMA/IEC 60974-1
Noise db
＜70
Dimension Inch 17.3*12.7*7.9
Weight kg 9.8
Applicable electrode/wire mm
1.6 – 3.2
0.6/0.8/0.9/1.0
Figure 1 Size
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3. OPERATION CONTROL AND INSTRUCTIONS
3.1 Panel Instruction
Part Picture
1. Digital screen display area
2. USB Charging port
3. Left scroll wheel and confirm button
4. HFTIG/Lift TIG/CUT/CLEAN gun switch
socket*
5. MIG wire Spool gun socket/foot pedal
socket*
6. Euro connector for torch
7. Polarity changeover plug
8. "+" output terminal
9. Right scroll wheel and confirm button
10. HFTIG/Lift TIG/CUT gas electric integrated
output interface
11. "-" output terminal
1
2
3
6
4
5
7
10
11
8
9
12. Gas inlet for MIG
13. Power switch
14. Input power cable
15. DC Fan
16. Gas inlet for HFTIG/Lift TIG/CUT
12
13
14
15
16
Figure 2
Figure 3
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17. Spool holder
18. Air Regulator
19. Wire feeding unit
17
18
19
*4. TIG/CUT/CLEAN gun switch socket*
PIN 1: TIG/CUT/CLEAN gun switch signal line 1
PIN 2: TIG/CUT/CLEAN gun switch signal line 2
21
*5. MIG wire Spool gun socket, remote
control/foot pedal socket*
PIN
1: Spool gun power source ”+”
PIN
2: Spool gun power source ”-”
PIN
3: Foot pedal/remote control adjustment
pot
entiometer 3-pin
PIN
4: Foot pedal/remote control adjustment
pot
entiometer 2-pin
PIN
5: Foot pedal/remote control adjustment
pot
entiometer 1-pin
1
2
3
4
5
Figure 4
Figure 5
Figure 6
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3.2 Multi-function Digital Operation Description
Figure7 operation panel
Detailed description for operation panel functions：
Picture Description Item Function
+
Operation mode selection area
operation mode selection button
2T mode
4T mode
Repeat mode
S2T mode
S4T mode
SPOT mode
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+
Pulse function
switch area
DC Output
Pulse output
+
Parameter s
electio
n area
Parameter selection button
Pre-flow time indicator. When the indicator is on, it
indicates the pre-flow protection time.
Initial current indicator. When the indicator is on, it
indicates the initial current.
Up-slope time indicator. When the indicator is on, it
indicates the time when the initial current reaches the
peak current.
Peak current indicator. When the indicator is on, it
indicates the welding current.
Background level indicator. When the indicator is on,
it indicates the background level if there is pulse.
Down-slope time indicator. When the indicator is on, it
indicates the time when the peak current drops to the
crater current.
Crater current indicator. When the indicator is on, it
indicates the current when stopping arc.
Post-flow time indicator. When the indicator is on, it
indicates the delayed air-off time.
Pulse frequency indicator. When the indicator is on, it
indicates the pulse frequency.
Spot welding time indicator. When the indicator is on,
it indicates the spot welding time.
Input voltage
JOB is the saved parameter number
Welding mode
selection area
Welding mode selection button
MIG Mode
SPOOL GUN Mode
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+
HF-TIG Mode
LIFT TIG Mode
Plasma CUT Mode
CLEAN Mode
MMA Mode
+
MIG ma
terial s
election area
Welding wire material selection button
Carbon steel welding wire+80% CO2, 20% AR
（Steel(carbon steel) + Ar80% CO2 20%
+ER50S-6/ER70S-6）
Carbon steel welding wire+100% CO2%
（Steel(carbon steel) + CO2 100%
+ER50S-6/ER70S-6）
Gas free self-protection welding wire
（FCAW+gasless+E71T-GS）
Stainless steel welding wire
（CrNi(stainless steel) + Ar98% CO2 2% + ER308）
Aluminum magnesium welding wire
（AlMg(Aluminum-magnesium alloy) + Ar100% +
ER5356）
Aluminum silicon welding wire
（（AlMg(Aluminum-magnesium alloy) + Ar100% +
ER4043））
+
Diameter selection area
Diameter selection button
welding wire needle diameter
Tungsten Electrode diameter
Welding rod diameter
Diameter value
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Synergic
selection
button
Press the button for “synergic” and “separated” *
Gas
check
Gas check button
Press to turn on gas check, press again within 20
seconds to turn off gas detection; Automatically turn
off gas check after 20 seconds.
Welding machine status
indicat
or icon
When the control panel is not operated for more than
one minute, all button functions on the panel will be
locked and cannot be used. To unlock the button
functions, long press the scroll wheel for 3 seconds
Foot switch
SPOOL GUN remote control
Cooling fan
Voice prompt，How to open and close, please refer to
11.1 Setting of system parameters
When there is a problem with the machine, this
symbol lights up
When the machine experiences overheating
protection, this symbol lights up
When the down arrow lights up, it indicates that the
data is being downloaded, and when the up arrow
lights up, it indicates that the data is being uploaded
The symbol lights up to indicate that Bluetooth is
connected, otherwise Bluetooth is not connected*
W
el
ding machine status indicator icon
When this symbol is on, it indicates that the displayed
value is the latest actual current and voltage
maintained during welding
When this symbol is on, it indicates that the welding
machine is in a high-frequency release state
“synergic” Mode is open
MMA VRD mode is open
Inductance parameter display
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+
Welding parameter adjus
tment
Press the scroll wheel to select welding parameters,
and adjust the welding parameters by rolling the scroll
wheel up and down
MIG Wire feeding speed
MIG Workpiece thickness
Pulse frequency
MIG mode has a fixed pulse frequency and cannot be
adjusted
MMA Hot start time
Value Display
+
Press the scroll wheel to select welding parameters,
and adjust the welding parameters by rolling the scroll
wheel up and down
Welding
parame
ter adjustment
MIG Inductance LED, recommended to be set to 0
MIG Default voltage fine-tuning
Adjust by rolling the scroll wheel up and down
MIG Bum-back time
TIG Pulse width percentage
MMA Hot Start Increased Current Percentage
MMA Arc force Increased current percentage
Value Display
Type-C Mobile phone charging port
* For more detailed information about the connection and operational guidelines for
the ARCCAPTAIN APP, please visit arccaptain.com and explore the resources
available there.
* Parameter group
“PRG”, function of parameter group storage and usage, is in support of ten parameter group
storage“0~9” with one group covering all adjustable parameters on the machine panel, including welding
mode and the related conditions and settings. Prior to any other parameters, the parameter group will
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automatically save the adjusted parameters(save after keeping the same parameters for 20S).The
parameter group keeps the last used parameters when the machine is turned on again.No designated
button for storage and no manual operation for parameter storage and usage.It is easy to use parameter
group. Press the parameter switch button , turn on the parameter group “PRG” LED, and switch
parameter groups by left scroll wheel . Select the parameter group and work with the related parameters,
and the group will automatically save the adjusted parameters.
* MIG welding mode “Synergic” and “separated”
There are two MIG/MAG welding mode, “synergic” and “separated”, for welding specification
adjustment:
Synergic: Current and voltage settings vary with different welding wire, wire diameter and gas; and
also at the same welding current, wire feed speed and synergic voltage may differ; the welder will
auto-match preset current and welding voltage, and users can adjust the inductance to the standard
position according to the process requirements.
In synergic mode, the welder panel will display preset current on the right LED and preset voltage on
the left LED. The synergic parameter database will auto-match the voltage based on the preset current,
with adjustment range of synergic voltage ±3.0V.
This MIG mode is suitable for unskilled welders
Separated: No relation between wire feed speed and voltage adjustment, and users need to set
values separately.
This MIG model is suitable for skilled welders
Attention
Attention! Please select welding functions according to welding requirements.
During welding, choose proper welding process and parameters according to
the technology requirements of workpiece. With improper welding process
and parameters, there will be unstable arc, excessive spatter and wire and
electrode sticking during welding.
Current display shows actual welding current, while voltage display shows actual welding voltage during
welding. Below is display in standby:
Welding process Voltage display Current display
MMA
Open circuit voltage or
VRD voltage（V）
Preset current value（A）
TIG
Open circuit voltage or
VRD voltage（V）
Preset current value（A）
MIG
Preset voltage value（V） Preset wire feed speed（inch/min）
※During MIG welding, actual welding current is displayed when current knob is not rotated, preset wire
feed speed is displayed when current knob is rotated.
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3.3 Wire Feeding Description
Part name Function Picture
1. Feed
Tensioner
Fixed the Idler Arm and adjusts the
pressure on the wire
Figure 8 Inside wire feeder
2.Idler Arm
Press down on the welding wire
3. Wire Inlet
Liner
Guide the welding wire into the wire
feeder
4. Feed Roller
V0.8-0.9 feed roller,Transfer welding
wire
5. Wire Spool
Fixed welding wire spool
3.4 Nameplate
On the machine, there is a plate that includes all the operating specifications for your new unit. The serial
number of the product is also found on this plate.
The duty cycle rating of a welder defines how long the operator can weld and how long the welder must
rest and be cooled. Duty cycle is expressed as a percentage of 10 minutes and represents the maximum
welding time allowed. The balance of the 10-minute cycle is required for cooling.
For example, a welder has a duty cycle rating of 60% at the rated output of 205A. This means with that
machine： you can weld at 205 A output for six (6) minutes out of 10 with the remaining four (4) minutes
required for cooling. The duty cycle of your new welder can be found on the data plate affixed to the
machine. It looks like the diagram below.
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Figure 9 Nameplate
4. INSTALLATION AND CONNECTION
! WARINING BEWARE OF ELECTRIC SHOCK!
Check and follow the instructions listed in the “Safety” section of this manual.
! WARINING DO NOT set up without SWITCH OFF !
4.1 Selecting the Welding Wire
This welder is compatible with 2lb or 10lb spools of 0.023", 0.030", 0.035", or 0.040" MIG
wire. Using thicker wire will not improve welding performance on thicker materials, nor will it
increase deposition rate. Additionally, it may strain your AC power source.
Matching table of relation between welding wire, diameter, shielding gas, material
and wire feeding roll：
In synergic mode, different welding wire, diameter, shielding gas, material and wire feeding roll have
corresponding matching relationship as below table. Please select correct settings to achieve optimal
welding performance.
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Function
Item
Fe CO
2
Fe MIX Flux CrNi AlMg
MATERIAL
STEEL STEEL FLUX CORED STAINLESS ALUMINIUM
WIRE TYPE ER70S-6 ER70S-6 E71T-GS ER308 ER5356
DRIVE ROLLER
V GROOVE V GROOVE KNURLED V GROOVE U GROOVE
POLARITY DCEP DCEP DCEN DCEP DCEP
GAS TYPE
100%CO
2
20%CO
2
+80%Ar NO GAS 2%CO
2
+98%Ar 100%Ar
NOTE: Oxidized welding wire can affect welding results.
If you find rust on a wire spool, it's best to throw it away. But before you do, unwind a bit of
wire to see if the rest is still good. If it's also rusty, get rid of the whole spool.
4.2 Checking the Torch Accessories
! WARINING DO NOT set up without SWITCH OFF !
Before welding, verify that the contact tip size in your MIG torch matches your welding wire
type. Do as following steps.
Description Picture
1. Continuously rotate the nozzle clockwise, as if pulling it
upwards. Since the nozzle is spring-loaded internally, some
force is required to remove it.
NOTICE: ONLY TURN CLOCKWISE.
2.Use a wrench to turn the tip of the contact nozzle
counterclockwise. While doing so, ensure to steady the torch
with one hand. Removing the torch might be difficult if it's not
stabilized.
3.Checking the size number on the contact tip. The original machine is equipped with 0.035” type.
If not confirmed with your welding wire, change it.
4. Replace the nozzle in counterclockwise
Nozzle
Contact
tip
MIG gun
Figure 11
Figure 10
Figure 12
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4.3 Installing the Welding Wire
NOTE: Turn machine power switch to the OFF position before
working inside the wire feed enclosure. Make sure that the wire
feed drive roll and the contact tip of the gun match the diameter
and type of wire used.
NOTE: DO NOT unhook leading end of the wire! It will prevents scattering the entire
coil of wire.
Description Picture
1.Pull up on the Door Latch, then open the Door.
Then you will see Wire Spool and wire feeder.
Figure 13 Door latch
2. Start to install the wire:
Turn counterclockwise to remove the spool knob,
then remove the spring.
Sprin
g
Spool
Plate
Spool
Spindle
Spool
Knob
Wire
Spool
Welder
Wall
Wire must unwind in this direction
Figure 14
3.Remove the spool plate, then spool spindle will be
exposed.
4.Place the wire spool over the spool spindle.
NOTICE:
To prevent wire feed problems, set the leading
end of spool wire towards to wire inlet liner (refer
to the picture), so that it will unwind
counterclockwise.
NOTICE:
To prevent welding wire to unravel and unspool
which can cause tangling and feeding problems,
DO NOT release the wire before spool knob
replace.
5.Replace the spool plate back on the spool spindle.
6.
6.Replace the spring and spool knob over the spool
plate, then turn the spool knob clockwise to tighten.
NOTICE:
If Wire Spool can spin freely, Knot is too loose.
This will cause the welding wire to unravel and
unspool which can cause tangling and feeding
problems.
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Figure 15
Welding
Wire
Wire Inlet
Liner
Hold Wire
Securely
Feed
Guide
4.4 Wire Feeding Installation
! WARINING DO NOT set up without SWITCH OFF !
NOTE: MUST Securely hold onto
the end of the welding wire and keep tension on
it during the following steps. If this is not done,
the welding wire will unravel and unspool which
can cause tangling and feeding problems!
Description Picture
1.Release Feed Tensioner and rotate the Idler Arm away from
the Feed Roller.
NOTICE：
*Feed Tensioner knob could be turn counterclockwise to
loosen it. Then, pull it down to remove tension. The
spring-loaded Idler Arm will move upwards as illustrated.
Feed Tensioner
Idler Arm
Figure 16
2.Feed roller instructions.
Ensure that the visible, stenciled size on the drive roll side facing
you matches the wire size being used.
NOTICE:
*The original machine is equipped with a 0.035in knurled
groove feed roller and a 0.035in flux core wire(ONLY for
Flux cored wire).
*If not match, need to change feed roller:
Unscrew the Feed Roller Knob counterclockwise.
Remove the Feed Roller Knob to access the Feed Roller.
Flip or replace the Feed Roller as necessary. Ensure it
matches the wire type and diameter indicated on the Spool.
Figure 17
3.Carefully detach the end of the wire from the spool. Maintain tension on the wire to prevent the
Feed Roller
Knob
Feed Roller
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19
spool from unwinding.
NOTICE: DO NOT release the wire
4.Trim all bent and crimped wire. Ensure the cut end is smooth without any burrs or sharp edges;
re-cut if necessary.
5.Keep tension on the wire and guide at least 12 inches of wire
through the Wire Inlet Liner, over the Feed Roller, and into the
gun liner.
NOTICE: The spool will rotate in a counter-clockwise
fashion.
Figure 18
6.Close the Idler Arm and turn down the Feed Tensioner until
the idle roller presses down firmly on the wire.
Now you may release the welding wire. Make sure the wire is
positioned in the groove of the lower feed roller.
Figure 19
7.The Feed Tensioner on the Idler Arm adjusts the pressure on the wire .Adjust pressure by
turning the Feed Tensioner to prevent spool overrun, but still allow smooth and easy wire feeding.
Start with the pressure set to an intermediate value. Readjust, if necessary. If the drive roll slips
while feeding wire, the pressure should be increased until the wire feeds properly.
5. Operation for MIG Welding
! WARINING DO NOT set up without SWITCH OFF !
5.1 Connection
Description Picture
1. Connect the ground clamp to “-” negative
polarity
NOTICE:
The ground clamp connector MUST be
tightly connected to the socket to avoid
power short circuit.
Figure 20
2. Connect the welding gun to euro connector
NOTICE:
The MIG gun connector MUST be tightly
connected to the socket to avoid power
Idler Arm
Feed Tensioner
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20
short circuit or air leakage
3. Connect the polarity changeover plug to “+”
Positive polarity
NOTICE:
The polarity changeover plug MUST be tightly
connected to the socket to avoid power short
circuit.
4. With assistance, place an 100% CO2 cylinder
(not included) onto a cabinet or cart near the
Welder and secure the cylinder in place with two
straps (not included) to prevent tipping.
5. Remove the cylinder’s cap. Stand to the side of
the valve opening, then open the valve briefly to
blow dust and dirt from the valve opening. Close
the cylinder valve.
6.
Locate the Regulator and close its valve until it is
loose, then thread Regulator onto cylinder and
wrench-tighten connection.
7. Connector the gas hose to the Regulator’s Outlet
and the welder’s MIG Gas inlet connector.
NOTICE:
The gas hose connector MUST be tightly
connected to the socket to avoid air leakage.
8. The gas hose MUST connect to the MIG gas
inlet connector.
5.2 Input Power Connection
! WARINING BEWARE OF ELECTRIC SHOCK!
NOTICE: The following steps require applying power to the Welder
with the cover open.
To prevent serious injury from fire or electric shock:
1.DO NOT touch anything, especially not the ground clamp, with the
gun or welding wire or an arc will be ignited.
Figure 21
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21
2. DO NOT touch internal Welder Components while it is plugged in.
The MIG205 MP operates with a 120V or 240V power supply. Plug the Power Cord into a
properly grounded. Set MIG Gun down on nonconductive, nonflammable surface away
from any grounded objects. And then turn the Power Switch ON.
NOTE：
For optimal performance, connect the MIG205 MP to a 50A
branch circuit. If connected to a circuit with lower capacity,
expect reduced welding current and duty cycle. The circuit must
be equipped over 50A with delayed action-type circuit breaker or
fuses.
Ensure the mains supply voltage remains within ±15% of the
rated value (120V/240V). Low voltage can lead to subpar
welding results, while excessively high voltage may cause
components to overheat and potentially fail. Check whether the
voltage value varies in acceptable range with a multi-meter.
Code Requirements for Electrical Input Connections
This welding machine must be connected to a power source in accordance with applicable electrical
codes. The National Electrical Code provides standards for amperage handling capability of supply
conductors based on duty cycle of the welding source.
NOTICE: Do not remove the power cord ground prong.
If there is any other question about the installation meeting applicable electrical code requirements,
consult a qualified electrician.
5.3 Wire Stick Out
! WARINING BEWAR E OF EL ECTRIC SHOCK!
Description Picture
1.Set the Mode Switch to MIG setting.
2. Inching
In MIG mode, not during welding, press torch trigger for at least 3S, the welder will go in fast inching
status, closing output port voltage and gas valve. Release torch trigger,the welder will stop inching.
Figure 22
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22
3. Press and hold the gun trigger to load the wire through the gun,
until the wire feeds through the end of the Gun.
NOTE:
Before feeding, Remove the nozzle and contact tip before
feeding the wire to ensure smooth wire feeding.
If the wire does not feed properly and the Spool is stationary, turn
OFF and unplug the Welder and slightly tighten the Feed
Tensioner clockwise before retrying.
If the wire stops instead of bending, disconnect the Welder,
tighten the Feed Tensioner slightly clockwise, and try again. If
the wire bends due to feed pressure, the tension is set correctly.
Point the Gun away from all objects.
The welding wire should match the Feed Roller and contact tips.
4.Turn off the machine after the wire stick out. Then install the
nozzle and contact tip.
NOTE:
Cut the wire 3/8” to 5/8” from the end of the tip.
5.Turn on the machine. The machine is now ready to weld.
6.Close the Door Latch. Make sure. Door is securely latched.
5.4 Operation
! WARINING BEWARE OF ELECTRIC SHOCK!
Turn on the power switch of the machine, and the power indicator illuminates.
Select proper working mode and proper function according your welding situation.
Clamp the Ground clamp onto the workpiece, The Ground clamp must be securely connected to the
workpiece.
Function with synergic Part Select
Select MIG
Open SYN
Select wire
diameter
Figure 23
Contact Tip
Wire
10-16mm
Figure 24
Nozzle
Contact
Tip
MIG
Gun
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23
Select MIG material
according to the workpiece and inlet gas, For
details, see 3.2 Multi-function digital
operation panel
Turn the Left scroll wheel to find the required
current
You can also press the Left scroll wheel and
select the IPM of wire feed speed to
automatically match other parameters
You can also press the Left scroll wheel and
select the thickness of the workpiece to
automatically match other parameters
Select 2T / 4T / Spot
You can also press the right scroll wheel and
select the Select inductance level
You can also choose to use the default Settings
Default voltage fine-tuning
Adjust by rolling the scroll wheel up and down
Function with separated Part Select
Select MIG
Close SYN
/
Turn the knob to find the required voltage
Turn the knob to find the required IPM
Select 2T / 4T / Spot
You can also press the right scroll wheel and
select the Select inductance level
You can also choose to use the default Settings
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24
NOTICE:
•
Always weld clean, dry and well-prepared
material.
• Hold gun at a 45° angle to the workpiece with
nozzle about 1/2” from the surface.
•
Move the gun smoothly and steadily as you
weld.
• On thin gauge material, move quickly and only
weld 1/4” stitch-welds at a time to avoid
melt-through.
•
Avoid welding in very drafty areas. A weak,
pitted and porous weld will result due to drafts
blowing away the
• Keep wire and liner clean. Do not use rusty wire.
•
Sharp bends or kinks in the welding cable should be avoided
• ONLY use MIG solid welding wire.
•
MIG Welding parameters table
（
for reference only
）
6. Operation for Spool gun
! WARINING DO NOT set up without SWITCH OFF !
6.1 Set Up Spool gun
! WARINING BEWAR E OF EL ECTRIC SHOCK!
Figure 25
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25
Description Picture
Pull the Nozzle to remove it. Unscrew the Contact Tip
counterclockwise and remove.
Figure 26
Nozzle
Contact Tip
Open Latch and remove Cover.
note:
To prevent unraveling, leave wire secured to Spool.
Cover
Latch
Figure 27
Loosen Spool Tension Nut.
Install Spool so wire will feed clockwise.
Tighten Spool Tension Nut until Spool cannot spin
freely.
Figure 28
Wire feed cover
Spool Tension Nut
Open Wire Feed Cover.
Pull up on Feed Tensioner, then swing up and over to
expose Idler Arm.
Open Idler Arm to expose wire feed components.
Remove Drive Roller knob. Make sure number on Drive
Roller matches wire diameter. Flip Drive Roller if
necessary.
Figure 29
Drive Roller
Idler Arm
Feed Tensioner
Hold end of wire while releasing from Spool. Cut off any
bent wire.
Keeping tension on Spool, feed Wire through Inlet
Guide and 1/4" into Inlet .
Close Idler Arm and Feed Tensioner.
Replace Spool Cover.
Set Spool Gun down on nonconductive, nonflammable
surface away from any grounded objects.
Figure 30
Inlet
Wire
Inlet Guide
(inside Spool
Holder)
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26
6.2 Connection
Description Picture
1. Connect the ground clamp to “-” negative polarity
NOTICE:
The ground clamp connector MUST be tightly connected
to the socket to avoid power short circuit.
Figure 31
2. Connect the spool gun to euro connector
NOTICE:
The spool gun connector MUST be tightly connected to
the socket to avoid power short circuit or air leakage
3. Connect the polarity changeover plug to “+” Positive
polarity
NOTICE:
The polarity changeover plug MUST be tightly
connected to the socket to avoid power short circuit.
4. Connect the spool gun control line to socket and
tighten it.
1. With assistance, place an 100% argon cylinder (not
included) onto a cabinet or cart near the Welder and
secure the cylinder in place with two straps (not included)
to prevent tipping.
2. Remove the cylinder’s cap. Stand to the side of the
valve opening, then open the valve briefly to blow dust
and dirt from the valve opening. Close the cylinder valve.
3. Locate the Regulator and close its valve until it is loose,
then thread Regulator onto cylinder and wrench-tighten
connection.
5. Connector the gas hose to the Regulator’s Outlet and
the welder’s Gas inlet connector.
NOTICE:
The gas hose connector MUST be tightly connected to
the socket to avoid air leakage.
Figure 32
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6.3 Input Power Connection
! WARINING BEWARE OF ELECTRIC SHOCK!
NOTICE: The following steps require applying power to the Welder
with the cover open.
To prevent serious injury from fire or electric shock:
1.DO NOT touch anything, especially not the ground clamp, with the
gun or welding wire or an arc will be ignited.
2. DO NOT touch internal Welder Components while it is plugged in.
The MIG205 MP operates with a 120V or 240V power supply. Plug the Power Cord into a
properly grounded. Set MIG Gun down on nonconductive, nonflammable surface away
from any grounded objects. And then then turn the Power Switch ON.
NOTE
：
For optimal performance, connect the MIG205 MP to a 50A
branch circuit. If connected to a circuit with lower capacity,
expect reduced welding current and duty cycle. The circuit must
be equipped over 50A with delayed action-type circuit breaker or
fuses.
Ensure the mains supply voltage remains within ±15% of the
rated value (120V/240V). Low voltage can lead to subpar
welding results, while excessively high voltage may cause
components to overheat and potentially fail. Check whether the
voltage value varies in acceptable range with a multi-meter.
Code Requirements for Electrical Input Connections
This welding machine must be connected to a power source in accordance with applicable electrical
codes. The National Electrical Code provides standards for amperage handling capability of supply
conductors based on duty cycle of the welding source.
NOTICE: Do not remove the power cord ground prong.
If there is any other question about the installation meeting applicable electrical code requirements,
consult a qualified electrician.
6.4 Wire Stick Out
! WARINING BEWAR E OF EL ECTRIC SHOCK!
Figure 33
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28
Description Picture
1.Set the Mode Switch to Spool gun MIG setting.
2. Inching
In Spool gun MIG mode, not during welding, press torch trigger for at least 3S, the welder will go
in fast inching status, closing output port voltage and gas valve. Release torch trigger,the welder will
stop inching.
3. Press and hold the gun trigger to load the wire through the gun,
until the wire feeds through the end of the Gun.
NOTE:
Before feeding, Remove the nozzle and contact tip before
feeding the wire to ensure smooth wire feeding.
If the wire does not feed properly and the Spool is stationary,
turn OFF and unplug the Welder and slightly tighten the Feed
Tensioner clockwise before retrying.
If the wire stops instead of bending, disconnect the Welder,
tighten the Feed Tensioner slightly clockwise, and try again. If
the wire bends due to feed pressure, the tension is set
correctly.
Point the Gun away from all objects.
The welding wire should match the Feed Roller and contact
tips.
4.Turn off the machine after the wire stick out. Then install the
nozzle and contact tip.
NOTE:
Cut the wire 3/8” to 5/8” from the end of the tip.
Nozzle
Contact Tip
5.Turn on the machine. The machine is now ready to weld.
6.Close the Door Latch. Make sure. Door is securely latched.
6.5 Operation
! WARINING BEWARE OF ELECTRIC SHOCK!
Turn on the power switch of the machine, and the power indicator illuminates.
Select proper working mode and proper function according your welding situation.
Clamp the Ground clamp onto the workpiece, The Ground clamp must be securely connected to the
workpiece.
Figure 34
Figure 35
Contact Tip
Wire
10-16mm
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29
Function with separated Part Select
Select MIG
Turn the knob to find the required voltage
Turn the knob to find the required IPM
Select 2T / 4T / Spot
You can also press the right scroll wheel and
select the Select inductance level
You can also choose to use the default Settings
NOTICE:
•
Always weld clean, dry and well-prepared
material.
• Hold gun at a 45° angle to the workpiece
with nozzle about 1/2” from the surface.
•
Move the gun smoothly and steadily as you
weld.
• On thin gauge material, move quickly and
only weld 1/4” stitch-welds at a time to avoid
melt-through.
•
Avoid welding in very drafty areas. A weak,
pitted and porous weld will result due to
drafts blowing away the
• Keep wire and liner clean. Do not use rusty wire.
•
Sharp bends or kinks in the welding cable should be avoided
• ONLY use MIG solid welding wire.
•
MIG Welding parameters table
（
for reference only
）
Figure 36
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30
7. Operation for MIG Flux-Cored Welding
! WARINING DO NOT set up without SWITCH OFF !
7.1 Connection
Description Picture
1. Connect the ground clamp to “+” positive
polarity
NOTICE:
The ground clamp connecter MUST be
tightly connected to the socket to avoid
power short circuit.
Figure 37
2. Connect the welding gun to euro connector
NOTICE:
The MIG gun connecter MUST be tightly
connected to the socket to avoid power
short circuit.
3. Connect the polarity changeover plug to “-”
negative polarity
NOTICE:
The polarity changeover plug MUST be
tightly connected to the socket to avoid
power short circuit.
7.2 Input Power Connection
! WARINING BEWARE OF ELECTRIC SHOCK!
NOTICE: The following steps require applying power to the Welder
with the cover open.
To prevent serious injury from fire or electric shock:
1.DO NOT touch anything, especially not the ground clamp, with the
gun or welding wire or an arc will be ignited.
2. DO NOT touch internal Welder Components while it is plugged in.
The MIG205 MP operates with a 120V or 240V power supply. Plug the Power Cord into a
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31
properly grounded. Set MIG Gun down on nonconductive, nonflammable surface away
from any grounded objects. And then then turn the Power Switch ON.
NOTE：
For optimal performance, connect the MIG205 MP to a 50A
branch circuit. If connected to a circuit with lower capacity, expect
reduced welding current and duty cycle. The circuit must be
equipped over 50A with delayed action-type circuit breaker or
fuses.
Ensure the mains supply voltage remains within ±15% of the
rated value. Low voltage can lead to subpar welding results,
while excessively high voltage may cause components to
overheat and potentially fail. Check whether the voltage value
varies in acceptable range with a multi-meter.
Code Requirements for Electrical Input Connections
This welding machine must be connected to a power source in accordance with applicable electrical
codes. The National Electrical Code provides standards for amperage handling capability of supply
conductors based on duty cycle of the welding source.
NOTICE: Do not remove the power cord ground prong.
If there is any other question about the installation meeting applicable electrical code requirements,
consult a qualified electrician.
7.3 Wire Stick Out
! WARIN ING BEWARE OF ELECTRIC SH OCK!
Description Picture
1.Set the Mode Switch to MIG setting.
2. Inching : In MIG mode, not during welding, press torch trigger for at least 3S, the welder will go in
fast inching status, closing output port voltage and gas valve. Release torch trigger,the welder will
stop inching.
Figure 38
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32
3. Press and hold the gun trigger to load the wire through the
gun, until the wire feeds through the end of the Gun.
NOTE:
Before feeding, Remove the nozzle and contact tip before
feeding the wire to ensure smooth wire feeding.
If the wire does not feed properly and the Spool is
stationary, turn OFF and unplug the Welder and slightly
tighten the Feed Tensioner clockwise before retrying.
If the wire stops instead of bending, disconnect the
Welder, tighten the Feed Tensioner slightly clockwise,
and try again. If the wire bends due to feed pressure, the
tension is set correctly.
Point the Gun away from all objects.
Figure 39
4.Turn off the machine after the wire stick out. Then install the
nozzle and contact tip.
NOTE:
Cut the wire 3/8” to 5/8” from the end of the tip.
5.Turn on the machine. The machine is now ready to weld.
6.Close the Door. Make sure. Door is securely latched.
7.4 Operation
! WARINING BEWARE OF ELECTRIC SHOCK!
Turn on the power switch of the machine, and the power indicator illuminates.
Select proper working mode and proper function according your welding situation.
Function with synergic Part Select
Select MIG
Open SYN
Select wire
diameter
/ / /
Contact Tip
Wire
10-16mm
Figure 40
Nozzle
Contact
Tip
MIG
Gun
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33
Select Flux-Cored
Turn the Left scroll wheel to find the required
current
You can also press the Left scroll wheel and
select the IPM of wire feed speed to
automatically match other parameters
You can also press the Left scroll wheel and
select the thickness of the workpiece to
automatically match other parameters
Select 2T / 4T / Spot
You can also press the right scroll wheel and
select the Select inductance level
You can also choose to use the default Settings
Default voltage fine-tuning
Adjust by rolling the scroll wheel up and down
Clamp the Ground clamp onto the workpiece, The Ground clamp must be securely connected to the
workpiece.
NOTICE:
• Always weld clean, dry and well-prepared material.
• Hold gun at a 45° angle to the workpiece with
nozzle about 1/2” from the surface.
• Move the gun smoothly and steadily as you
weld.
• On thin gauge material, move quickly and only
weld 1/4” stitch-welds at a time to avoid
melt-through.
• Avoid welding in very drafty areas. A weak,
pitted and porous weld will result due to drafts
blowing away the
• Keep wire and liner clean. Do not use rusty wire.
• Sharp bends or kinks in the welding cable should be avoided
• ONLY use Flux Cored MIG welding wire.
•
Flux core MIG Welding parameters table
（
for reference only
）
Figure 41
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34
8. Operation for MMA/HF-TIG/Lift TIG
! WARINING DO NOT set up without SWITCH OFF !
8.1 MMA Welder Cable Connection
NOTICE: Before setting up or using this product for new function,
make sure to read the entire Important Safety Information section at
the beginning of this manual!
Description Picture
1. Connect the ground clamp to “-” Negative polarity
NOTE:
The ground clamp connecter MUST be tightly
connected to the socket to avoid power short circuit.
Ensure the ground clamp is connected on clean,
bare metal (not rusty or painted).
2. Connect the Electrode Holder to “+” Positive polarity
NOTE: The Electrode Holder connecter MUST be tightly
connected to the socket to avoid power short circuit.
3. When you use Alkaline rods (E7018), need to DCEP, that
is connect the holder and ground clamp as mentioned above
in above 1. and 2.
If you use Acidic rods(E6013), need to DCEN, that is connect
the holder to “-”and ground clamp to “+” .
NOTE: Incorrect wiring can affect welding results.
Figure 42 DCEP
Figure 43 DCEN
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4. Place the bare metal end of the Stick Electrode (sold
separately) inside the jaws of the Electrode Holder.
NOTE: Set Electrode Holder down on nonconductive,
nonflammable surface away from any grounded
objects.Install Stick Electrode with the machine turned off.
8.2 MMA Welder Operation
! WARINING BEWARE OF ELECTRIC SHOCK!
NOTICE: The following steps require applying power to the Welder
with the cover open.
To prevent serious injury from fire or electric shock:
1.DO NOT touch anything, especially not the ground clamp, with the
gun or welding wire or an arc will be ignited.
2. DO NOT touch internal Welder Components while it is plugged in.
Operation steps
Picture
1.
connect power cord
NOTE: Turn the Power Switch off before connecting Power
Cord. Plug the Power Cord into a properly grounded and
rated receptacle that matches the plug. The circuit must be
equipped with delayed action-type circuit breaker or fuses.
2. Place the bare metal end of the Stick Electrode (sold separately) inside the jaws of the Electrode
Holder.
Figure 44
Figure 45
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36
3. Turn the Power Switch ON.
The Operation interface will light up and the Cooling fan will
rotate.
NOTE:Welder is now energized and open circuit Voltage is
present.
4. Select MMA
5. Stroke the workpiece lightly to ignite the arc.
Tips for igniting the arc:
a. Tap the surface with the Electrode.
b. Stroke the surface with the Electrode.
c. Strike the surface like a match with the Electrode.
6. After the arc ignites:
a. Lift the Electrode off workpiece the same distance as the diameter of the bare metal end.
b. Tilt Electrode back 10 to 20 degrees.
c. Drag Electrode to the back end of the weld puddle to deposit material as needed.
7. The initial settings may need to be adjusted after stopping and carefully inspecting the weld.Proper
welding takes experience.
8. When finished welding; lift the Electrode from the workpiece, then set Electrode Holder down on
nonconductive, nonflammable surface away from any grounded objects.
9. Turn the Power Switch OFF
NOTE:
To prevent accidents, after use:
• Allow Welder to cool down.
• Unplug Welder’s power cord from outlet.
• Remove Ground Clamp.
• Disconnect Electrode Holder and Ground Cables.
10. Clean, then store Welder and its accessories indoors out of children’s reach.
8.3 MMA Welding parameters table
Following table is suitable for mild steel welding. For other materials, consult related
materials and welding process for reference.
Figure 46
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8.4 HF TIG / Lift TIG Welder Cable Introduce
! WARINING BEWARE OF ELECTRIC SHOCK!
NOTICE: The following steps require applying power to the Welder
with the cover open.
To prevent serious injury from fire or electric shock:
1.DO NOT touch anything, especially not the ground clamp, with the
gun or welding wire or an arc will be ignited.
2. DO NOT touch internal Welder Components while it is plugged in.
Description
Picture
1. Connect the ground clamp to “+” Positive polarity
NOTICE:
The ground clamp connecter MUST be tightly
connected to the socket to avoid power short circuit.
Ensure the ground clamp is connected on clean,
bare metal (not rusty or painted).
2. Connect the TIG gun to “-” Negative polarity
NOTICE:
The tig gun connecter MUST be tightly connected to
Figure 47
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38
the socket to avoid power short circuit.
Lift TIG mode of the MIG205MP use with HF TIG GUN
as well as HF TIG mode*
3.
Connect the aviation plug on the TIG torch to the
corresponding socket on the machine panel.
4.
With assistance, place an 100% Argon cylinder (not included)
onto a cabinet or cart near the Welder and secure the cylinder in
place with two straps (not included) to prevent tipping.
5.
Remove the cylinder’s cap. Stand to the side of the valve
opening, then open the valve briefly to blow dust and dirt from
the valve opening. Close the cylinder valve.
6. Locate the Regulator (included) and close its valve until it is
loose, then thread Regulator onto cylinder and wrench-tighten
connection.
7. Connect Shielding Gas Hose on TIG Torch Cable Connector
to the Regulator’s Outlet and wrench-tighten connection.
* Compared to the HF TIG welding mode, the Lift TIG welding mode does not have high-frequency
functionality and can have less impact on electronic products
NOTICE: When in TIG and CUT modes, it is crucial to adjust the air filter in advance.
1.Pull the drain button upward to unlock and adjust the input air pressure.
2.Press the drain button down to lock and prevent misadjustment.
TIG MODE
1.Pull the drain button upward to unlock.
2.Turn the drain button towards the “+”(clockwise direction) to the maximum.
3.Install a TIG gas hose between the gas cylinder regulator and MIG205MP CUT/TIG gas
inlet,then you are ready to TIG weld.
Sharpen tungsten Electrode
Figure 48
Figure 49
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39
WARNING! TO PREVENT SERIOUS INJURY: Some Electrodes may contain materials that are
hazardous to breathe. Wear a respirator and ANSI-approved safety goggles when grinding an
Electrode.
To avoid Electrode contamination, dedicate a fine grit grinding wheel exclusively to Electrode grinding.
1. Shut off the welder and wait until Electrode and Torch have cooled
enough to handle.
2. Remove Back Cap to release Collet’s grip on Electrode.
3. Pull Electrode out from front of Torch. (Pulling it from rear will damage
Collet and create burrs on Electrode).
4. If Electrode has dulled or been otherwise contaminated, use pliers or a
suitable tool to grip the Electrode above the contaminated section and
snap off the end of the Electrode.
5. Lightly press Electrode tip against the surface of the grinding wheel at an
angle. Rotate Electrode tip until a blunt point is formed.
NOTE: Grinding direction must be parallel to length of Electrode.
6. The conical portion of the ideal tip will be 2-1/2 times as long as the
Electrode diameter.
7. Re-insert Electrode into Collet with tip protruding 1/8"-1/4" beyond the
Ceramic Nozzle, then re-tighten the Back Cap to secure the Electrode in
place.
Assemble tig torch
1. Consult Settings Chart, on top of Welder, to determine
proper Tungsten Electrode size to be used with thickness
of material to be welded.
2. Match Collet and Collet Body sizes to Tungsten
Electrode size.
3. Thread Collet Body into the front of the Torch.
4. Make sure Ceramic Nozzle size is appropriate for
application.
5. Thread Ceramic Nozzle onto Collet Body.
6. Insert Collet into back of Torch and into Collet Body.
7. Insert Tungsten Electrode into Collet on front of Torch.
8. Lock Electrode in place with Back Cap. Electrode
should protrude 1/8" to 1/4" beyond the Ceramic Nozzle.
NOTE: The tig torch and tungsten electrode are not included in the machine. If you need to
purchase, please log in to the official website: WWW.ARCCAPTAIN.COM
Welding method description
Legend for commonly-used torch trigger operations
↓ Press the torch trigger ↑ Release the torch trigger
Mode
No.
Operation Schedule
Torch trigger operation and typical DC TIG
current curve
Figure 50
Figure 51
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1
Spot welding mode:
1. Press the torch trigger to start the
arc to the set value;
2. The arc extinguishes after the spot
welding finishes running for the set
time.
2
S2T mode:
1. Press the torch trigger to increase
the arc up to the designated peak
current
2. Release the trigger to slowly
extinguish the arc
3. If the trigger is pressed again
before the arc is extinguished, it will
slowly increase to the peak current
3
S4T mode:
1. Press the torch trigger to start the
arc to the initial value
2. Release the trigger to slowly
increase to the peak current
3. Press the trigger to slowly drop to
the finish current
4. Release the trigger to extinguish
the arc
4
RPT(repeat) mode:
1. Press the torch trigger to start the
arc to the initial value
2. Release the trigger to slowly
increase to the peak current
3. Press the trigger to slowly drop to
the finish current
4. Release the trigger to slowly step
up to the peak current
5. Repeat steps 3 and 4 until the arc is
extinguished by pressing the torch
trigger twice within 300ms.
5
2T mode:
1. Press the torch trigger to welding
with the designated peak current
2. Release the trigger to extinguish
the arc
Press the torch
trigger
Arc starting time
Figure 52
Figure 53
Figure 54
Figure 55
Figure 56
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6
4T mode:
1. Press the torch trigger to start the
arc to the initial value
2. Release the trigger to increase to
the peak current
3. Press the trigger to drop to the
finish current
4. Release the trigger to extinguish
the arc
Set DC TIG welding parameters
The HF-TIG/ Lift Tig welding parameters are as shown in Figure 58.
Figure 58 Current waveform of DC TIG
TIG welding parameters MIG205MP Current
t0-Pre-flow time /
t1-Initial current period I1-Initial current
t2-Up-slope time I2-Current during up-slope time
t3-Peak current period I3-Peak current
t4-Down-slope time I4-Current during down-slope
time
t5-Finish current period I5-Finish current
t6-Post-flow time /
● Initial current (I1): The initial current is the current after the torch trigger is pressed to start the arc,
which should be determined according to the process requirements. A large initial current makes it easy
to start the arc, but it should not be too large when welding thin plates, otherwise, it may burn through the
Figure 57
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workpiece. After the arc is started in 4T operation, the current remains at the initial current to achieve the
purpose of preheating the workpiece or lighting.
● Up-slope time (t2): Refers to the time as the current slowly rises from the initial current to the peak
current, which can be determined according to the usage and process requirements.
● Peak current (I3): Set by the user according to the actual process requirements.
● Down-slope time (t4): Down-slope time refers to the as when the current drops from the peak to the
finish current, which can be determined according to the usage and process requirements.
● Finish current (I5): In 4T operation mode, the arc is not extinguished after the current down-slope and
remains in a state of continuous arcing, which can avoid weld defects or large craters caused by
immediately cutting off the output. The operating current in this state is called the finish current, which
should be determined according to the process requirements.
● Pre-flow time (t0): Refers to the time from pressing the torch trigger to sending argon gas to arc
starting. Generally, it should be greater than 0.5s to ensure that the gas has been sent to the welding
torch at normal flow when discharging arc initiation. It should be increased when the gas pipe is long.
● Post-flow time (t6): Refers to time from cutting off the welding current to turning off gas the valve in the
welder. It should be determined according to the usage conditions and process requirements; too long
will cause waste of argon gas, but too short will cause oxidation of the weld.
The parameters are set as follows:
Enter DC TIG mode, and press the encoder to select the welding parameter to be set. If the parameter
indicator is on, it indicates that the parameter is selected.
Press the encoder once. If the indicator is on, it indicates that the parameter has been selected for
configuration; rotate it clockwise to increase the value, and counterclockwise to decrease the value.
After setting the parameter, press the encoder again to save the current settings, and the parameter
indicator will change to always on.
Set all the welding parameters according to the above steps.
Set Pulse TIG welding parameters
The DC pulse TIG welding parameters are as shown in Figure 59.
Figure 59 Current waveform of DC pulse TIG
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TIG welding parameters MIG205MP parameter Current
t0-Pre-flow time /
t1-Initial current period I1-Initial current
t2-Up-slope time I2-Current during up-slope time
t3-Peak current period I3-Peak current
t4-Down-slope time I4-Current during down-slope
time
t5-Finish current period I5-Finish current
t6-Post-flow time /
tb-Pulse base time Ib-Pulse base current
tp-Pulse peak time Ip-Pulse peak current
T-Pulse period /
Pulse TIG includes all DC TIG parameters, except that the parameters are set differently. The
parameters will not be explained again here. In addition, there are 4 adjustable parameters, which are
explained separately in conjunction with the figure:
● Peak current (Ip): Maximum pulse current, adjusted according to the process requirements.
● Base current (Ib): Minimum pulse current, adjusted according to the process requirements.
● Pulse frequency (1/T): T=tp+tb, adjusted according to the process requirements.
● Duty cycle (100%*tp/T): the percentage of peak current duration in the pulse cycle, adjusted according
to the process requirements.
The parameters are set as follows:
Enter DC TIG mode, and press the encoder to select the welding parameters to be set. If the parameter
indicator is on, it indicates that the parameter is selected.
Press the encoder once. If the indicator is on, it indicates that the parameter has been selected; press
the encoder clockwise to increase the value, and counterclockwise to decrease it.
After setting the parameter, press the encoder again to save the current settings, and the parameter
indicator will change to always on.
Set all welding parameters according to the above steps.
NOTE：Open the gas valve on the gas cylinder, adjust the argon gas flow, and realize TIG welding by lift
arc starting or HF arc starting.
During welding:
1) The TIG parameter indicator changes with the welding state
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2) If the parameter indicator is in initial current, peak current, or finish current, directly press the
encoder to adjust the value, and the parameter indicator will flash
3) If the parameter indicator is in pre-flow time, up-slope time or down-slope time, the value cannot be
adjusted, and operations on the encoder will not be effective.
After welding, release the torch trigger to extinguish the arc.
Note! When starting the arc, if the short-circuit time exceeds 2 seconds, the welder turns off the
output current. Lift the welding torch to restart the arc again.
Note! During welding, if there is short circuit between tungsten electrode and the workpiece, the
welder will immediately reduce the output current; if the short circuit exceeds 1 second, the
welder will turn off the output current. If this happens, lift the welding torch to restart the arc
again.
8.5 Tig Welder Operation
! WARINING BEWARE OF ELECTRIC SHOCK!
NOTICE: The following steps require applying power to the Welder
with the cover open.
To prevent serious injury from fire or electric shock:
1.DO NOT touch anything, especially not the ground clamp, with the
gun or welding wire or an arc will be ignited.
2. DO NOT touch internal Welder Components while it is plugged in.
Operation steps
1. Open gas cylinder’s valve all the way.
NOTE: TO PREVENT DEATH FROM ASPHYXIATION:
Do not open gas without proper ventilation. Fix gas leaks immediately. Shielding gas can displace
air and cause rapid loss of consciousness and death. Shielding gas without carbon dioxide can be
even more hazardous because asphyxiation can start without feeling shortness of breath.
2.
Set Flow Gauge to SCFH value
3. connect power cord
NOTE: Turn the Power Switch off before connecting Power
Cord. Plug the Power Cord into a properly grounded and rated
receptacle that matches the plug. The circuit must be equipped
with delayed action-type circuit breaker or fuses.
Figure 60
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4. Turn the Power Switch ON.
NOTE: Set TIG Torch down on nonconductive, nonflammable
surface away from any grounded objects.
The Operation interface will light up and the Cooling fan will rotate.
5. Select Lift TIG or HF- TIG
NOTE:
Welder is now energized and open circuit Voltage is
present.
6. Hold TIG Torch in one hand and the TIG Rod (sold separately) in other hand. Both hands need to wear
protective gloves.
WARNING! TO PREVENT SERIOUS INJURY: Metalwork bench must be grounded when TIG
welding.
NOTE: Maintain a constant distance between the Tungsten Electrode and the workpiece: between
1 and 1.5 times the diameter of the Electrode.
7. The initial settings may need to be adjusted after stopping and carefully inspecting the weld. Please refer
to 8.7 TIG Welding parameters table，Proper welding takes experience.
8. Hold TlG Torch in one hand and the TlG Rod (sold separately) in other hand. Both hands need towear
protective gloves.
Lift TIG: To initiate welding arc, touch Electrode to work piece and Press the torch trigger, then lift
HF-TIG: Place the electrode at a certain distance from the workpiece and Press the torch trigger
WARNING! TO PREVENT SERIOUS INJURY: Metalwork bench must be grounded when TIG welding.
NOTE: Maintain a constant distance between the Tungsten Electrode and the workpiece: between 1and 1.5
times the diameter of the Electrode.
9. When welding puddle is hot enough, tilt Torch backward about 10-15 degrees from vertical and
move it back slightly. Add TIG Rod material as needed to the front end of the weld puddle.
10. Alternate between pushing the torch/weld puddle and adding the TIG Rod material.
NOTE: Remove the TIG Rod each time the Electrode is advanced, but do not remove it from the gas shield.
This prevents oxidation from contaminating the weld.
11. When finished welding, c
lose the torch trigger
, then let the gas coverage until weld solidifies.
12. Set TIG Torch down on nonconductive, nonflammable surface away from any grounded objects.
13. Turn the Power Switch OFF.
14. To prevent accidents, after use:
• Allow Welder to cool down.
• Unplug Welder’s power cord from outlet.
• Remove Ground Clamp from workpiece or table.
Figure 61
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• Disconnect TIG Torch and Ground Cables.
• Close gas cylinder’s valve securely, remove regulator and replace cap.
• Disconnect Gas Hose from Welder.
• Store and secure gas cylinder.
• Clean, then store Welder and its accessories indoors out of children’s reach.
8.6 TIG Welding parameters table
Following table is suitable for stainless steel welding. For other materials, consult
related materials and welding process for reference.
9. Operation for CUT
! WARINING BEWARE OF ELECTRIC SHOCK!
Check and follow the instructions listed in the “Safety” section of this manual.
! WARINING DO NOT set up without SWITCH OFF !
9.1 Installation of the cutting torch
Check the torch for proper assembly. Install proper torch parts for the desired application (Refer to the
following Torch head figure).
NOTE: The power supply will NOT operate unless the torch shield cup is fully seated against the Parts in
Place pins in the torch head.
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1. Insert one end of the electrode into the torch head.
2. Connect the tip to the electrode.
3. Connect the nozzle with the tip, screw it into the
torch head. And tighten it.
Figure 62 cutting torch head
9.2 Installation of the Connection Cable
!
WARINING DO NOT set up without SWITCH OFF !
Description
Picture
1. Connect the Cutting gun to TIG/CUT gas
electric integrated output interface
NOTICE:
The Cutting gun connector MUST be tightly
connected to the socket to avoid power short
circuit.
Figure 63 Connection of cutting torch
2.
Connect the aviation plug on the cut torch to the
corresponding socket on the machine panel.
3. Connection of earth cable
Insert the quick plug on the earth cable into the
terminal and tighten it clockwise.
NOTICE:
The ground clamp connector MUST be tightly
connected to the socket to avoid power short
circuit.
Ensure the ground clamp is connected on
clean, bare metal (not rusty or painted).
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2.Connection of air compressor
The MIG205MP requires compressed air to be
attached to the unit. Use a hose clamp to tighten
the gas hose to avoid air leakage
NOTICE:
The input air pressure mini-mum must be 72.5
PSl, 5 Bar and must not exceed150 PSl, 10.3
Bar. An air regulator is included with the unit with
optimum pressure setting set to 57.5 PSl, 4 Bar.
The unit is also equipped with an air filter which
captures water and oil vapor. The vapor collected
can be drained out of the bottom of the unit by
turning the drain button.
Figure 64 Connection of air compressor
3.Connection of input power
The MIG205MP operates in 240V or 120V power supply. Plug the Power Cord into a properly
grounded. Set Cutting Gun down on nonconductive, nonflammable surface away from any grounded
objects. And then then turn the Power Switch ON. The fan should start. The Digital screen should turn
on.
NOTICE:
Adjust the Voltage Switch to match the outlet voltage:
For 120VAC, attach the provided adapter to the Power Cord.
For 240VAC, do not use the adapter.
Plug the Power Cord into a properly grounded and rated receptacle matching the plug and selected
voltage.
Need to be connected to circuits with 50A and above circuit breakers
NOTICE: When in TIG and CUT modes, it is crucial to adjust the air filter in advance.
1.Pull the drain button upward to unlock and adjust the input air pressure.
2.Press the drain button down to lock and prevent misadjustment.
CUT MODE
Figure 6
1.Pull the drain button upward to unlock.
2.Turn the drain button towards “-”(clockwise direction) to the minimum.
3.Connect the air hose between the air compressor MIG205MP CUT/TIG gas inlet,then you
are ready to CUT.When starting cutting, slowly turn the drain button towards”+” (clockwise
direction) to the needed air pressure.
5
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NOTICE: The nominal air pressure setting is 58 PSI(4.0 Bar).The regulator should
never be set above 87 PSI(6 Bar).
9.3 Operation method
! WARINING BEWARE OF ELECTRIC SHOCK!
Description Picture
1. Clamp the Ground clamp onto the
workpiece, The Ground clamp must be
securely connected to the workpiece.
Figure 66 Clamp the Ground clamp
2. Set the output current control knob at maximum position for higher cutting speed and less dross
formation. Reduce the current, if desired to reduce the cut width, heat affected zone or travel speed
as required.
3. 2T/4T mode select
2T (2 touch) mode:
Press the trigger to start the cutting current
Release trigger to stop the cutting current.
4T (4 touch) mode:
Press trigger to start cutting
Release trigger during cutting.
Press and release trigger to shut cutting current off.
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4. Bring the copper nozzle of the
cutting torch into contact with the
workpiece , and then push the torch trigger.
After the arc is ignited and started, raise the
cutting torch to the position about 0.04inch
above the workpiece, and start cutting.
5. Pierce the work piece by slowly lowering
the torch onto the metal at a 30° angle away
from the operator. This will blow the dross
away from the torch nozzle. Slowly rotate
the torch to vertical position as the arc
becomes deeper.
NOTE: Graphics shown are for
understanding torch angles for best results
– the distances from the workpiece are
exaggerated. In actual operation, the nozzle
should be held just above the work piece
surface.
Figure 67 Cutting operation
NOTE
For better torch control, it is acceptable to let the nozzle drag along the work piece surface. This will
shorten nozzle life. Also, it is acceptable to place a non-conductive torch guide on the work piece in order
to achieve a cleaner cut
• When the trigger is released, the arc will stop. The gas will continue to flow for 5 seconds of postflow. If
the trigger is activated within this time period
• If the dross is difficult to remove, reduce the cutting speed. High speed dross is more difficult to remove
than low speed dross.
• The right side of the cut is more square than the left as viewed along the direction of travel.
• Clean spatter and scale from the nozzle frequently.
Parts in place
If the accessories of cutting torch need to be replaced, please log in to the official website:
WWW.ARCCAPTAIN.COM
• Check the assembly of the torch consumables. If they are not properly in place, the machine will not
start. Make sure that the shield cup is hand tight. Do not use pliers or over tighten.
• Check the conditions of the inside of the nozzle. If debris has collected, rub the electrode on the
inside bottom of the nozzle to remove any oxide layer that may have built up. Refer to the “Routine
Maintenance Section".
• Check the condition of the electrode. If the end has a crater-like appearance, replace it along with the
nozzle. The maximum wear depth of the electrode is approximately .062”. A green and erratic arc will
indicate definite electrode failure and the electrode should be replaced immediately.
• Replace the nozzle when the orifice exit is eroded away or oval shaped.
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9.4 Notes for cutting operation
! WARINING BEWARE OF ELECTRIC SHOCK!
It is recommended to initiate the cutting from the edge of workpiece, unless
penetration is needed.
Ensure spatters fly from the bottom of workpiece while cutting. If spatters fly from
the top of workpiece, it indicates that the workpiece can not be fully cut because
the cutting torch is moved too fast or the cutting current is too low.
Keep the nozzle slightly touching the workpiece or keep a short distance between
the nozzle and workpiece. If the torch is pressed against the workpiece, the
nozzle may stick to the workpiece, and smooth cutting is unavailable.
For cutting round workpiece or to meet precise cutting requirement, molding
board or other assistant tools are needed.
It is recommended to pull the cutting torch while cutting.
Keep the nozzle of cutting torch upright over the workpiece, and check if the arc is
moving with the cutting line. If the space is not enough, don’t bend the cable too
much, step on or press upon the cable to avoid suffocating of gas flow. The
cutting torch may be burned because the gas flow is too small. Keep the cutting
cable away from edge tools.
Clean up the spatters on the nozzle timely, for it will affect the cooling effect of the
nozzle. Clean up the dust and spatters on the torch head after using everyday to
ensure good cooling effect.
The workpiece is not cut fully. This may be caused by:
1. The cutting current is too low.
2. The cutting speed is too high.
3. The electrode and nozzle of the torch are burned.
4. The workpiece is too thick.
Molten slag drops from the bottom of workpiece. This may be caused by:
1. The cutting speed is too low.
2. The electrode and nozzle of the torch are burned.
3. The cutting current is too high.
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9.5 Cutting parameters table
! WARINING BEWARE OF ELECTRIC SHOCK!
Select proper current according to the cutting parameters table, workpiece material,
cutting thickness and cutting speed, etc. (The figure in the below table is an approximation.)
Figure 18 Cutting speed (in/min) when cutting current is 50A
10. Operation for CLEAN
! WARINING DO NOT set up without SWITCH OFF !
10.1 Clean Welder Cable Connection
NOTICE: Before setting up or using this product for new function,
make sure to read the entire Important Safety Information section at
the beginning of this manual!
Description Picture
4. Connect the Clean gun to “-” Negative polarity
NOTE:
The ground clamp connecter MUST be tightly
connected to the socket to avoid power short circuit.
Ensure the ground clamp is connected on clean, bare
metal (not rusty or painted).
5. Connect the ground clamp to “+” Positive polarity
NOTE: The Electrode Holder connecter MUST be tightly
connected to the socket to avoid power short circuit.
Figure 68
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10.2 Clean Welder Operation
! WARINING BEWARE OF ELECTRIC SHOCK!
NOTICE: The following steps require applying power to the Welder
with the cover open.
To prevent serious injury from fire or electric shock:
1.DO NOT touch anything, especially not the ground clamp, with the
gun or welding wire or an arc will be ignited.
2. DO NOT touch internal Welder Components while it is plugged in.
Operation steps
Picture
1. connect power cord
NOTE:
Turn the Power Switch off before connecting Power
Cord. Plug the Power Cord into a properly grounded and rated
receptacle that matches the plug. The circuit must be equipped
with delayed action-type circuit breaker or fuses.
2. Connect the ground clamp to the workpiece，Prepare the workpiece to be cleaned. Make sure the
area is clean and the floor is dry.
3.
Turn the Power Switch ON.
The Operation interface will light up and the Cooling fan will rotate.
NOTE:Welder is now energized and open circuit Voltage is
present.
4. Select CLEAN
5. With the brush secure into the the end of the wand, dip the brush into the container with weld cleaning
solution.
Make contact with the brush to the welded area to be cleaned.
As the chemical reaction happens keep the brush moving back and forth over the weld until desired
results are achieved. Do not dwell in one spot more than a few seconds. lf the brush starts to burn or is
leaving black marks on your part use more weld cleaning solution.
Note ： weld cleaning solution needs to be purchased separately, MIG205MP is not provided
solution
Figure 70
Figure 69
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6. As the solution in the brush dissapates, re-dip the brush into the solution to keep the brush saturated
in solution
7. Removal of Weld cleaning solution and metal residues
Electrochemical cleaning leaves electrolyte and metal residues on the workpiece surface. Such residues may
cause deposits on the workpiece and affect corrosion resistance.
After weld cleaning is complete, Rinse or wipe off excess solution off the workpiece.
Spray on neutralizer everywhere the solution contacted.o Rinsing off with clean running water is also
acceptable.
Wipe off neutralizer with a separate rag or rinse with clean water
Neutralizer wipes can be used in place of the neutralizer spray.
Note：During electrochemical cleaning ensure that no cleaning electrolyte enters into any workpiece
cavities or seams.Inmost cases complete removal of solution residue from cavities,overlaps or seams
can be difficult.
8. Turn the Power Switch OFF
NOTE:
To prevent accidents, after use:
• Allow Welder to cool down.
• Unplug Welder’s power cord from outlet.
• Remove Ground Clamp.
• Disconnect Electrode Holder and Ground Cables.
9. Clean, then store Welder and its accessories indoors out of children’s reach.
Note
：
Proper brush usage can improve brush life and cleaning efficiency. Do not use excessive
downward pressure on the brush. The Capital Weld Cleaner uses an electro-chemical process,
and is not an abrasive process. Pushing down too hard will splay the fibers and cause them to
not clean as effectively and can shorten the life of the brush. The electro-chemical process will
allow more electrical current to flow through the ends of the fibers than it will if you are cleaning
against the sides of the fibers. When trimming the silicone sleeving do not expose more than ½"
of carbon fiber, allowing the silicone sleeving to keep the fibers tighter together making it easier
to clean at the ends of the fibers.
Fi
g
ure 71
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11. Engineer Mode
! WARINING BEWARE OF ELECTRIC SHOCK!
11.1 Setting of system parameters
A default set of common welding parameters for this machine can be revised by revising system
parameters in case of need. Below is method:
NOTE:
The default parameters of the welder are modified for experienced welders.
The default parameters of the welder have been set in the best state. Do not change the
default parameters of the welder unless necessary.
NO operation Picture
1
1. Turn on the power switch of the welding machine, and when the
display screen is fully lit, touch the "Operation Mode" button with
your finger once. After the header displays "dbg"+"bcs", touch the
"Operation Mode" button again. When the LED displays "P01", you
can enter the background parameter setting interface;
2
Select system parameters of TIG or MMA by pressing Welding
process selection button.
3
3. Rotate the "left scroll wheel" to select the parameter items to be
modified, rotate the "right scroll wheel" to modify the parameters of
the selected items, and touch the "operation mode" button once to
save after modifying the parameters;
4
After revising parameters, press Synergic selection button
button to exit the setting of system parameters to be in normal
standby.
System parameter:
MMA mode
No. Function parameters Default
Setting
range
Unit Description
P01
Background parameters
initialization
on on/off -
Restore factory default
(Select “on” to restore factory default)
P02 Welding time calculation 0.0 0.0～999 day Calculate welding time
P03 VRD switch at MMA off on/off -
VRD switch at MMA
（ “off”: VRD is off, “on”：VRD is on）
P04 Arc-force current at MMA 50 20～80 A
Given current value when output voltage
is below 14V at MMA
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P05 Arc ignition current at MMA 60 20～100 A
Given current value of arc ignition at
MMA
P06 Arc ignition time at MMA 0.4 0.3～1.0 S
Duration for given current value of arc
ignition at MMA
P07 Voice prompt on on/off - Voice prompt switch
TIG mode(HFTIG and LIFT TIG)
No. Function parameters Default
Setting
range
Unit Description
P01
Background parameters
initialization
on on/off -
Restore factory default
(Select “on” to restore factory default)
P02 Welding time calculation 0.0 0.0
～
999 day Calculate welding time
P03 Lift TIG current 50 35～65 A
Current value when tungsten and
workpiece are shorted at Lift TIG
P04 Post-flow time at TIG 5.0 1.0-10.0 S Post-flow time at TIG
12. MIG Basic Welding Technique
! WARINING BEWARE OF ELECTRIC SHOCK!
NOTICE: The following steps require applying power to the Welder
with the cover open.
To prevent serious injury from fire or electric shock:
1.DO NOT touch anything, especially not the ground clamp, with the
gun or welding wire or an arc will be ignited.
2. DO NOT touch internal Welder Components while it is plugged in.
12.1 Basic MIG Welding
Good weld quality and profile depend on factors like gun angle, travel direction, electrode extension
(stick out), feeding speed, base metal thickness, wire feed speed (amperage), and arc voltage. Here are
some basic guidelines to help with your setup:
Gun Position and Travel Direction
Gun position refers to how the wire is directed at the base metal, including the angle and travel direction
chosen. Feeding speed and work angle affect the weld bead profile and penetration depth.
Push Technique
In the push technique, the wire is positioned at the leading edge of the weld pool and pushed towards
the unmelted work surface. This technique offers a clear view of the weld joint and wire direction. It
directs heat away from the weld puddle, allowing for faster feeding speeds, resulting in a flatter weld
profile with light penetration. It's suitable for welding thin materials, producing wider and flatter welds with
minimal cleanup or grinding required.
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Perpendicular Technique
In the perpendicular technique, the wire is fed directly into the weld. This method is primarily used in
automated situations or when necessary. It typically results in a higher weld profile and deeper
penetration.
Drag Technique
With the drag technique, the gun and wire are pulled away from the weld bead. The arc and heat focus
on the weld pool, resulting in more heat on the base metal, deeper melting, increased penetration, and a
higher weld profile with more buildup.
Travel Angel
Travel angle is the right to left angle relative to the direction of welding. A travel angle of 5°- 15° is ideal
and produces a good level of control over the weld pool. A travel angle greater that 20° will give an
unstable arc condition with poor weld metal transfer, less penetration, high levels of spatter, poor gas
shield and poor quality finished weld.
poor control,unstable arc,less
penetration,lots of spatter
less control over the weld pool
more spatter
good level of control over the
weld pool, even flat weld
A
ngle more than 20°
Not enough angle
Angle 5°-15°
Figure 72
Wire
p
ointed back into bead
Figure 73
Wire
p
ointed ahead of bead
Travel Direction
Travel Direction
Travel Direction
Drag Technique
Gun Perpendicular
Push Technique
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Unstable arc, spatter, poor
penetration and fusion
Unstable arc, spatter, over
heat contact tip
Even arc, good penetration
even fusion, good finish
Too longToo short
Normal stick out
5-10m
m
Fi
g
ure 75
Angle to Work
The work angle is the forward back angle of the gun relative to the work piece.The correct work angle
provides good bead shape, prevents undercut, uneven penetration, poor gas shield and poor quality
finished weld.
Stick Out
Stick out is the length of the unmelted wire protruding from the end of the contact tip. A constant even
stick out of 0.2-0.4in will produce a stable arc, and an even current flow providing good penetration and
even fusion. Too short stick out will cause an unstable weld pool, produce spatter and over heat the
contact tip. Too long stick out will cause an unstable arc, lack of penetration, lack of fusion and increase
spatter.
12.2 Feeding Speed
Feeding speed refers to how quickly the gun is moved along the weld joint, measured in inches per
minute. It can vary based on conditions and the welder's skill, limited by their ability to control the weld
pool. The push technique allows for faster feeding speeds compared to the drag technique. Gas flow
should match the feeding speed, increasing with faster feeding and decreasing with slower speed.
Feeding speed should match the amperage and decreases as material thickness and amperage
increase.
Too Fast Feeding Speed
Too fast feeding speed results in insufficient heat per inch of travel, leading to less penetration and
reduced weld fusion. The weld bead solidifies quickly, trapping gases inside and causing porosity.
Undercutting of the base metal may occur, leaving an unfilled groove in the base metal.
poor control, unstable arc,less
penetration, lots of spatter
less control over the weld pool
more spatter
good level of control over the
w
eld pool, even flat weld
Too much angle
Not enough angle
Correct angle
Figure 74
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Too Slow Feeding Speed
Too slow feeding speed produces a wide weld with inadequate penetration and fusion. The arc energy
remains on top of the weld pool, resulting in excessive weld metal deposition per inch and poor-quality
weld deposits.
Correct Feeding Speed
The correct feeding speed maintains the arc at the leading edge of the weld pool, allowing sufficient
melting of the base metal for good penetration, fusion, and wetting out of the weld pool. This produces a
high-quality weld deposit.
13. MAINTENANCE
! WARINING BEWARE OF ELECTRIC SHOCK!
NOTICE: To prevent serious injury, fire, and burns:
Unplug the welder.
Place the MIG gun on a heat-proof, electrically non-conductive
surface.
Allow all parts of the welder to cool completely before servicing.
13.1 Routine and Periodic Maintenance
• Before Each Use -Check over machine and accessories for any obvious condition that may prevent
safe performance or operation, repair or replace items as necessary to correct any abnormal
condition.
• loose hardware
• misalignment or binding of moving parts
• damaged cord / electrical wiring
• frayed or damaged cables
• cracked or broken parts
• any other condition that may affect its safe operation.
• Store in a clean and dry location.
• For optimal weld quality, clean and inspect the contact tip and nozzle before each use.
Cleaning Tip and Nozzle- With the power switch OFF, keep the contact tip and nozzle clean to
prevent issues like shorted nozzles, poor welds, and overheating of the gun.
NOTE:
Make sure that the entire Mig gun is completely cool and that the power cord is unplugged from the
electrical outlet before proceeding.
Torch accessories are consumables, ARCCAPTAIN provided more for your replacement.
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13.2 Daily maintenance
The power of the switching box and the welding machine should be shut down before daily checking
(except appearance checking without contacting the conductive body) to avoid personal injury accidents
such as electric shock and burns.
Daily checking is very important in keeping the high performance and safe operation of this welding
machine.
Do daily checking according to the table below, and clean or replace components when necessary.
In order to ensure the high performance of the machine, please choose components provided by
ARCCAPTAIN when replacing components.
Daily checking of the welding machine
Items Checking requirements Remarks
Front panel
Whether any of the components are damaged or
loosely connected;
Whether the output quick sockets are tightened;
Whether the abnormity indicator illuminates.
If unqualified, check the
interior of the machine,
and tighten or replace the
components.
Back panel
Whether the input power cable and buckle are in
good condition;
Whether the air intake is unobstructed.
Cover Whether the bolts are loosely connected.
If unqualified, tighten or
replace the components.
Chassis Whether the screws are loosely connected.
Routine
Whether the machine enclosure has color fading or
overheating problems;
Whether the fan sounds normal when the machine is
running;
Whether there is abnormal smell, abnormal vibration
or noise when the machine is running.
If abnormal, check the
interior of the machine.
Cleaning the
Feed Rolls
Clean the grooves in the drive rolls frequently. This can be done by using a small
wire brush. Also wipe off, or clean the grooves on the upper feed roll. After
cleaning, tighten the feed roll retaining knobs.
Daily checking of the cables
Items Checking requirements Remarks
Earth
cable
Whether the grounding wires (including workpiece
Earth wire and welding machine earth wire) break off.
If unqualified, tighten or
replace the components.
Welding
cable\
MIG gun
Whether the insulating layer of the cable is worn, or the
conductive part of the cable is exposed;
Whether the cable is drawn by an external force;
Whether the cable connected to the workpiece is well
connected.
Use appropriate methods
according to the work site
situation to ensure safety
and normal cutting.
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14. TROUBLESHOOTING
! WARINING DO NOT set up without SWITCH OFF !
This Troubleshooting Guide is provided to help you locate and repair possible machine
malfunctions. Simply follow the three step procedure listed below.
Locate Problem(Symptom)
Look under the column labeled “PROBLEM(SYMPTOMS)”. This column describes possible symptoms
that the machine may exhibit. Find the listing that best describes the symptom that the machine is
exhibiting.
Possible Cause
The second column labeled “POSSIBLE CAUSE” lists the obvious external possibilities that may
contribute to the machine symptom.
Recommended Course of Action
This column provides a course of action for the Possible Cause, generally it states to contact you local
after-sales service center.
Problem (symptoms)
Possible areas of
mis-adjustment
Recommended course of
action
Bead is too
thick(intermittently)
Feeding speed is slow and/or
inconsistent
Increase and maintain a
constant feeding speed.
Output heat range is too high. Set the knob to low
Bead does not penetrate
base metal.
Feeding speed is inconsistent. Decrease and maintain a
constant feeding speed.
Output heat range is too low. Set the knob to high
NOTICE: For safety and to maintain warranty validity:
Only qualified authorized personnel should perform service and repairs!
Unauthorized repairs may endanger the technician and machine operator!
To prevent electrical shock, follow all safety precautions in this manual!
Use only original spare parts when replacing components!
When ordering spare parts, provide machine type, serial number, and item
number, along with type designation and item number of the spare parts!
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Wire sputters and sticks to
workpiece
The wire is damp. Change to dry wire. Be sure wire
is stored in a dry location
Wire feed speed is too fast. Reduce wire feed speed.
Edge of weld has ragged
depressions
Feeding speed is too fast. Reduce feeding speed.
Wire feed speed is too fast. Reduce wire feed speed.
Output heat range is too high Set the knob to low
There is no current after
turning on the machine.
The power cord is not well
connected.
Reconnect the power cord.
The welding machine fails. Ask professionals to check.
The fan does not work
during welding.
The power cord for the fan is not
well connected.
Reconnect the power cord for
the fan.
Auxiliary power fails. Ask professionals to check.
The overheating indicator is
on.
The overheating protection circuit
works.
It can be recovered after the
machine cools down.
There is no response when
pushing the torch trigger
and the alarm indicator
does not illuminate.
The torch trigger fails. Repair or replace the welding
torch.
When the torch trigger is
pushed, there is gas output,
but there is no output
current, and the alarm
indicator does not
illuminate.
The earth cable is not well
connected with the workpiece.
Reconnect it.
The torch trigger fails. Repair or replace the welding
torch.
There is output current
when pushing the torch
trigger to feed gas, but the
wire feeder does not work.
The wire feeder is clogged. Unclog it.
The wire feeder fails. Repair it.
The control PCB or wire feeding
power PCB inside the machine
fails.
Replace it.
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The welding current is
unstable.
The pressure arm on the wire
feeder is not properly adjusted.
Adjust it to get proper pressure.
The drive roll does not match the
wire size being used.
Make sure they match with each
other.
The contact tip of the welding torch
is badly worn.
Replace it.
The wire-feeding tube of the
welding torch is badly worn.
Replace it.
The electrode is of poor quality. Use electrode of good quality.
Common Failure Analysis and Troubleshooting:
Common failure and troubleshooting
Failure Cause Solution
Turn on the
machine, there is
no current
● Power is not well connected
● Welder fails
● Reconnect power
● Ask professional personnel for help
Fan does not work
during welding
●Fan power cord is not well
connected
● Auxiliary power supply fails
● Reconnect fan power cord
● Ask professional personnel for help
Display “Err10”
● Over-current protection for
welder
● Restart the welder, if problem cannot be solved,
contact maintenance personnel
Display “Err14”
●Short-circuit current
protection
● Restart the welder, if problem cannot be solved,
contact maintenance personnel
Display “Err15” ● Power limitation protection
● Restart the welder, if problem cannot be solved,
contact maintenance personnel
Display “Err60” ● Overheat protection ● It gets to normal after cooling the welder
Display “Err34”
● 15V undervoltage
protection
●15V undervoltage protection
GMAW (MIG/MAG) failure and troubleshooting
Failure Cause Solution
There are no
response and error
code after pressing
torch trigger
● Torch is not well connected to
wire feeder
● Torch trigger fails
● Reconnect torch and wire feeder
● Repair or replace the torch
There are gas output
and wire feeding after
pressing torch trigger
but no current output
and error code
● Ground wire is not well
connected to workpiece
● Wire feeding unit or torch fails
● Reconnect ground wire and workpiece
● Repair the wire feeding unit or torch
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There are gas supply
and current output but
no wire feeding after
pressing torch trigger
●Wire feeding unit is stuck
●Wire feeder fails
●Control board in the welder fails
● Unblock the wire feeding unit
● Repair the wire feeder
● Ask professional personnel for help
Welding current is
instable
●Unsuitable moment adjustment
for wire feeder
● Wire feed rolls do not match
welding wire
● Contact tip is worn severely
● Wire liner of torch is worn
severely
●Welding wire is of poor quality
● Readjust moment of wire feeder
● Select suitable wire feed rolls and
welding wire
● Replace the contact tip of torch
● Replace the wire liner
● Replace wire with one of better quality
If you do not understand or are unable to perform the Recommended Course of Action
safely, contact arccaptain.com for after-sale service.
Save for future reference:
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