User Manual
[MD-400D 3D Printer]
Shenzhen MINGDA Technology Co.,Ltd
V2.0
*Please read this guide carefully before using this printer
Thank you for choosing MINGDA Technology's products!
For the best experience, please read this user manual carefully and follow the instructions to operate the
printer. If you encounter any issues with the printer, please contact us using the contact information provided at
the end of this user manual. Our team is always ready to provide you with high-quality service.
To enhance your usage of our product, you can also learn how to use the printer through the following means:
1. User Manual: Relevant instructions and videos can be found on the included USB drive.
2. You can also visit our official website (www.3dmingda.com) for information on software, hardware, contact
details, device instructions, device specifications, and warranty information, among other things.
1. Please do not place the printer in environments with significant vibrations or instability, as machine
shaking can affect the print quality.
2. Avoid touching the nozzle and heated bed while the printer is in operation to prevent potential burns from
high temperatures, resulting in personal injury.
3. Refrain from moving the device during the printing process to prevent accidents and injuries.
4. Do not dismantle the equipment or alter circuit settings without authorization.
5. Avoid using the device in high-temperature or humid environments to prevent compromising device
performance or creating safety hazards.
6. In case of an emergency, immediately cease using the device and power it off.
Cautionary Notes
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Contents
Cautionary Notes ……………………………………………………………………………………………...…............................................
1 Overview …………………………………………………………………………………………………………………..........
2 Device Introduction ……………………………………………………………………………….............................
Device Parameters ……………………………………………………………………………………………...…..........................................
Packing List ……………………………………………………………………………………………………………............................................
Machine Components Overview ....…………………………………………………………………..................……............................
3 Operating Instructions ……………………………………………………………………………...........................
Parts assembly .......……………………………………………………………………………………………..................................................
Install the warning light ………………………………………………………………………………................................................
Install the Antenna ……………………………………………………………………………….....……............................................
Power on ………………………………………………………………………………..............……..................................................
Power off ………………………………………………………………………………..............……..................................................
Startup Configuration ………………………………………………………………………………………..................................................
Printer Calibration …………………………………………………………………...........………...…....................................................
Z Calibrate ………………………………………….……………………………….....……....................................……………………..
Auto Bed Leveling ………………………………………………………………..............……....................................................
XY Offset Calibration ……………………………….………………....................................................................................
Z Height Diff Calibration …………………………………………………….....……..............................................................
Input Shaper …………………………………………………………………….....……...............................................................
Calibrate PID …………………………………………………………………….....……................................................................
4 Operating interface introduction ………………………………………………………..................................
5 Load filament .….........…………………………………….………......…..........……….....………....…......….....
6 Printing .........…………………..……....………......…........………......…........………...………......……......….
7 Resume Printing ........……………………............……....………......…........………......…........………........
8 Slicing Software Installation and Usage …....………......…........………......…..................……….....
Installation …………………………………………………………………................................................................................
Configuration ……………………………………………………………………………….....……..................................................
Usage ……………………………………………………………………..............…….................................................................
Printing …………………………………….…………......…...............................................................................................
Copy gcode from USB to printer………………………………………............................................................................
LAN Printing ……………………………………………………………………………….....…….....................................................
Print Mode ………………………………….……………………….…………......…...........................................................................
Copy Mode ………………………………………………………………….................................................................................
Mirror Mode ……………………………………………………………………………….....…….....................................................
Print Two Colors ……………………………………………………………………..............…….................................................
Printing Support ……………………………………………………………………..............…….................................................
9 Maintenance and Care …...…...…...……...……...……...…...…...…...…..……...…...…..…...…...............
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1. Overview
This manual provides instructions on the usage of the 3D printer, covering aspects such as an overall introduction
to the device, operational procedures, maintenance, and care. The aim of this manual is to assist you in correctly using
and maintaining the 3D printer, ensuring device performance and safety, extending the lifespan of the equipment, and
enhancing print quality. We hope that you follow the requirements and recommendations outlined in this manual
during usage, and maintain attention to and care for the equipment. Thank you for choosing our product, and we wish
you a pleasant experience!
2. Device Introduction
Device Parameters
Basic Parameters
Product Model MD-400D
Machine Dimensions 690*790*910mm
Max. Build Dimensions 400*400*400mm
Duplicate Mode 400(2*200)*400*400 mm
Mirror Mode 320(2*160)*400*400 mm
Print Technology Fused Deposition Modeling (FDM)
Rated Voltage 100-240V, 50/60Hz
Rated Power 800W
Ambient temperature
10℃-30℃ / 50°F-86°F
Extruders Two
Max. Nozzle Temperature 350℃
Max. Bed Temperature 110℃
Screen 7inch touch screen
Printing Method USB Flash Disk / LAN Printing
Connection USB Flash Disk / WIFI / Ethernet
Power Loss Recovery Yes
Filament Detection Yes
Fast Auto leveling Yes
Camera Yes
Fast Calibrate Offset Yes
Supported Filament
Common filament:
PLA, TPU, PETG;
Engineering filament:
PET-CF/GF, HtPA-CF/GF,
ABS-GF25/CF20, HtPA-GF25/CF25;
Support filament:
S-Mulit, S-HtPA, PVA, etc
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Packing List
Tool List
Note: The 400D is equipped with a hardened steel nozzle. If you frequently print
high-temperature materials, long-term printing will cause wear to the nozzle. We
recommend replacing the nozzle every 500 printing hours.
U-disk Allen wrench
Warning lights Antenna
Power cable
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Machine Components Overview
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3. Operational Steps
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Parts assembly
1. Install the indicator light
Rubber
Ring
Nut
2. Install the Antenna
Green light: Indicates that the printer is working properly.
Red light: Indicates that the printer is in an emergency stop or fault state, requiring immediate
attention or repair by the user. For example, overload, short circuit, or error message on the screen.
Yellow light: Indicates that the printer is in a warning or abnormal state, requiring user attention or
intervention. For example, insufficient filament or paused printing.
3. Power on
Insert a power socket, Press the switch
Press the power to turn on the printer
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4. Power off
When you turn off the printer, please don't press the power directly!
Click "Shutdown" to turn off the printer
Click the "Shutdown"
Please make sure the voltage is correct before plugging in.
Startup Configuration
1. Select Language
Click to choose the language,
and click to proceed to the
next step.
2. Wi-Fi
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Note: If printer can’t detect your WiFi, you can click to skip this step. After finishing the startup
wizard, move the printer to a position which have stronger WiFi signal, connect it again.
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Enter the WiFi password and click
Select the WiFi and click
(If your WiFi cannot be displayed for more than
20s, please click to refresh)
Upon successful connection, click the in the
upper right corner to enter the main interface of the
machine. If you do not need to connect to the network,
you can also click the to skip this step.
Once the connection is successful, click
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1. Z Calibrate
Click "Z Calibrate"
Click "Start" , the XYZ axises will move
automatically
Put an A4 paper between the nozzle and
heated bed.
While moving the A4 paper back and forth,
adjust and . When you feel slight
resistance as the paper moves, you can click
the to save.
Click to save the value,
the printer will reboot automatically.
Click to start auto-leveling,
which will take approximately 3 minutes
2. Auto Bed Leveling
Click "Leveling"
Printer Calibration
Tip: Please follow the sequence shown in the diagram to calibrate step by step.
Z Calibrate → Leveling → XY Offset → Z Height Diff → Input Shaper
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3. XY Offset Calibration
Click "XY Offset"
Adjust the left extruder nozzle to align with the
crosshairs of the screen and click "Confirm
Pos" Then the right nozzle will move
upon the camera automatically.
After the camera Led light up, Click "Start" , and
the left extruder will move to the calibration
camera's position.
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Adjust the right extruder nozzle to align
with the crosshairs of the screen click
" " and click " " And the
printer will reboot.
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Tips: Wipe the nozzle clean before calibration to avoid any interference during the process.
The camera was coverd with the PEI,
remove the PEI at first.
Pull the PEl sheet out until the camera and probe are
exposed. then hang the PEl on the metal bracket.
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Click “Start” to start Z offset automatically.
If the printer hasn't homed before, it will home itself
first. After that, click “Start” again to begin
calibration.
After finishing, click “Save” and restart the
machine.
4. Z Height Diff Calibration
While calibrating the Z-axis offset, the extruder
will move towards the sensor automatically.
Please observe if the nozzle is positioned above
the probe sensor. If not, use the Adjust Zprobe
Pos function to adjust the nozzle.
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( Put the PEI sheet back to the heated bed. )
Click "Z Height Diff"
Click “Start” and move the XYZ axis to position the nozzle directly above the
center of the metal sensor. Then “Save” the value. After that, perform the “Z
Height Diff” procedure again.
Adjust Zprobe Pos
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2. Leveling: Before starting the leveling process, heat the bed to 60℃
and wait for 20 minutes. This allows for thermal expansion of the glass to
stabilize, ensuring accurate leveling.
Note：
1. Z-calibrate, Auto-leveling, XY offset and Z height diff must be
performed after replacing the nozzle, hotend, or removing/reinstalling the
extruder.
3. Bed Leveling Frequency:
It is recommended to perform bed leveling every 20–25 print jobs. The Frequent
removal and repositioning of the glass bed can gradually lead to positional
deviation. Timely leveling ensures consistent print quality.
4. How to Determine if Leveling is Needed during printing:
Carefully observe the first layer when starting a new print. If there is a large gap
between the filament and the heated bed, poor adhesion, warping, curling, or
uneven extrusion (e.g., some areas too thick, others too thin, or broken lines), it
indicates that bed leveling is required.
5. Clibrate PID
Before using the machine for the first time, it is essential to perform temperature
calibration.
The nozzle's compensation values must be adjusted according to different ambient
temperatures. Proper calibration ensures accurate and stable temperature control
during printing, thereby improving print quality.
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Click “Preheat”
Click the temperature value
Set at ”220°C“
Click ”Accept“
Click “Save”
6. Calibrate PID
5. Input Shaper
Click "Input Shaper" Click "Auto-calibrate"，After calibration is
complete, click the save button.
Primary interface Explain
Temperature
Temperature display area
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IP
Network IP address.
Move
Adjust the value of the XYZ axis.
Preheat
Pre
-set nozzle & hotbed’s temperature.
Extrude
To unload or load filament.
Calibrate
Printer Calibration
Settings
Printer’s printing value adjustment.
Print
Start printing.
Shutdown
Shutdown interface.
Homepage
Return to the main page.
Return
Return to the previous page.
Main interface
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4. Operating interface introduction
Calibrate:
Secondary interface Explain
Z Calibrate
Calibrate Z offset
Leveling
Auto
-leveling
XY Offset
Calibrate XY axis
Z Height Diff
Calibrate Z axis
Input Shaper
Test the resonance compensation value.
Adjust Zprobe Pos
Adjust Zprobe Pos
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Settings:
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Secondary interface Explain
Network
To connect Wi
-Fi
Fan
Cooling fan adjustment
Leds
Turn on/off Light
System
Machine shutdown, restart, reset function
Update
Update Klipper and Klipperscreen
Manual
Manual
Troubleshooting
Troubleshooting
Power Loss Recovery
Resume the print after a power failure or system error
Force move
Move the toolhead if necessary before resuming the print
More
Includes some basic settings such as time, language,
screen timeout, notification sound toggle, and automatic
shutdown after printing completion.
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Secondary interface Explain
Cancel
Stop printing
Pause
Pause printing
Fine Tuning
Adjust Z
-offset, Printing Speed, Printing Flow
[
Please refer to Figure 1.]
Settings
Basic setting, browse camera, adjust cooling fan, light and
Exclude object
. [Please refer to Figure 2.]
Stop
Emergency stop .
Printing Interface:
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Figure 2
Figure 1
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5. Load filament
2. Remove the PTFE tube from the toolhead and manually feed the filament
into the toolhead until it stops.
1. Place the filament on the holder and insert it into the PTFE tube. Continue
pushing until it cannot go any further. (Make sure the filament is inserted in the
correct direction.)
The filament in the right cabinet is routed to the left extruder, and the
filament in the left cabinet is routed to the right extruder.
3. Feed out the filament
4. When the filament feeding is finished, insert the tube into the toolhead
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Click Extruder “T0” , select Distance
“100mm” and Speed”5”, click Load 2-3
times till the filament goes out of the nozzle.
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Click the "Extrude"
Enter the filament recommand temperature
value, click then click
Click the temperature setting
Follow the same steps, you can install the filament into the right extruder.
Test Printing
Before printing your won model, please test the gcode which shipped from the printer first
Click “Print”
Click Print icon
6. Printing
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Observe the first layer during printing
Click Fine-tuning
Select the distance at 0.02 and
increase the Z-offset until the
line is smooth
The final result after adjusting
Printing Tips:
During printing, if the model is too close to or too far from the build plate, you can
use the fine-tuning function to adjust the nozzle height:
1. Tap "Fine Tune".
2. Select a tuning step of 0.02, then use Z+ (raise the nozzle) or Z− (lower the nozzle)
to adjust the height until the extrusion lines are evenly laid and properly aligned.
Proper fine-tuning helps achieve optimal first-layer adhesion and print quality.
The first layer very important
1. There are gaps between each lines, that means the Z-offset
need to be lower.
2. There are waves on the printing surface, that means the Z-
offset need to be higher
Explain:
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2. Resume printing after filament used off
The printer will pause, and the
yellow indicator light will turn on
Insert the new filament into
the extruder, then click “Load”
until the filament is extruded
from the nozzle.
Click “Resume” ,
continue to print from the
point of interruption.
7. Resume Printing
Note:
1. If the printed height is less than 1 mm, resume printing is not supported.
2. Prior to resuming the print, verify whether the nozzle has dropped. If so, use the "Force Move" function to position it
approximately 0.1 mm above the model surface.
3. After resuming the print, closely monitor the printing process and adjust the Z-offset via fine-tuning if necessary.
After power is restored, turn on the printer. It will perform a selfcheck. Then go to Settings > Power Loss
Recovery to resume printing.
1. Resume printing after power off
Installation:
Search "www.3dmingda.com/download" in any browser.
Download "MINGDA OrcaSlicer"
Configuration:
If you are the first time to use MingDa OrcaSlicer, you will
enter the configuration wizard.
Select the desired filament type.
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Select MingDa MD-400D, Click ”Confirm”.
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8. Slicing Software Installation and Usage
Select the printer model, filament type and printing parameter.
Usage
Click “Prepare”.
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Click , upload your STL in your slicer, adjust your model parameter, after finishing, click “Slice plate” to
create the Gcode file.
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LAN Printing (Recommend)
Ensure that the printer and the computer host are on the same local network.
Click "Settings" to enter the
settings page.
Click "Network" to enter
the network page.
Check the printer's IP address.
Click WIFI , select Host type as Octo/Klipper, enter the printer’s IP address, and click “Test” and “OK”
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Printing
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Copy gcode from USB to printer
Click “Copy”
Then click “Save”
Remove the text before the .gcode name
and including the "/" symbol.
Click the dropdown icon in the top right corner , select "Print."
Click "Print" and choose "Upload and Print."
File Transfer:
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After successful connection, click on "Device"
Device Connection
1.Task List
4.Movement
Control
2.Temperature Control
5.Printer Limits 6.Console
3.Camera
Enter the control interface below the diagram
1. Task List: Drag G-code files to this task list for printing.
2. Temperature Control: Displays machine temperature changes and allows pre-setting
nozzle and bed temperatures.
3. Camera: Monitors the printing status.
4. Movement Control: Controls the movement of each axis and allows compensation
settings after leveling.
5. Printer Limits: Controls the maximum acceleration of the printer, usually doesn't need
to be changed.
6. Console: Sends G-code commands to run the machine and displays error output.
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Copy Mode
Print Size: X * Y * Z: (2*200) * 400 * 400mm
Print Mode
In duplication mode, select the MingDa 400D 0.4mm nozzle for slicing. Place the models on the left side of the build
platform, ensuring they do not cross the blue line, as shown in the image. Then make a slicing directly and save the
gcode inside Udisk.
Insert the U-disk.
In the printer interface:
Choose the print file for printing.
Select "Print."
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Choose “Copy Print”.
Insert the U-disk on the printer, and follow the bellow operation to make a copy printing.
Note：The model must be placed on the left side and sliced by T0 extruder.
Mirror Mode
Print Size: X * Y * Z: (2*160) * 400 * 400mm
In mirror mode, select the MingDa 400D 0.4mm nozzle for slicing. Place the models on the left side, ensuring they do
not exceed the red area on the platform in the image to prevent nozzle collisions.
In the printer interface:
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Insert the U-disk.
Choose the print file for printing.
Select "Print."
Choose “Mirror Print”.
Note：The model must be placed on the left side and sliced by T0 extruder.
Insert the U-disk on the printer, and follow the bellow operation to make a mirror printing.
Print Two Colors
Printing size: 400 * 400 * 400mm
Selecting the MingDa 400D 0.4 nozzle
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1. In the Process section, click to switch to the "Objects" option.
2. Click on the color box next to the STL file to select the desired filament.
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In the printer interface:
Select "Print", Insert the U-disk. Choose the print file for printing.
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Choose “ Print”.
Double extrusion: Start the Prime tower
Because there is always one printer in standby mode during the printing process, it is easy to
cause defects such as wire drawing and material leakage. Prime tower can solve this problem,
the extruder will print a prime tower before each layer printing. Any material leakage will be
printed on the tower, effectively avoiding the phenomenon of material leakage when replacing
the extruder.
If you want to print the following two modes, we recommend adding this option to your Gcode.
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1. Select the "Global" section.
2. Select the "Multimaterial" section.
3. Check the "Enable" option in the "Prime tower" settings.
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Note:
1. Avoid setting the wipe tower size too small, as insufficient purging may lead to filament mixing.
2. Ensure the prime tower is positioned away from the model to prevent overlap.
Printing Support
Printing size: 400 * 400 * 400mm
Selecting the MingDa 400D 0.4 nozzle (Dual)
In the printer interface:
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1. Choose and modify the filament information.
2. Then, select the "Support" section.
3. Check the "Enable support" option.
4. In the "Filament for Supports" option, choose the filament needed for supports.
5. Click "Slice plate" to preview.
Select "Print", Insert the U-disk. Choose the print file for printing.
Choose “ Print”.
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1. Do not allow PET-GF, PET-CF, PA12-CF, HTPA-GF, HTPA-CF or S-Multi to absorb moisture.
1. Dry the filament before printing as long as you are not sure if the filament is damp.
2. After drying the filament, please store it in filament cabinet with driers
3. If the printer will not be used for an extended period, please store the filament in a sealed container, preferably in a dry
cabinet.
2. Avoid PLA-HF/PETG-HF clogged during printing
1.When printing PLA with a bed temperature above 45 °C, open the front door to prevent heat buildup and extrusion issues.
2.When printing PETG with a bed temperature around 70 °C, open the front door to prevent overheating that may cause
extrusion issues or nozzle clogging.
3. To prevent warping, take caution when printing with ABS-HF, PA12-CF, HTPA-GF, HTPA-CF, ABS-
GF25, ABS-CF20, HtPA-GF25, and HtPA-CF25.
If the model size is large and the fill rate is set high, such as 60% (the default value is 15%), warping occurs and it can be
adjusted down appropriately. In addition, change the fill pattern to a spiral to reduce the risk of shrinkage. For some
structural parts with high strength requirements, you can set 5 layers of walls and a fill rate of about 25%, and try to avoid
using a fill rate of more than 50% to reduce the shrinkage tendency; for most non-structural parts with low strength
requirements, you can directly select the default 2 layers of walls and a fill rate of 15%.
1. Set the nozzle temperature to 250–300 °C.
2. Manually unload the remaining high-temperature filament.
3. Load the new low-temperature filament and manually extrude it.
4. Continue extrusion until all residual high-temp material is flushed out and the new filament flows smoothly.
5. Lower the nozzle temperature to 220–240 °C, and continue extruding while the nozzle cools down to ensure smooth flow
of the new filament.
If extrusion fails during the flushing process, increase the nozzle temperature and consider using a cleaning needle to clear
the nozzle
10. Printing Tips for different filaments
9. Maintenance and Care
Hotend:
If you print high-temperature materials or engineering materials for a long time, the inner wall of the hot end will gradually
carbonize, which will ultimately affect the extruder out of the material is not smooth, if you find that the model has a fault or
spitting material is not uniform, it may be this reason.
Replacing Filaments:
Timely replace filaments based on the type and actual usage. It is recommended to use filaments recommended by the
manufacturer. Seal filament not in use for an extended period, as excessive exposure to moisture in the air can make the
filament brittle.
PEI plate:
Please avoid touch the PEI bed by hand. It can be cleaned by dish soap with warm water and dry it by a clean cloth.
Regular Lubrication:
Once every 3 months. Home the printer first and grease it and move the Z+ to the top, then home the printer and grease again
until the screw rods full with the grease, after that clean the excess grease. If there are noise during moving. You can grease the
oil on the idler wheels when there are noise.
Software Updates:
Regularly update the printing software to improve print quality and efficiency.
4. After printing with high-temperature materials such as PA-CF, PET-CF, or PET-GF, and
before switching to low-temperature, lower-hardness materials like PLA or PETG, it is
recommended to follow these steps:
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Email: [email protected]
www.3dmingda.com
Address: No. 19, Dahe Industrial Zone, Longhua District,
Shenzhen, 518110, Guangdong Province, China.
Shenzhen MINGDA Technology Co., Ltd
Customer SupportOfficial Website
