Loading ...
Loading ...
Loading ...
trouble shooting -- motor
NOTE: Motors used on wood-working tools are particularly susceptible to the
accumulation of sawdust and wood chips and should be blown out or "vacuumed"
frequently to prevent interference with normal motor ventilation and proper
operation of the centrifugally-operated starting switch
TROUBLE
Excessive noise_
Motor fails to develop
lull power° NOTE:
LOW VOLTAGE: (Power
output of motor
decreases rapidly with
decrease in voltage at
motor terminals For
example, a reduction of
10% in voltage causes
a reduction of 19% in
maximum power output
of which the motor is
capable, and a reduction
of 20% in voltage causes
a reduction of 36% in
maximum power
output.)
Motor starts slowly
or fails to come up
to full speed°
Motor overheats.
Starting switch in
motor wilt not operate.
Motor stalls
(resulting in blown
fuses or tripped
circuit breakers)
Frequent opening of
fuses or circuit
breakers,
PROBABLE CAUSE
I
1 Motor 1
t Circuit overloaded with 1,
lights, appliances and
other motors.
2 Undersize wires or circuit 2
too long
3, General overloading of 3
power company
facilities
1. Low voltage 1
2 Windings burned out 2,
or open
3 Starting switch not 3
operating.
t Motor overloaded
2 Improper cooling (Air 2,
circulation restricted
through motor due to
sawdust accumulation,
"1 Burned switch contacts 1
(due to extended hold-in
periods caused by low Iine
voltage, etc,)
2 Shorted capacitor 2
3 Loose or broken 3
connections.
1
1 Starting switch not
operating
2 Voltage too low to permit 2
motor to reach operating
sReed
3, Fuses or circuit breakers 3
do not have sufficient
capacity.
1 Motor overloaded
2 Fuses or circuit breakers
REMEDY
Have motor checked by qualified service
technician. Repair service is available at your
nearest Sears store,
Do not use other appliances or motors on
same circuit when using the saw
Increase wire sizes, or reduce length of wiring
See "Motor Specifications and Electrical
Requirements" section,
Request a voltage check from the power
company
Request voltage check from the power
company, Check size of circuit wiring
Have motor repaired or replaced
Blow out sawdust from motor Have motor
repaired.
Feed work slower into blade,
Clean out sawdust to provide normal air
circulation through motor See "Maintenance
and Lubrication" section
Have switch replaced and request a voltage
check from the power company
Have capacitor tested and replace if defective.
Have wiring checked and repaired
Have switch replaced
Request voltage check from the power
company
Install proper size fuses or circuit breakers,
capacityd°not have sufficient I 3
3 Starting switch not Have switch replaced Blow out sawdust,
l Feed work slower into blade,
2 Install proper size fuses or circuit breakers
Check that wiring will handle load
operating (motor does not
reach speed)
31
Loading ...
Loading ...
Loading ...