TROUBLESHOOTING
South Bend Tools
For Machines Mfd. Since 12/20
Model SB1108/SB1109
-47-
TROUBLESHOOTING
If you need replacement parts, or if you are unsure how to do any of the solutions given here, feel free
to call us at (360) 734-1540.
Symptom
Possible Cause
Possible Solution
Machine does not
start or power
supply breaker
immediately trips
after startup.
1.
EMERGENCY STOP button
depressed/at fault.
1.
Rotate EMERGENCY STOP button head to reset.
Replace if at fault.
2.
Machine circuit breaker tripped.
2.
Reset circuit breaker on control panel.
3.
Incorrect power supply voltage or
circuit size.
3.
Ensure correct power supply voltage and circuit
size.
4.
Power supply circuit breaker
tripped or fuse blown.
4.
Ensure circuit is free of shorts. Reset circuit breaker
or replace fuse.
5.
Thermal overload relay has tripped/
at fault.
5.
Reset. Adjust or replace if at fault.
6.
Start capacitor at fault.
6.
Test/replace if at fault.
7.
Contactor not energized/at fault.
7.
Test all legs for power; replace if necessary.
8.
Wiring broken, disconnected, or
corroded.
8.
Fix broken wires or disconnected/corroded
connections.
9.
Start button or circuit breaker
switch at fault.
9.
Replace button/circuit breaker switch.
10.
Centrifugal switch adjustment/
contact points at fault.
10.
Adjust centrifugal switch/clean contact points.
Replace either if at fault.
11.
Pulse width modulator circuit board
at fault.
11.
Inspect; replace if at fault.
12.
Motor or motor bearings at fault.
12.
Replace motor.
Machine stalls or is
underpowered.
1.
Workpiece material not suitable for
machine.
1.
Only cut wood/ensure moisture is below 20%
(Page 25).
2.
Feed rate/cutting speed too fast.
2.
Decrease feed rate/cutting speed (Page 28).
3.
Belts slipping/pulleys misaligned.
3.
Clean/tension/replace belts (Page 38) ; ensure
pulleys are aligned (Page 44).
4.
Pulley/sprocket slipping on shaft.
4.
Tighten/replace loose pulley/shaft.
5.
Machine undersized for task.
5.
Use sharp inserts; reduce feed rate/depth of cut.
6.
Motor overheated, tripping machine
circuit breaker.
6.
Clean motor/let cool, and reduce workload. Reset
breaker.
7.
Run capacitor at fault.
7.
Test/repair/replace.
8.
Extension cord too long.
8.
Move machine closer to power supply; use shorter
extension cord.
9.
Contactor not energized/at fault.
9.
Test all legs for power; repair/replace if at fault.
10.
Centrifugal switch/contact points
at fault.
10.
Adjust centrifugal switch/clean contact points.
Replace either if at fault.
11.
Motor or motor bearings at fault.
11.
Replace motor.
Feed motor does
not start or stalls.
1.
Motor brushes worn out.
1.
Replace motor brushes (Page 43).
