-56-
For Machines Mfd. Since 10/21
South Bend Tools
Model SB1118
TROUBLESHOOTING
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
Feed motor does
not start or stalls.
1.
Motor brushes worn out.
1.
Replace motor brushes (Page 50).
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 or
at fault.
2.
Reset circuit breaker on switch.
3.
Blown fuse.
3.
Replace fuse/ensure no shorts.
4.
Incorrect power supply voltage or
circuit size.
4.
Ensure correct power supply voltage and circuit
size.
5.
Motor speed potentiometer at fault.
5.
Test/replace if at fault.
6.
Power supply circuit breaker
tripped or fuse blown.
6.
Ensure circuit is free of shorts. Reset circuit breaker
or replace fuse.
7.
Motor wires connected incorrectly.
7.
Correct motor wiring connections.
8.
Thermal overload relay has tripped/
at fault.
8.
Reset. Adjust or replace if at fault.
9.
Contactor not energized/at fault.
9.
Test all legs for power; replace if necessary.
10.
Wiring broken, disconnected, or
corroded.
10.
Fix broken wires or disconnected/corroded
connections.
11.
Motor brushes worn out.
11.
Remove/replace brushes (Page 50).
12.
MAIN MOTOR button or circuit
breaker switch at fault.
12.
Replace switch/circuit breaker.
13.
Circuit board at fault.
13.
Inspect/replace if at fault.
14.
Headstock cover safety switch
engaged/at fault.
14.
Close headstock cover; replace switch.
15.
Motor or motor bearings at fault.
15.
Replace motor.
Machine stalls or is
underpowered.
1.
Workpiece material unsuitable for
machine.
1.
Only cut wood/ensure moisture is below 20% (Page
28).
2.
Feed rate/cutting speed too fast.
2.
Decrease feed rate/cutting speed.
3.
Machine undersized for task.
3.
Use correct blade/reduce feed rate or depth of cut.
4.
Circuit board at fault.
4.
Inspect and replace if at fault.
5.
Motor speed potentiometer at fault.
5.
Test and replace if at fault.
6.
Belt(s) slipping/pulleys misaligned.
6.
Clean/tension/replace belt(s) (Page 44); ensure
pulleys are aligned (Page 51).
7.
Feed motor wired incorrectly.
7.
Wire motor correctly.
8.
Feed motor brushes worn out.
8.
Replace motor brushes (Page 50).
9.
Pulley/sprocket slipping on shaft.
9.
Tighten/replace loose pulley/shaft.
10.
Motor overheated, tripping machine
circuit breaker.
10.
Clean motor, let cool, and reduce workload. Reset
breaker.
11.
Contactor not energized/at fault.
11.
Test all legs for power; repair/replace if at fault.
12.
Feed motor or motor bearings at
fault.
12.
Replace motor.
