-34-
For Machines Mfd. Since 10/20
South Bend Tools
Model SB1091
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.
Machine does not
start or a breaker
trips.
1.
Knee Stop button is engaged/at
fault.
1.
Rotate clockwise slightly until it pops out/replace it.
2.
Wiring is open/has high resistance.
2.
Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
3.
Motor START or EMERGENCY
STOP button is at fault.
3.
Replace at fault START or EMERGENCY STOP
button.
4.
Fuse has blown.
4.
Correct short/replace fuse on control panel.
5.
Power supply switched OFF or is at
fault.
5.
Ensure power supply is switched on; ensure power
supply has the correct voltage.
6.
Start capacitor is at fault.
6.
Test/replace if at fault.
7.
Thermal overload relay has tripped.
7.
Turn cut-out dial to increase working amps and
push the reset pin. Replace if tripped multiple
times. Reduce workload on machine or test and
replace motor. If motor is OK, replace relay.
8.
Wall fuse/circuit breaker is blown/
tripped.
8.
Ensure circuit size is suitable for this machine;
correct for short. Reset/replace fuse or breaker.
9.
Contactor not getting energized/has
burnt contacts.
9.
Test for power on all legs and contactor operation.
Replace unit if at fault.
10.
Motor is at fault.
10.
Test/repair/replace.
Machine has
excessive vibration
or noise.
1.
Motor or component is loose.
1.
Inspect/replace stripped or damaged bolts/nuts, and
re-tighten with thread locking fluid.
2.
Inserts are at fault.
2.
Rotate or replace inserts causing problem.
3.
V-belt worn or loose.
3.
Inspect/replace belt with a new one (Page 45).
4.
Pulley is loose.
4.
Realign/replace shaft, pulley, setscrew, and key as
required.
5.
Motor mount loose/broken.
5.
Tighten/replace.
Machine stalls or is
underpowered.
1.
Feed rate/cutting speed too fast for
task.
1.
Decrease feed rate/cutting speed.
2.
Workpiece material is not suitable
for this machine.
2.
Only cut wood products; make sure moisture
content is below 20% and there are no foreign
materials in the workpiece.
3.
Belt slipping.
3.
Replace bad belt, align pulleys, and re-tension.
4.
Motor connection is wired
incorrectly.
4.
Correct motor wiring connections.
5.
Motor bearings are at fault.
5.
Test by rotating shaft; rotational grinding/loose
shaft requires bearing replacement.
6.
Contactor not getting energized or
has poor contacts.
6.
Test for power on all legs and contactor operation.
Replace if at fault.
7.
Motor has overheated.
7.
Clean off motor, let cool, and reduce workload.
8.
Motor is at fault.
8.
Test/repair/replace.
Symptom
Possible Cause
Possible Solution
