Model G0781 (Mfd. Since 2/15)
-31-
SECTION 7: SERVICE
Troubleshooting
Symptom Possible Cause Possible Solution
Machine does not
start or a breaker
trips.
1. Emergency stop button depressed/at fault.
2. Incorrect power supply voltage or circuit
size.
3. Blown fuse in machine.
4. Power supply circuit breaker tripped or fuse
blown in wall panel.
5. Wiring open/has resistance.
6. ON/OFF switch at fault.
7. Potentiometer for variable-speed at fault.
8. Motor brushes at fault.
9. Circuit board at fault.
10. Spindle rotation switch at fault.
11. Motor at fault.
1. Release button head to reset/replace.
2. Ensure correct power supply voltage and circuit
size.
3. Replace fuse/ensure no shorts.
4. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
5. Test/replace.
6. Replace switch.
7. Test/repair/replace.
8. Remove/replace brushes.
9. Test/repair/replace.
10. Test/replace switch.
11. Test/repair/replace.
Machine stalls or is
overloaded.
1. Machine undersized for task.
2. Wrong workpiece material.
3. Dull tooling.
4. Motor wired incorrectly.
5. Motor overheated.
6. Motor brushes at fault.
7. Motor potentiometer at fault.
8. Spindle rotation switch at fault.
1. Use correct cutter/bit; reduce feed rate; reduce
spindle RPM; use coolant if possible.
2. Use correct type/size of metal.
3. Sharpen/replace tooling.
4. Wire motor correctly.
5. Clean motor, let cool, and reduce workload.
6. Remove/replace brushes.
7. Test/repair/replace.
8. Test/repair/replace.
Machine has
vibration or noisy
operation.
1. Machine is incorrectly mounted to
workbench or floor.
2. Motor or machine component loose.
1. Adjust placement, change mounting area, shim, or
tighten mounting hardware.
2. Inspect/replace damaged bolts/nuts, and retighten
with thread locking fluid.
Motor & Electrical
Review the troubleshooting procedures in this section if a problem develops with your machine. If you need
replacement parts or additional help with a procedure, call our Technical Support. Note: Please gather
the
serial number and manufacture date of your machine before calling.
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