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SECTION 7: SERVICE
Review the troubleshooting and 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.
Motor & Electrical
Symptom
Possible Cause
Machine does not
1. Emergency stop button depressed/at fault.
start or a breaker
2. Plug/receptacle at fault/wired wrong.
trips.
3. Incorrect power supply voltage or circuit
size.
4. Column cover interlock safety switch is
engaged.
5. Blown machine fuse.
6. Power supply circuit breaker tripped or fuse
blown.
7. Motor wires connected incorrectly.
8. Wiring open/has high resistance.
9. Start capacitor at fault (horizontal motor
only).
10. Potentiometer/variable-speed dial controller
at fault.
11. Contactor not energized/has poor contacts.
12. Inverter/control box at fault.
13. Motor at fault.
Machine stalls or is
1. Machine undersized for task.
underpowered.
2. Feed rate/cutting speed too fast.
3. Wrong workpiece material.
4. Belt(s) slipping.
5. Oil/grease on belt(s).
6. Motor wired incorrectly.
7. Gearbox at fault.
8. Motor overheated.
9. Run capacitor at fault (horizontal motor
only).
10. Pulley/sprocket slipping on shaft.
11. Contactor not energized/has poor contacts.
Model G0757Z (Mfd. Since 02/15)
Troubleshooting
Possible Solution
1. Rotate button head to reset. Replace.
2. Test for good contacts; correct the wiring.
3. Ensure correct power supply voltage and circuit
size.
4. Re-adjust component to disengage column cover
interlock safety switch.
5. Replace fuse/ensure no shorts.
6. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
7. Correct motor wiring connections.
8. Check/fix broken, disconnected, or corroded wires.
9. Test/replace.
10. Test/replace.
11. Test all legs for power/replace.
12. Inspect inverter/controller box; replace.
13. Test/repair/replace.
1. Use correct cutter/bit; reduce feed rate; reduce
spindle RPM; use coolant if possible.
2. Decrease feed rate/cutting speed.
3. Use correct type/size of metal.
4. Tension/replace belt(s); ensure pulleys are aligned.
5. Clean belt(s).
6. Wire motor correctly.
7. Select appropriate gear ratio; replace broken or
slipping gears.
8. Clean motor, let cool, and reduce workload.
9. Test/repair/replace.
10. Replace loose pulley/shaft.
11. Test all legs for power/replace.
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