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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.
Symptom
Possible Cause
Machine does not
1. Emergency Stop button engaged/at fault.
start or a breaker
2. Power supply switched OFF or at fault.
trips.
3. Motor connection wired incorrectly.
4. Thermal overload relay has tripped.
5. Power supply fuse/circuit breaker is blown/
tripped.
6. Contactor not getting energized or has
burnt contacts.
7. Wiring is open/has high resistance.
8. Motor at fault.
Machine stalls or is
1. Feed rate too fast.
overloaded.
2. Motor connection wired incorrectly.
3. Motor bearings at fault.
4. Machine undersized for task.
5. Contactor not getting energized/has burnt
contacts.
6. Motor has overheated.
7. Motor at fault.
Loud repetitious
1. Motor mounting loose.
noise coming from
2. Motor fan hitting cover.
machine.
3. Abrasive belt torn.
Abrasive belt stops
1. Abrasive belt not properly tensioned.
rotating under load.
2. Feed rate too fast.
Abrasive belt tracks
1. Abrasive belt tracking not properly set.
to one side under
2. Abrasive belt not properly tensioned.
load.
Abrasive belt
1. Tube not moved across face of abrasive
excessively worn in
belt during operation.
one spot.
Tube has burn
1. Abrasive belt worn/not correct grit for task.
marks at notch.
2. Feed rate too fast.
Notch not centered
1. Profile roller not even with center of tube.
on tube.
-30-
Troubleshooting
Possible Solution
1. Rotate clockwise until it pops out/replace.
2. Ensure power supply is switched ON; ensure power
supply has correct voltage.
3. Correct motor wiring connections (Page 34).
4. Disconnect machine from power, turn amperage
dial on thermal overload relay to a higher setting.
5. Ensure power supply circuit size is adequate for this
machine (Page 10); replace weak breaker.
6. Test for power on all legs and contactor operation.
Replace if faulty.
7. Check for broken wires or disconnected/corroded
connection, and repair/replace as necessary.
8. Test/repair/replace.
1. Reduce feed rate.
2. Correct motor wiring connections (Page 34).
3. Test by rotating motor shaft; rotational grinding/
loose shaft requires bearing replacement.
4. Use new abrasive belt with appropriate grit; reduce
feed rate.
5. Test for power on all legs and contactor operation.
Replace if faulty.
6. Clean off motor, let cool, and reduce workload.
7. Test/repair/replace.
1. Retighten motor mount fasteners.
2. Repair/replace motor fan; remove any dents in
cover.
3. Replace abrasive belt (Page 21).
1. Properly tension abrasive belt (Page 21).
2. Reduce feed rate.
1. Properly set abrasive belt tracking (Page 23).
2. Properly tension abrasive belt (Page 21).
1. Use traverse crank to evenly move tube across face
of abrasive belt during operation.
1. Use new abrasive belt with appropriate grit.
2. Reduce feed rate.
1. Adjust profile roller height (Page 31).
Model G0767 (Mfd. Since 1/14)
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