Grizzly G0727, Owner'S Manual

Page: 31 / 48

Model G0727 (Mfg. Since 7/11)
-29-
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.
SECTION 7: SERVICE
Troubleshooting
Symptom Possible Cause Possible Solution
Machine does not
start or a breaker
trips. 1. OFF button is engaged/faulty.
2. Plug/receptacle is at fault or wired
incorrectly.
3. Motor was overloaded and the overload
lamp is illuminated.
4. Control box fuse is blown.
5. Motor connection wired incorrectly.
6. Wall fuse/circuit breaker is blown/tripped.
7. Power supply switched OFF or is at fault.
8. Wiring is open/has high resistance.
9. ON button/spindle speed dial is at fault.
10. Circuit board is at fault.
11. Motor is at fault.
1. Test/replace it.
2. Test for good contacts; correct the wiring.
3. Adjust the operation to reduce motor overload,
rotate spindle speed dial counterclockwise to a
minimum speed, then press the ON button to
re-enable power to the motor.
4. Correct the cause of the blown fuse, then replace
it.
5. Correct motor wiring connections (see Page 35).
6. Test for power on all legs and contactor operation.
Replace unit if faulty.
7. Ensure power supply is switched ON; ensure power
supply has the correct voltage.
8. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
9. Test/replace.
10. Replace.
11. Test/repair/replace.
Machine stalls or is
overloaded. 1. Feed rate/cutting speed too fast for task.
2. Machine is undersized for the task.
3. Wrong workpiece material.
4. Motor has overheated.
5. Motor connection is wired incorrectly.
6. Plug/receptacle is at fault.
7. Drive belt is at fault.
8. Drive belt pulley slipping on shaft.
9. Motor bearings are at fault.
10. Spindle speed dial is at fault.
11. Motor is at fault.
1. Decrease feed rate/cutting speed.
2. Use smaller sharp cutters/drill bits; reduce the feed
rate; reduce the spindle speed; use cutting fluid if
possible.
3. Use metal with correct properties for your type of
machining.
4. Clean off motor, run motor with no load to let it
cool, and reduce workload.
5. Correct motor wiring connections (see Page 35).
6. Test for good contacts; correct the wiring.
7. Re-tension/replace drive belt (see
Page 31).
8. Replace loose belt pulley.
9. Test by rotating shaft; rotational grinding/loose
shaft requires bearing replacement.
10. Replace.
11. Test/repair/replace motor.