Grizzly G0643 Owner's Manual page 29

Motor & Electrical (continued)
Symptom Possible Cause
Machine stalls or is 1. Workpiece material is not suitable for this
overloaded.
machine.
2. Run capacitor is at fault.
3. Motor connection is wired incorrectly.
4. Plug/receptacle is at fault.
5. Motor/boring head bearings are at fault.
6. Machine undersized for task.
7. Motor has overheated.
8. Contactor not getting energized or has poor
contacts.
9. Motor is at fault.
10. Centrifugal switch is at fault.
Operation
Symptom Possible Cause
Machine slows when 1. Applying too much pressure to workpiece.
operating.
2. Boring bits are dull.
Holes do not line up 1. Longitudinal fence is not parallel with the
correctly.
boring head.
2. Workpiece not kept firmly against longitudi-
nal fence.
Holes bored at an 1. Table is not parallel with boring head.
angle.
2. Chuck or boring bit is at fault.
Depth of holes are 1. Table is not parallel with boring head.
not equal.
2. Heights of boring bits are not aligned.
Model G0643 21-Bit Line Boring Machine
Possible Solution
1. Only drill wood products; make sure moisture con-
tent is below 20% and there are no foreign materials
in the workpiece.
2. Test/repair/replace.
3. Correct motor wiring connections.
4. Test for good contacts; correct the wiring.
5. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
6. Use sharp bits/reduce downfeed rate.
7. Clean off motor, let cool, and reduce workload.
8. Test for power on all legs and contactor operation.
Replace if faulty.
9. Test/repair/replace.
10. Adjust/replace centrifugal switch if available.
Possible Solution
1. Slow the downfeed rate.
2. Replace boring bits.
1. Make sure that both ends of the longitudinal fence
are the same distance from the boring head/bit cen-
ters before tightening the locking levers.
2. Use push sticks to keep workpiece firmly against
longitudinal fence during drilling operation.
1. Align table parallel to boring head (see Page 29).
2. Replace out-of-round chuck; replace/re-install boring
bit.
1. Align table parallel to boring head (see Page 29).
2. Align the height of boring bits (see Page 30).
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