Grizzly VS MILLING MACHINE G0669X - Manual (Page 46)

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g0669X precision 10" x 54" Vs Milling Machine
Motor & Electrical (continued)
symptom possible Cause possible solution
Machine stalls or is
overloaded. 11. Contactor not getting energized or has poor
contacts.
12. Motor has overheated.
13. spindle rotation switch at fault.
14. Motor is at fault.
15. Frequency drive at fault.
11. test for power on all legs and contactor operation.
replace if at fault.
12. Let cool, Clean off motor, and reduce workload.
13. turn switch to FWd/reV; replace bad switch.
14. test/repair/replace.
15. test/replace.
Machine has
vibration or noisy
operation.
1. Chuck or cutter is at fault.
2. Workpiece alignment is poor.
3. Motor or component is loose.
4. pulley is loose.
5. Motor mount loose/broken.
6. Machine is incorrectly mounted or sits
unevenly.
7. Motor fan is rubbing on fan cover.
8. Motor bearings are at fault.
9. gearbox is at fault.
1. replace out-of-round chuck; replace/resharpen
cutter; use appropriate feed rate and cutting rpM.
2. eliminate workpiece binding; use vise or clamps as
required for workpiece alignment control.
3. inspect/replace stripped or damaged bolts/nuts, and
re-tighten with thread locking fluid.
4. realign/replace shaft, pulley, setscrew, and key as
required.
5. tighten/replace.
6. tighten/replace anchor studs in floor; relocate/shim
machine.
7. replace dented fan cover; replace loose/damaged
fan.
8. test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
9. rebuild gearbox for bad gear(s)/bearing(s).