Troubleshooting - Powermatic 3520B Operating Instructions And Parts Manual

Troubleshooting

Trouble
Motor fails to develop
full power.
Motor or spindle
stalls or will not start.
Excessive vibration.
Lathe runs at one
speed only.
Tools tend to grab or
dig in.
Headstock moves
when applying
pressure with
Tailstock.
Tailstock moves
when applying
pressure.
Probable Cause
Power line overloaded.
Undersize wires in power supply
system.
Faulty inverter.
Worn motor.
Excessive cut.
Improper belt adjustment, or worn or
broken belt.
Improper cooling of motor.
Worn spindle bearings.
Worn motor.
Workpiece warped, out of round, has
major flaw, or was improperly
prepared for turning.
Worn spindle bearings.
Worn drive belt.
Motor mount lock handle is loose.
Lathe on uneven surface.
Potentiometer faulty.
Electronic AC inverter is not
programmed properly, or is defective,
or there is loose wiring.
Dull tools.
Tool support set too low.
Tool support set too far from
workpiece.
Improper tool being used.
Excessive pressure being applied by
tailstock (more than 500 lbs. of force).
Cam lock nut needs adjusting.
Lathe bed and tailstock mating
surfaces are greasy or oily.
Remedy
Correct overload condition.
Increase supply wire size.
Contact WMH Technical Service.
Replace motor.
Reduce depth of cut.
Adjust or replace belt as needed (see
pages 18-19).
Blow out sawdust from motor housing
fan.
Replace bearings.
Replace motor.
Correct problem by planing or sawing
workpiece, or discard entirely and use
new workpiece.
Replace spindle bearings.
Replace drive belt. See pages 18-19.
Tighten lock handle (A, Figure 25).
Adjust levelers.
Replace potentiometer.
Contact WMH Technical Service to
help identify problem; 800-274-6846.
Keep tools sharp (see page 21).
Reposition tool support height. See
page 23.
Reposition tool support closer to
workpiece (page 23).
Use correct tool for operation.
Slide headstock to the left end, then
apply pressure to workpiece with
tailstock. Apply only sufficient force
with tailstock to hold workpiece
securely in place.
Tighten cam lock nut (Figure 15).
Remove tailstock and clean surfaces
with a cleaner/degreaser. Re-apply
light coat of oil to Lathe bed surface.
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