24
14.0
Troubleshooting the PM2020 Lathe
Trouble Probable
Cause
Remedy
*
Motor fails to develop
full power.
Power line overloaded.
Correct overload condition.
Undersize wires in power supply
system.
Increase supply wire size.
Faulty inverter.
Contact Powermatic Technical Service.
Worn motor.
Replace motor.
Motor or spindle stalls
or will not start.
Excessive cut.
Reduce depth of cut.
Improper belt adjustment, or worn or
broken belt.
Adjust or replace belt as needed (see
sect. 9.12
).
Improper cooling of motor.
Blow out sawdust from motor housing
fan.
Worn spindle bearings.
Replace bearings.
Worn motor.
Replace motor.
Excessive vibration.
Workpiece warped, out of round, has
major flaw, or was improperly prepared
for turning.
Correct problem by planing or sawing
workpiece, or discard entirely and use
new workpiece.
Worn spindle bearings.
Replace spindle bearings.
Worn drive belt.
Replace drive belt. See
sect. 9.12
.
Motor mount lock handle is loose.
Tighten lock handle (A, Figure 22).
Lathe on uneven surface.
Adjust levelers.
Lathe runs at one
speed only.
Potentiometer faulty.
Replace potentiometer.
Electronic AC inverter is not
programmed properly, or is defective, or
there is loose wiring.
Contact Powermatic Technical Service
to help identify problem; 800-274-6846.
Tools tend to grab or
dig in.
Dull tools.
Keep tools sharp.
Tool support set too low.
Reposition tool support height.
Tool support set too far from workpiece. Reposition tool support closer to
workpiece.
Improper tool being used.
Use correct tool for operation.
Headstock moves
when applying
pressure with
Tailstock.
Excessive pressure being applied by
tailstock (more than 500 lbs. of force).
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.
Tailstock moves when
applying pressure.
Cam lock nut needs adjusting.
Tighten cam lock nut (
sect. 9.2
).
Lathe bed and tailstock mating surfaces
are greasy or oily.
Remove tailstock and clean surfaces
with a cleaner/degreaser. Re-apply light
coat of oil to Lathe bed surface.
* WARNING:
Some remedies may require a qualified electrician.
Table 3
