14.0Troubleshooting the PM2020 Lathe
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 | Remedy | |
|
| |
Power line overloaded. | Correct overload condition. | |
Undersize wires in power supply | Increase supply wire size. | |
system. | ||
| ||
Faulty inverter. | Contact Powermatic Technical Service. | |
Worn motor. | Replace motor. | |
Excessive cut. | Reduce depth of cut. | |
Improper belt adjustment, or worn or | Adjust or replace belt as needed (see | |
broken belt. | sect. 9.12). | |
Improper cooling of motor. | Blow out sawdust from motor housing | |
| fan. | |
Worn spindle bearings. | Replace bearings. | |
Worn motor. | Replace motor. | |
Workpiece warped, out of round, has | Correct problem by planing or sawing | |
major flaw, or was improperly prepared | workpiece, or discard entirely and use | |
for turning. | 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. | |
Potentiometer faulty. | Replace potentiometer. | |
Electronic AC inverter is not | Contact Powermatic Technical Service | |
programmed properly, or is defective, or | ||
to help identify problem; | ||
there is loose wiring. | ||
| ||
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. | |
Excessive pressure being applied by | Slide headstock to the left end, then | |
tailstock (more than 500 lbs. of force). | apply pressure to workpiece with | |
| tailstock. Apply only sufficient force with | |
| tailstock to hold workpiece securely in | |
| place. | |
Cam lock nut needs adjusting. | Tighten cam lock nut (sect. 9.2). | |
Lathe bed and tailstock mating surfaces | Remove tailstock and clean surfaces | |
are greasy or oily. | with a cleaner/degreaser. | |
| coat of oil to Lathe bed surface. |
Table 3
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