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21
13.0 Recommended Lathe Speeds (per diameter of workpiece)
Diameter of Work Roughing RPM General Cutting RPM Finishing RPM
Under 2” 1520 3000 3000
2” to 4” 760 1600 2480
4” to 6” 510 1080 1650
6” to 8” 380 810 1240
8” to 10” 300 650 1000
Table 2
14.0 Troubleshooting the JWL-1015/1015VS Lathes
Table 3
Trouble Probable Cause Remedy
Motor fails to develop
full power
Power line overloaded Correct overload condition
Undersized wires in power supply system. Increase supply wire size.
Too many machines on same circuit. Shut off other machines.
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
Motor brushes are worn or damaged Replace brushes
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
Motor mounting fasteners are loose Tighten fasteners
Lathe on uneven surface Place lathe on flat surface
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 work piece Reposition tool support closer to work
piece
Improper tool being used Use correct tool for operation
Tailstock moves when
applying pressure
Cam lock nut needs adjusting Tighten cam lock nut
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.
Red LED light display Overload limiter in circuit board activated Reduce depth of cut
Overheating in heat sink Reduce depth of cut
Spindle locked Release index pin
Green LED light and
Red LED light display
continuity (both are lit)
Motor cord disconnect Reconnect motor cord in PC board
Worn motor Replace motor
Circuit board burned out Replace circuit board
Table 3
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