Troubleshooting The Jwl-1221Vs Lathe - Jet JWL-1221VS Operating Instructions And Parts Manual

15.0 Troubleshooting the JWL-1221VS Lathe

Table 3
Trouble
Motor fails to develop
full power
Motor or spindle stalls
or will not start
Excessive vibration
Tools tend to grab or
dig in
Tailstock moves when
applying pressure
RPM shown on digital
readout is incorrect
(lower than speed
chart)
E1 shown on digital
readout
E3 shown on digital
readout
E4 shown on digital
readout
E6 shown on digital
readout
Probable Cause
Power line overloaded
Undersize wires in power supply
system.
Worn motor
Excessive cut
Improper belt adjustment, or worn or
broken belt
Motor brushes are worn or damaged
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 mounting fasteners are loose
Lathe on uneven surface
Dull tools
Tool support set too low
Tool support set too far from work piece
Improper tool being used
Cam lock nut needs adjusting
Lathe bed and tailstock mating surfaces
are greasy or oily
Voltage too low (95 or under)
Overheating in heat sink
Voltage too high
Overload limiter in circuit board
activated
Spindle sensor not working
Remedy
Correct overload condition
Increase supply wire size.
Replace motor
Reduce depth of cut
Adjust or replace belt as needed
Replace brushes
Replace bearings
Replace motor
Correct problem by planing or sawing
workpiece, or discard entirely and use
new workpiece
Replace spindle bearings
Replace drive belt
Tighten fasteners
Place lathe on flat surface
Keep tools sharp
Reposition tool support height
Reposition tool support closer to work
piece
Use correct tool for operation
Tighten cam lock nut
Remove tailstock and clean surfaces
with a cleaner/degreaser. Re-apply light
coat of oil to lathe bed surface.
Request voltage check from power
company
Reduce depth of cut
Request voltage check from power
company
Reduce depth of cut
Check connectors of spindle sensor
cord to switch box
Readjust sensor closer to sensor collar
Replace sensor collar (p/n JWL1221VS-
110)
Replace sensor set (p/n JWL1221VS-
112)
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