Troubleshooting - Jet JWL-1442VS Operating Instructions And Parts Manual

Problem
Excessive Vibration.
Motor or Spindle Stalls or Will not
Start
Motor fails to develop full power.
Tools tend to grab or dig in.
Tailstock Moves When Applying
Pressure

Troubleshooting

Possible Cause
1. Workpiece warped, out of
round, has major flaw,
improperly prepared for
turning, or RPM is set too
high
2. Worn spindle bearings
3. Worn belt
4. Motor mount bolts loose
5. Lathe on uneven surface
1. Excessive cut
2. Worn motor
3. Broken belt
4. Worn spindle bearings
5. Improper cooling on motor
6. Starting or running capacitor
is bad
7. Centrifugal switch bad
1. Power line overloaded
2. Undersize wires in supply
system, or extension cord is
too long
3. Low voltage
4. Running capacitor is bad
5. Worn motor
1. Dull tools
2. Tool support set too low
3. Tool support set too far from
workpiece
4. Improper tool being used
1. Excessive pressure being
applied by tailstock. Note:
The screw action of the
tailstock is capable of
applying excessive pressure
to workpiece and headstock.
Apply only sufficient force by
tailstock to hold workpiece
securely in place.
Excessive pressure can
cause damage to machine.
2. Lathe bed and tailstock
mating surfaces are greasy
or oily.
21
Solution
1. Correct problem by planing,
bandsawing, reduce the
RPM, or scrap workpiece all
together
2. Replace bearings
3. Replace belt
4. Tighten bolts
5. Shim lathe bed, or adjust feet
on stand
1. Reduce cut depth
2. Replace motor
3. Replace belt
4. Replace bearings
5. Clean sawdust from motor
fan
6. Replace the starting
capacitor
7. Replace centrifugal switch
1. Correct overload condition
2. Increase supply wire size
3. Request voltage check from
power company and correct
low voltage condition
4. Replace running capacitor
5. Replace motor
1. Sharpen tools
2. Reposition tool support
height
3. Reposition tool support
closer to workpiece
4. Use correct tool for operation
1. Slide tailstock down to the
right side of the lathe against
the stop. Move headstock
into position and apply
pressure to workpiece with
tailstock.
2. Remove and clean surfaces
with a cleaner degreaser