Jet JWL-1840DVR, Operating Instructions And Parts Manual

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11.0 Troubleshooting JWL-1840EVS/DVR Lathes
11.1 Electrical and mechanical
Table 2
Symptom Possible Cause Correction *
Motor fails to develop
full power. Power line overloaded. Correct overload condition.
Undersized wires in supply system, or
extension cord is too long. Increase supply wire size.
Low voltage. Request voltage check from power
company and correct low voltage
condition.
Worn motor. Replace motor.
Motor or spindle stalls
or will not start. Excessive cut. Reduce depth of cut.
Worn or broken belt. Replace belt.
Improper cooling of motor. Blow out sawdust from motor housing
fan.
Worn spindle bearings. Replace bearings.
Worn motor. Replace motor.
Excessive vibration or
noises. Workpiece warped, out of round, has
major flaw, was improperly prepared for
turning. Correct problem by planing or sawing
workpiece, or discard entirely and use
new workpiece.
Spindle rotation too fast. Reduce speed.
Worn spindle bearings. Replace spindle bearings.
Drive belt misaligned or worn. Align belt. Replace if worn.
Motor mount bolts are loose. Tighten bolts.
Lathe on uneven surface. Adjust leveling feet.
Tools tend to grab or
dig in. Dull tools. Keep tools sharp.
Tool rest set too low. Reposition tool rest height.
Tool rest set too far from workpiece. Reposition tool rest closer to workpiece.
Improper tool being used. Use correct tool for operation.
Headstock moves
when applying
pressure with
Tailstock. Locking handle not tight. Tighten handle.
Excessive pressure being applied by
tailstock. Slide headstock to left end, lock firmly,
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.
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.) Slide tailstock to right side of lathe
against the stop. Move headstock into
position and apply pressure to
workpiece with tailstock.
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.
Digital readout does
not work. Digital sensor out of position or
damaged (JWL-1840EVS). Open belt access and inspect sensor.
Reposition or replace.
* WARNING: Some corrections may require a qualified electrician.