Troubleshooting - Operational Problems; Replacement Parts - Jet 22-44OSC Operating Instructions And Parts Manual

Troubleshooting – Operational Problems
Trouble
Ripples in sanded
surface.
(Non-uniformly spaced
ripples).
Ripples in sanded
surface.
(Uniformly spaced
ripples).
Sniping of wood
(gouging near end of
board).
Burning of wood.
Gouging of wood.
Line or groove in stock.
Lines or groove in stock
while in oscillation mode
Unsanded ridge along
length of piece
(sandpaper appears
clean).

Replacement Parts

Replacement parts are listed on the following pages. To order parts or reach our service department, call
1-800-274-6848, Monday through Friday (see our website for business hours, www.jettools.com). Having
the Model Number and Serial Number of your machine available when you call will allow us to serve you
quickly and accurately.
Probable Cause
Uneven feed rate.
Excessive feed rate.
Excessive depth of cut.
Sander vibration.
Tension rollers set too low.
Stock not supported properly during
infeed or outfeed.
Conveyor drive roller or driven roller
higher than conveyor belt surface.
Feed rate too slow.
Excessive depth of cut for grit used.
Excess build-up on abrasive strips.
Abrasive is too fine.
Abrasive strips are overlapped.
Drum out of alignment.
Conveyor belt is loose.
Excessive depth of cut.
Wood slipping on conveyor due to
lack of contact.
Abrasive is too fine.
Inconsistent feed rate.
Feed rate not set to maximum.
Grit has been removed from
backing.
Remedy
Check for these conditions and refer to
previous Troubleshooting sections:
- Conveyor belt slips on drive roller.
- Board slips on conveyor belt.
- Conveyor gear motor stalls.
- Excessive v-belt tension.
- Set-screw loose on shaft coupler
between gear motor and conveyor.
- Conveyor bushings worn – replace.
- Conveyor bushings dry – lubricate.
Reduce depth of cut and/or feed rate.
Reduce depth of cut and/or feed rate.
Check for these conditions:
- Loose bolts, or loose bearing and pulley
set-screws – re-tighten.
- Dirty drum – clean inside.
- Excessive v-belt tension – reduce
tension.
- Worn v-belt – replace.
- Warped drive pulley – replace.
- Drum out of balance – contact your dealer or
JET authorized service center.
Re-set tension rollers; see Tension Roller
Adjustment.
Support stock with roller stand, tables or
benches.
Re-adjust roller(s).
Increase feed rate.
Reduce depth of cut or increase grit
coarseness.
Reduce depth of cut; clean strips or replace;
angle stock when feeding.
Replace with abrasive of coarser grit.
Rewrap strip without overlap. See pages 11-12.
Re-align drum. See pages 16-17.
Adjust conveyor belt tension. See page 15.
Reduce depth of cut.
Use alternate feeding procedure.
Replace with coarser grit.
Do not stop or change the feed rate while
feeding stock.
Set feed rate to maximum.
Avoid this area of drum, or replace abrasive
strip.
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