20
13.0
Troubleshooting JWDS-series Drum Sander
Symptom
Possible Cause
Correction *
Drum motor won’t start
when switch is activated.
No incoming current.
Check connections at plug or circuit panel.
Safety key missing from switch.
Install safety key.
Low voltage.
Check power line for proper voltage.
Open circuit in motor or loose
connection.
Inspect all lead connections on motor for
loose or open connections.
Switch malfunction.
Replace switch.
Drum motor will not start:
fuses blow or circuit
breakers trip.
Short circuit in line cord or plug.
Inspect cord or plug for damaged insulation
and shorted wires.
Short circuit in motor or loose
connections.
Inspect all connections on motor for loose or
shorted terminals or worn insulation.
Incorrect fuse or circuit breaker in
power line.
Install correct fuse or circuit breaker.
Drum motor overheats.
Air circulation through motor restricted. Clean motor fan with compressed air to
restore normal air circulation.
Motor overloaded (SandSmart not
functioning properly).
Have controls inspected and repaired.
Drum motor stalls,
resulting in blown fuses
or tripped circuit.
Short circuit in motor or loose
connections.
Inspect connections on motor for loose or
shorted terminals or worn insulation.
Low voltage.
Correct low voltage conditions.
Incorrect fuse or circuit breaker in
power line.
Install correct fuse or circuit breaker.
Loud, repetitive noise or
vibration coming from
machine.
Fasteners loose.
Inspect fasteners and tighten where needed.
Motor fan is hitting cover.
Tighten fan or shim fan cover.
Machine not level.
Place sander on level floor; shim if needed.
Conveyor motor stalls.
Excessive depth of cut.
Reduce depth of cut; use coarser grit;
reduce feed rate.
Conveyor belt does not
move.
Shaft coupler is loose or unattached.
Adjust shaft coupler.
Conveyor rollers run
intermittently.
Shaft coupling is loose.
Align the shaft flats of the gear motor and
the drive roller and tighten the shaft-coupling
setscrews.
Conveyor belt slips on
drive roller.
Improper conveyor belt tension.
Adjust belt tension.
Excessive depth of cut and/or feed
rate.
Reduce depth of cut and/or feed rate.
Abrasive strip comes off
drum.
Slack in abrasive strip on drum.
Remove slack in strip.
Abrasive improperly wrapped.
Read the section on installing abrasives, and
rewrap.
Abrasive strip is loose.
Strip caught on inside edge of slot, or
on inboard side of drum.
Re-adjust the strip end in the slot and/or trim
the abrasive edge.
Strip not cut properly.
Re-cut and re-install the abrasive strip.
Abrasive loads up
prematurely.
Excessive depth of cut.
Reduce depth of cut.
Excessive feed rate.
Reduce feed rate.
Inadequate dust collection.
Increase airflow at dust port.
Inadequate abrasive.
Use an open-coat abrasive.
Line or groove in stock.
Inconsistent feed rate.
Do not stop or change the feed rate while
feeding stock.
Snipe marks.
Improper tension on rollers.
Re-tension rollers.
