Jet Drum Sander Operating Instructions And Parts Manual page 25

Trouble
Conveyor belt tracks
to one side, or
oscillates from side to
side.
Abrasive strip is
loose.
Abrasive loads up
prematurely.
Table height
adjustment works
improperly.
Knocking sound while
running.
Probable Cause
Conveyor belt out of adjustment.
Drive or driven roller needs adjusting.
Conveyor belt worn or defective.
Drive roller worn, bent, or varies in
diameter side to side.
Roller bushings elongated due to
excessive wear.
Strip caught on inside edge of slot, or
on inboard side of drum.
Strip not cut properly.
Excessive depth of cut.
Excessive feed rate.
Inadequate dust collection.
Inadequate abrasive.
Stock fed at 90° angle to drum.
Improper adjustment of height control.
Bearing(s) out of alignment.
Dust in drum.
Set screws loose in pulley or bearing.
Abrasive fastener on drum loose
(without abrasive strip in place).
Drum bearing(s) worn.
Remedy
Readjust conveyor belt; see page 15.
Readjust; see page 16.
Replace conveyor belt; see pages 15
and 16.
Replace drive roller.
Replace bushings.
Re-adjust the strip end in the slot
and/or trim the abrasive edge.
Re-cut and re-install abrasive strip.
See pages 11 and 12.
Reduce depth of cut.
Reduce feed rate.
Increase airflow at dust port.
Use an open-coat abrasive.
Angle stock 60° if possible to avoid
resin line buildup.
Readjust height control. See pages
19.
Re-align bearings.
Remove material inside drum.
Re-tighten set screws.
Insert abrasive strip, or replace
fastener.
Replace drum bearing(s).
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