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Trouble Probable Cause Remedy
Conveyor rollers run
intermittently.
Shaft coupling loose.
Align shaft flats of gear motor and
drive roller, and tighten shaft coupling
set screws.
Abrasive strip is overlapped. Re-wrap abrasive strip (page 12-13)
Abrasive is loaded. Clean abrasive.
Depth of cut excessive for fine grit.
Use coarser grit or reduce depth of
cut.
Feed rate too slow. Increase feed rate.
Sander burns wood.
Abrasive is worn. Replace abrasive.
Improper conveyor belt tension. Adjust belt tension (page 16).
Conveyor belt slips
on drive roller.
Excessive depth of cut and/or feed
rate.
Reduce depth of cut and/or feed rate.
Tension rollers too high. Lower tension rollers (see page 19).
Excessive feed rate. Reduce feed rate.
Board slips on
conveyor belt.
Dirty or worn conveyor belt. Replace conveyor belt.
Improper conveyor belt tension.
Adjust belt tension. If necessary,
reduce depth of cut and/or feed rate.
Sander motor slows
or stalls.
Excessive depth of cut and/or
excessive feed rate.
Reduce depth of cut or feed rate.
A. Uneven feed rate.
Conveyor belt slipping (see above)
Board slips on conveyor belt (see
above).
Conveyor motor stalls (see above).
Ripples in sanded
surface.
A. Non-uniformly
spaced ripples.
B. Uniformly spaced
ripples.
B. Conveyor bed flexing or vibration.
Reduce depth of cut and/or feed rate.
Check for loose bolts, loose shaft
coupling set screws, or out-of-balance
drum.
Stock slipping on conveyor. Correct depth of cut or roller tension.
Wood is gouged.
Work piece not properly supported.
Add work supports for long work
pieces.
Table height
adjustment works
improperly.
Improper adjustment of height control.
Readjust height control. See pages
18-19.
Excessive load on sanding drum and
motor.
Allow motor to cool and re-set
overload button.
Too many tools on circuit.
Connect sander to a dedicated circuit.
Have a certified electrician correct
any shop wiring problem.
Motor overload
protector trips or
shop wiring breaker
trips.
Excessive length or inadequate size
extension cord.
Use a shorter or heavier gauge
extension cord (see Figure 19).