Filter
Top Products
24
Troubleshooting: Motor and Electrical Problems
Trouble Probable Cause Remedy
Sander will not start.
No incoming power.
Check plug connections. Connect
main cord to power source, and motor
cord into control box receptacle.
Circuit fuse blown or breaker tripped. Replace fuse or re-set breaker.
Switch is malfunctioning. Replace switch.
Drum motor
overloads.
Inadequate circuit. Check electrical requirements.
Feed rate too fast or depth of cut too
large.
Reduce feed rate and/or depth of cut.
Conveyor motor
oscillates.
Motor not properly aligned.
Loosen housing bolts, run motor, re-
tighten bolts.
Transfer rod collar is worn. Replace transfer rod collar.
Drive roller is bent. Replace drive roller.
Drum motor or
conveyor motor
stalls.
Excessive depth of cut.
Reduce depth of cut; use coarser grit;
reduce feed rate.
Improper conveyor belt tension. Adjust tension (see page 15).
Motor overload
protector trips or
shop wiring breaker
trips.
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.
Excessive length or inadequate size
extension cord.
Use a shorter or heavier gauge
extension cord (see Figure 17).
Troubleshooting: Mechanical Problems
Trouble Probable Cause Remedy
Conveyor belt does
not move, or runs
intermittently.
Shaft coupling (#20, page 32) is loose
or unattached.
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 or feed rate.
Reduce depth of cut; reduce feed
rate.
Board slips on
conveyor belt.
Tension rollers too high. Lower tension rollers (see page 18).
Excessive feed rate. Reduce feed rate.
Dirty or worn conveyor belt. Replace conveyor belt.
Abrasive improperly wrapped.
Read “Installing Abrasives” on pages
11-12.