Troubleshooting: Motor And Electrical Problems; Troubleshooting: Mechanical Problems - Jet Drum Sander Operating Instructions And Parts Manual

Troubleshooting: Motor and Electrical Problems

Trouble
Sander will not start.
Drum motor
overloads.
Conveyor motor
oscillates.
Drum motor or
conveyor motor
stalls.
Motor overload
protector trips or
shop wiring breaker
trips.

Troubleshooting: Mechanical Problems

Trouble
Conveyor belt does
not move, or runs
intermittently.
Conveyor belt slips
on drive roller.
Board slips on
conveyor belt.
Probable Cause
No incoming power.
Circuit fuse blown or breaker tripped.
Switch is malfunctioning.
Inadequate circuit.
Feed rate too fast or depth of cut too
large.
Motor not properly aligned.
Transfer rod collar is worn.
Drive roller is bent.
Excessive depth of cut.
Improper conveyor belt tension.
Excessive load on sanding drum and
motor.
Too many tools on circuit.
Excessive length or inadequate size
extension cord.
Probable Cause
Shaft coupling (#20, page 32) is loose
or unattached.
Improper conveyor belt tension.
Excessive depth of cut or feed rate.
Tension rollers too high.
Excessive feed rate.
Dirty or worn conveyor belt.
Abrasive improperly wrapped.
Remedy
Check plug connections. Connect
main cord to power source, and motor
cord into control box receptacle.
Replace fuse or re-set breaker.
Replace switch.
Check electrical requirements.
Reduce feed rate and/or depth of cut.
Loosen housing bolts, run motor, re-
tighten bolts.
Replace transfer rod collar.
Replace drive roller.
Reduce depth of cut; use coarser grit;
reduce feed rate.
Adjust tension (see page 15).
Allow motor to cool and re-set
overload button.
Connect sander to a dedicated circuit.
Have a certified electrician correct
any shop wiring problem.
Use a shorter or heavier gauge
extension cord (see Figure 17).
Remedy
Align the shaft flats of the gear motor
and the drive roller and tighten the
shaft-coupling setscrews.
Adjust belt tension.
Reduce depth of cut; reduce feed
rate.
Lower tension rollers (see page 18).
Reduce feed rate.
Replace conveyor belt.
Read "Installing Abrasives" on pages
11-12.
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