Jet Tools Drum Sander - Manual (Page 24)

24
Troubleshooting: Motor and Electrical Problems
Trouble Probable Cause Remedy
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.
Sander will not start.
Switch is malfunctioning. Replace switch.
Inadequate circuit. Check electrical requirements.
Drum motor
overloads.
Feed rate too fast or depth of cut too
large.
Reduce feed rate and/or depth of cut.
Motor not properly aligned.
Loosen housing bolts, run motor, re-
tighten bolts.
Transfer rod collar is worn. Replace transfer rod collar.
Conveyor motor
oscillates.
Drive roller is bent. Replace drive roller.
Excessive depth of cut.
Reduce depth of cut; use coarser grit;
reduce feed rate.
Drum motor or
conveyor motor
stalls.
Improper conveyor belt tension. Adjust tension (see page 15).
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 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.
Improper conveyor belt tension. Adjust belt tension.
Conveyor belt slips
on drive roller.
Excessive depth of cut or feed rate.
Reduce depth of cut; reduce feed
rate.
Tension rollers too high. Lower tension rollers (see page 18).
Excessive feed rate. Reduce feed rate.
Dirty or worn conveyor belt. Replace conveyor belt.
Board slips on
conveyor belt.
Abrasive improperly wrapped.
Read “Installing Abrasives” on pages
11-12.