Jet Tools Drum Sander guide

Troubleshooting: Motor and Electrical Problems

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.

	Probable Cause	Remedy

		Check plug connections. Connect
	No incoming power.	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.

	Inadequate circuit.	Check electrical requirements.

	Feed rate too fast or depth of cut too	Reduce feed rate and/or depth of cut.
	large.	Reduce feed rate and/or depth of cut.
	large.

	Motor not properly aligned.	Loosen housing bolts, run motor, re-
	Motor not properly aligned.	tighten bolts.
		tighten bolts.

	Transfer rod collar is worn.	Replace transfer rod collar.

	Drive roller is bent.	Replace drive roller.

	Excessive depth of cut.	Reduce depth of cut; use coarser grit;
	Excessive depth of cut.	reduce feed rate.
		reduce feed rate.

	Improper conveyor belt tension.	Adjust tension (see page 15).

	Excessive load on sanding drum and	Allow motor to cool and re-set
	motor.	overload button.

		Connect sander to a dedicated circuit.
	Too many tools on circuit.	Have a certified electrician correct
		any shop wiring problem.

	Excessive length or inadequate size	Use a shorter or heavier gauge
	extension cord.	extension cord (see Figure 17).

Trouble	Probable Cause	Remedy

Conveyor belt does	Shaft coupling (#20, page 32) is loose	Align the shaft flats of the gear motor
not move, or runs	Shaft coupling (#20, page 32) is loose	and the drive roller and tighten the
not move, or runs	or unattached.	and the drive roller and tighten the
intermittently.	or unattached.	shaft-coupling setscrews.
intermittently.		shaft-coupling setscrews.

Conveyor belt slips	Improper conveyor belt tension.	Adjust belt tension.

		Reduce depth of cut; reduce feed
on drive roller.	Excessive depth of cut or feed rate.	Reduce depth of cut; reduce feed
	Excessive depth of cut or feed rate.	rate.
		rate.

	Tension rollers too high.	Lower tension rollers (see page 18).

	Excessive feed rate.	Reduce feed rate.
Board slips on
Board slips on	Dirty or worn conveyor belt.	Replace conveyor belt.
conveyor belt.	Dirty or worn conveyor belt.	Replace conveyor belt.
conveyor belt.

	Abrasive improperly wrapped.	Read “Installing Abrasives” on pages
		11-12.