Jet Tools Drum Sander operating instructions Troubleshooting Operational Problems

Troubleshooting: Operational Problems

Trouble

Ripples in sanded surface.

(Non-uniformly spaced ripples).

Ripples in sanded surface.

(Uniformly spaced ripples).

Sniping of wood (gouging near end of board).

Burning of wood.

Gouging of wood.

Probable Cause	Remedy
Uneven feed rate.	Check for these conditions and refer
	to previous Troubleshooting sections:
	Conveyor belt slips on drive roller.
	Board slips on conveyor belt.
	Conveyor gear motor stalls.
	Set screw loose on shaft coupler
	between gear motor and conveyor.
	Conveyor bushings dry – lubricate.
	Conveyor bushings worn – replace.
Excessive feed rate.	Reduce depth of cut and/or feed rate.
Excessive depth of cut.	Reduce depth of cut and/or feed rate.
	Loose bolts, or loose bearing and
	pulley set screws – re-tighten.
Sander vibration.	Dirty drum – clean inside.
	Drum out of balance – contact your
	dealer or WMH authorized service
	center.
Tension rollers set too low.	Re-set tension rollers.
Stock not supported properly during	Support stock with roller stand, tables
infeed or outfeed.	or benches.
Conveyor drive roller or driven roller	Re-adjust roller(s).
higher than conveyor belt surface.
Feed rate too slow.	Increase feed rate.
Excessive depth of cut for grit used.	Reduce depth of cut or increase grit
	coarseness.
Excess build-up on abrasive strips.	Reduce depth of cut; clean strips or
	replace; angle stock when feeding.
Abrasive is too fine.	Replace with abrasive of coarser grit.
Abrasive strips are overlapped.	Rewrap strip without overlap. See
	pages 11 and 12.
Drum out of alignment.	Re-align drum. See pages 16 and 17.
Conveyor belt is loose.	Adjust conveyor belt tension. See
	page 15.
Excessive depth of cut.	Reduce depth of cut.
Wood slipping on conveyor due to	Use alternate feeding procedure.
lack of contact
Abrasive is too fine.	Replace with coarser grit.

26