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26
Troubleshooting: Operational Problems
Trouble Probable Cause Remedy
Ripples in sanded
surface.
(Non-uniformly
spaced ripples).
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.
Ripples in sanded
surface.
(Uniformly spaced
ripples).
Excessive feed rate. Reduce depth of cut and/or feed rate.
Excessive depth of cut. Reduce depth of cut and/or feed rate.
Sander vibration.
Loose bolts, or loose bearing and
pulley set screws – re-tighten.
Dirty drum – clean inside.
Drum out of balance – contact your
dealer or Walter Meier authorized
service center.
Sniping of wood
(gouging near end of
board).
Tension rollers set too low. Re-set tension rollers.
Stock not supported properly during
infeed or outfeed.
Support stock with roller stand, tables
or benches.
Conveyor drive roller or driven roller
higher than conveyor belt surface.
Re-adjust roller(s).
Burning of wood. 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.
Gouging of wood.
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
lack of contact
Use alternate feeding procedure.
Abrasive is too fine. Replace with coarser grit.