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SYMPTOM
POSSIBLE CAUSES AND CORRECTIONS
Machine vibrates excessively
The spring. #28. for the tension mechanism is
elastic fatigued or broken.
Replace with a new spring.
The contact wheel, rubber covered #53, is too
loose.
Tighten the cap screw #52 in the motor shaft
Abrasive belt broken.
Replace with a new abrasive belt.
Bad abrasive belt.
Replace with a new abrasive belt.
Inadequate job on metal
Wrong abrasive belt.
Use aluminum oxide or silicon carbide abrasive
belt not flint or garnet. Refer to page 11.
Sanding marks on work
Abrasive belt too coarse for finish required.
·Use very fine abrasive belt for final finish.
Refer to page 11.
Wrong abrasive belt grit.
·Use coarser grit for stock removal.
Work sanded across grain.
·When surface sanding, use very fine abrasive
belt then finish by hand, working in the direction
of grain.
Abrasive grains quickly rub form belt
Abrasive bond has lost its original properties.
Do not store abrasive belts where it is extreme-
ly dry or where temperatures are extremely
high.
Incorrect storage.
*Be sure to store abrasive belt and do not fold
abrasive belt.
Abrasive belt glazes
Sanding painted surface.
Use open-grain. flint abrasive -- belt.
Refer to page 11 .
Wood is wet or gummy .
No cure.
Work burns
Wrong abrasive belt grit.
Use coarser grit for stock removal.
Feed pressure too great.
*Never force work into steel platen.
Work held motionless.
*Good idea to keep work moving.
Abrasive belt burns. clogs quickly on thickness
sanding
