Craftsman 315.117280 Operator's Manual page 11

TO ADJUST SANDING BELT TRACKING
See Figures 5 - 6.
Belt life is greatly increased if you regularly adjust the
sanding belt tracking. When correctly adjusted, the outer
edge of the sanding belt should be even with the outer
edge of the base of the sander.
When you install a new sanding belt, you may need to
adjust the sanding belt tracking several times until the belt
becomes conditioned.
Follow these steps to adjust sanding belt tracking.
WARNING:
Before connecting the sander to a
power supply, always make sure it is not in the
"locked-on" position. Failure to do so could result in
accidental starting of the sander resulting in possible
serious injury.
n Connect the sander to a power supply.
n Position the sander upside down with the cord on the
left.
NOTE: This position is for adjustments only. The sand-
ing belt should not contact a workpiece or any foreign
object when you are making belt tracking adjustments.
n Depress the trigger switch and release immediately.
Observing any sideways movement of the belt.
OPERATION
n Choose one of these options:
n Sanding belt runs inward: Turn the tracking knob
slowly clockwise.
n Sanding belt runs outward: Turn the tracking knob
slowly counterclockwise.
NOTE: Turn the tracking knob until you are sure the
sanding belt is secure, i.e., it will not come off the
sander or contact internal parts.
CAUTION:
the inner edge, it is probably adjusted too far inward
and is rubbing against internal parts. If this is the
case, readjust the tracking knob.
n Start the sander and fine adjust the tracking knob until
the belt stabilizes.
WARNING:
moving sanding belt. Any part of the body coming
in contact with a moving sanding belt could result in
serious injury. Do not wear loose clothing or jewelry
when operating the sander. They could get caught in
moving parts and foreign objects could get thrown
away from the sander causing injury.
TURN COUNTERCLOCKWISE IF
BELT RUNS OUTWARD
TURN CLOCKWISE IF BELT
Fig. 5
11
If the sanding belt wears excessively on
Keep hands and fingers away from a
RUNS INWARD
Fig. 6