Powermatic 31A - Manual (Page 10)

10
3. Make final adjustments to the tracking by
momentarily starting and stopping the motor while at the
same time adjusting the tracking screw (F), Figure 5, at
the side of the belt arm. To lock the screw in place,
rotate the tracking screw locking nut (G) against the belt
arm.
PLATEN ADJUSTMENT
Due to wear, occasionally the platen may have to be
readjusted. To do this, proceed as follows:
Swing the end guard out of position and remove the side
guard. Loosen the two hex screws (A) on the opposite
side of the belt arm and adjust the platen. See Figure 7.
The platen should be 1/32” to 1/16” above the tangent
points of the pulleys and in contact with the belt at both
ends. A straight edge can be used with the belt to align
the platen.
SANDING TABLE ADJUSTMENT
The sanding table may be adjusted from any angle from
15 degrees up to 45 degrees down. To adjust, loosen the
lock wheels (A) on both sides and pivot table to the
desired angle as shown on the trunnion scale (B). Re-
tighten the lock wheel (A). See Figure 8.
A 45-degree stop (C) is located under the table. Check
the angle of the table against the stop to make sure it is
45 degrees. If it is not, adjust by loosening the hex nut
and screwing the stop in or out as needed. Re-tighten
hex nut.
A zero-degree stop (D) is located behind the disc. See
Figure 9. The block should be set for quick placement of
the table to the 0 position (90 degree table). The block
must be swung out of position for the table to be tilted
downward. If major adjustment of the zero-degree stop is
necessary, loosen the socket head cap screws (E) to
raise or lower the bracket. For fine adjustment, loosen
the hex nut (F) and turn the screw in or out as needed.
Re-tighten hex nut (F).
Periodically check zero position on the table by using a
combination square. The angle between the table and
disk should be 90 degrees when the trunnion pointer is at
zero
WORK STOP
Your sander is equipped with a work stop for use with the
belt arm in the horizontal position (see Figure 17). When
installed, the work stop will prevent a work piece from
being thrown from the belt. If removed for through-
sanding, the work stop should be immediately reinstalled
after the through-sanding operation (unless the fence
attachment is used in its place for 45-degree or vertical