ADJUSTMENTS
-17-
Oscillation Return
The oscillation return is responsible for keeping
the belt in motion during oscillation.
Figure 16
shows the valve that controls the oscillation
return.
Adjust the oscillation return as follows:
1.
Unplug the power
but keep the air pressure
going into the machine.
2.
Loosen the belt tension and remove the
sanding belt from the sander.
3.
Obstruct the airflow between the air eye
fork (shown in
Figure 17
) with your finger
until the top sanding roller rotates a small
amount then stops.
Oscillation Speed
The valve shown in
Figure 16
controls the speed
of the sanding belt oscillation. For normal oper-
ations, the oscillation speed should be set so
that it takes approximately 2 seconds to move
each direction of travel or a total of 4 seconds
to move both directions.
The oscillation timing
must be balanced before adjusting the speed!
To increase the speed, turn the valve coun-
terclockwise.
To decrease the speed, turn the valve clock-
wise.
After the speed has been set, tighten the jam
nut under the valve knob so it will not move.
Experiment with different speeds to see how the
results may affect your finished product. Often,
you may find that certain speeds yield better
results for different varieties of stock.
Always keep loose
clothing and long hair
secured and away from
moving parts.
Figure 16.
Oscillation speed and oscillation
return control valves.
Figure 17.
Air eye fork.
mately
1
⁄
2
" to the left or right, loosen the
belt tension, recenter the sanding belt on
the rollers and tighten the belt again. Turn
the sanding belt
ON
and repeat this step
until the belt will not stop the sander when
oscillating.
4.
When the belt is oscillating without stop-
ping, loosen the timing knob and slowly
move it until the belt is moving back and
forth in even intervals. Lock the timing knob
to keep the oscillation consistent.
Speed
Return
