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-34-
G0644 15" Open-End Wide Belt Sander
Air Pressure Safety
Switch
The sanding motor safety brake and the sanding
belt oscillation system require at least 57 PSI of
air pressure connected to the machine to oper
-
ate correctly. The air pressure safety switch (see
Figure 36
) measures the amount of air pressure
flowing into the machine. If there is not adequate
air pressure, the air pressure safety switch will not
allow power to flow to the sander.
The air pressure safety switch was calibrated
and set at the factory and should not require any
further adjustment. However, we recommend that
you verify the settings.
The red pointer on the sensitivity scale should be
set at "0" on the scale, which is adjusted with the
sensitivity adjustment screw shown in Figure 36.
The left minimum air pressure scale should read 4
kg/cm
2
, which is adjusted with the related adjust-
ment screw.
air pressure switch
Adjusting Depth Of
Cut Safety Bar
When properly adjusted, prevents the operator
from exceeding the maximum depth depth of cut.
The position of this safety bar (see Figure 37
)
was factory set at approximately
3
⁄64" (0.047")
above the lowest point of the sanding drum. We
recommend that this safety bar remain at this set
-
ting.
To adjust the depth of cut safety bar to the
factory setting:
1. Make sure the sanding drum and conveyor
are parallel (
Page 32).
2. Sand a 15" wide piece of stock until it is flat.
3. DISCONNECT THE SANDER FROM
POWER!
4. Open the sanding belt access door and
remove the sanding belt from the sander.
Figure 37. Depth of cut safety bar.
Hex Bolts
depth of cut safety bar
Figure 36. Air pressure safety switch.
Minimum Air
Pressure
Adjustment
Screw & Scale
Sensitivity Scale
Sensitivity Adjustment Screw