Air Pressure Safety Switch; Adjusting Depth Of Cut Safety Bar - Grizzly G0644 Owner's Manual

air pressure switch
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.
Sensitivity Adjustment Screw
Sensitivity Scale
Figure 36. Air pressure safety switch.
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 , which is adjusted with the related adjust-
2
ment screw.
-34-
Minimum Air
Pressure
Adjustment
Screw & Scale
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
above the lowest point of the sanding drum. We
recommend that this safety bar remain at this set-
ting.
Hex Bolts
Figure 37. Depth of cut safety bar.
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
POWER!
4.
Open the sanding belt access door and
remove the sanding belt from the sander.
G0644 15" Open-End Wide Belt Sander
depth of cut safety bar
⁄ " (0.047")
3
64
SANDER FROM