air pressure switch
Air Pressure Safety
Switch
depth of cut safety bar
Adjusting Depth Of
Cut Safety Bar
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 |
Minimum Air |
Pressure |
Adjustment |
Screw & Scale |
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/cm2, which is adjusted with the related adjust- ment screw.
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.
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 SANDER FROM POWER!
4.Open the sanding belt access door and remove the sanding belt from the sander.