Oscillation Return
The oscillation return keeps the sanding belt in motion. The valve shown in Figure 22 controls the oscillation return.
Air Eye
Fork
Oscillation
Return
Valve
Figure 22. This is the oscillation return valve
and the air eye fork.
To adjust the oscillation return:
1.Turn off all power to the sander, but keep air pressure going into the machine. Lower the belt and slide it out of the way of the eye fork.
2.Block the airflow between the eye fork until the top roller rotates to one side and does not return.
3.With the airflow still blocked, loosen the jam- nut on the valve knob and tighten the knob to close the valve.
4.Now clear the eye fork so the air will flow between it again. Watch the top roller and slowly open the valve.
5.When the top roller begins to move, open the valve another 1Ú4 to 1Ú2 turn of the knob. Tighten the jamnut. DO NOT open the valve more than needed or there will be excessive pressure on the air system.
Limit Switches
The limit switches are mounted on both sides of the sanding belt. They are designed to stop the sander if the belt travels too far to one side of the top roller.
The limit switches are factory set and should require no adjustments. However, if they stop working correctly, they move during adjustments, or they get replaced, proper adjustments will be required.
To adjust the limit switches:
1.Center the sanding belt on the top roller. Measure the distance between the edge of the sanding belt and the limit switch lever. This distance should be approximately 1Ú2". If this measurement is different, then loosen the adjustment bolts shown in Figure 23 on the incorrect side.
2.Slide the mounting bracket in the necessary direction until there is a 1Ú2" gap between the edge of the belt and the limit switch lever.
3.Tighten the adjustment bolts to secure the mounting bracket. Test the sander to verify that operation returns to normal.
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G9983 15" | ||||||