Powermatic WB-25, WB-37, WB-43 operating instructions Oscillation Air Flow, Oscillation Speed

may result in incorrect tracking. If this occurs, the oscillation timing can be set to compensate.

1.Adjust oscillation while the machine is running. Turn on the air valve switch and press the sanding belt start button (see Figure 19).

2.The upper roller will pivot left and right. The duration of the sanding belt’s oscillation to the right side and to the left should be equal. For example, if the oscillation time to the right is one second, then the oscillation time to the left should also be one second.

3.If the oscillation time to the right side is one second, but the oscillation time to the left side is longer, then loosen the tracking adjustment lever (rotate it counterclockwise) and move it to the left until proper timing is achieved. See Figure 7.

4.When finished, tighten the tracking adjustment lever.

5.If the oscillation time to the left side is one second, but the oscillation time to the right side is longer, then loosen the tracking adjustment lever and move it to the right until proper timing is achieved. Tighten the tracking adjustment lever.

9.2Oscillation Air Flow

For correct sanding belt oscillation, there must be adequate air flow through the holes of the oscillation bracket (Figure 8). When the sanding belt is operating, its edge will pass over the holes in the oscillation bracket. The blocked air flow will cause a sensor to activate the tracking cylinder, which pivots the upper roller and shifts the belt back out, causing it to leave the air flow. This process will continually repeat itself.

If there is inadequate air flow, the sanding belt will track too far and contact a limit switch. Adjust the air flow using the air flow control knob (Figure 9). Loosen the jam nut and rotate the knob clockwise to decrease air flow, counterclockwise to increase air flow. Tighten the jam nut to lock the setting.

Frequently inspect the holes in the oscillation bracket – make sure they are clean and clear of obstructions.

9.3Oscillation Speed

To adjust the speed of the oscillation, loosen the jam nut on the speed control knob (Figure 9), then turn knob clockwise to decrease oscillation speed or counterclockwise to increase oscillation speed. When finished, tighten jam nut.

Figure 7

Figure 8

Figure 9

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