Oscillation Timing
NOTICE
The oscillation adjustments have been per- formed at the factory and should require no further attention. However, we recommend verifying the settings.
When the oscillation is correctly adjusted, the sanding belt oscillates to the left and to the right at the same speed. If the sanding belt makes contact with a limit switch, as shown in Figure 26, the emergency braking system will activate and stop the sander immediately.
Limit
Switches
Sanding Belt
Sander Outline
(Top View)
Figure 26. Improper oscillation.
To check the sanding belt oscillation:
1.Be sure the sanding belt is properly installed and the belt tension knob and air supply are ON.
2.Turn ON the sanding belt.
G0486/G0487 Wide Belt Sander
3.An adequate stream of air through the air fork gap (Figure 27) is essential for proper oscillation. If the jet of air is weak through the gap, the belt will track away from the controller and into the limit switch on the opposite end of the roller. The pivot action of the upper roller, and the resulting oscillation of the belt, are dependent upon adequate airflow through the air fork gap.
Oscillation Controller Gap
| Air Fork and Air Jet |
| Figure 27. Oscillation components. |
To set the correct amount of airflow through | |
the air fork gap: | |
1. | Remove the sanding belt then turn the belt |
| tension knob to the tensioned position. |
2. | Loosen the lock nut on the airflow adjustment |
| knob (Figure 28). |
3. | Turn the airflow adjustment knob (Figure 28) |
| clockwise until the airflow is completely OFF. |
| The upper roller should pivot to the right. |
4. | Slowly turn the airflow adjustment knob |
| counterclockwise, and continue turning up |
| the air pressure until the roller pivots to the |
| left. |
| Lock Nut |
