1.8 Sanding operations
To surface sand a workpiece:
① Make sure the sander is turned OFF and the sanding drum is completely
stopped.
② Make sure that the correct sandpaper grit is properly installed on the drum.
③ Inspect the workpiece and make sure it is acceptable for the sanding operation.
④ Place the workpiece flat on the conveyor belt and under the sanding drum.
⑤ Lower the sanding drum until it matches the greatest height of the workpiece.
Note: Make this adjustment so that the first passes will take off just the high spots
of the workpiece.
⑥ Remove the workpiece from the conveyor belt, then turn the sander ON and
adjust the conveyor feed rate so that it is correct for the operation.
⑦ Stand to the left of the conveyor belt to avoid the hazards of kickback, place it
on the conveyor belt at the correct angle, then allow the belt to feed it under the
sanding drum.
⑧ When the sanding drum has complete control of the workpiece, step to the rear
of the sander, and maintain control and support of the workpiece as it leaves the
sanding drum on its own.
⑨ Without changing the depth-of-cut setting, rotate the workpiece 180°
horizontally and pass it through the sander again.
⑩ Increase the depth of cut by the correct amount, then repeat Steps 7–10 with
progressively finer grits until you have produced the desired results.
When the sanding operation is complete, turn the sander OFF.
11
1.9 Conveyor Belt Tension & Tracking
The conveyor belt tension and tracking must be properly adjusted to ensure that
the workpiece correctly and safely passes underneath the sanding drum and that
the conveyor belt does not become damaged during operation. If the conveyor belt
slips on the rollers then the belt tension needs to be increased. If the conveyor belt
moves to one side or the other when it is running, then the belt tracking needs to
be adjusted.
1.9.1 Belt tension
① Make sure the conveyor belt is centered on the rollers.
— If it is not, release the belt tension equally on both sides of the belt. This is done
by holding the hex nut stil while rotating the Phillips head screw counterclockwise