Tension Roller Alignment

4.Loosen set screws on collar (Figure 28).

5.Slide collar upward against housing so that all vertical free-play of height adjustment screw is eliminated. An easy method of doing this is to use a block of wood on top of the motor mount slide and under the collar, while lowering the drum with the height adjustment handle. Lubricate around washers beneath handle and above collar.

The infeed and outfeed rollers are tensioned to provide downward pressure on the workpiece to prevent slippage on the feed conveyor. Tension rollers are set at the factory, but should be inspected and may require adjustment as the sander receives use.

Improperly adjusted tension rollers (i.e. those set too high, rendering them non-functional) could allow kick-back of pieces being sanded.

1.Unplug sander from power source and remove abrasive from drum.

2.Loosen all four hex nuts on the bearing bolts (A, Figure 29). This will allow both tension rollers to drop to their lowest position. (NOTE: Figure 29 only shows outboard end of drum. Adjustments must be made on both ends of drum.)

3.Lower sanding drum to where it contacts the conveyor bed. Then raise the sanding drum by making 3/4 turn of the height adjustment handle.

4.Tighten the four hex nuts (A, Figure 29). Both tension rollers are now positioned about 1/16” below the bottom of the sanding drum.

Tension Roller Pressure Adjustment

You can increase or decrease tension roller pressure by turning the screws on the tension roller brackets (B, Figures 29 & 30).

Too much tension roller pressure can result in a “snipe” mark, which is identified as a visible line running across the width of the board and located approximately 2-1/4” from the end of the board.

If the snipe occurs on the leading end of the board, adjust the outfeed tension roller. If the snipe occurs on the trailing end of the board, adjust the infeed tension roller.

Tension roller pressure can also be adjusted by raising the height of the rollers, as follows:

Figure 29

Figure 30