NOTE: Keep track of how many revolutions of the fine tune knob are needed to change drum alignment for wider (over 22”) sanding. When sanding narrow stock (less than 22”) loosen the four screws (Figure 22) and turn fine tune adjustment knob counterclockwise the same amount as the initial wide sanding so that drum is again parallel.
Tension Roller Alignment
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
1.Unplug sander from power source and remove abrasive (D, Figure 24) from drum.
2.Loosen all four hex nuts on the bearing bolts (E, Figure 24). This will allow both tension rollers to drop to their lowest position. (NOTE: Figure 24 only shows outboard end of drum. Adjustments must be made on both ends of drum.)
3.Lower sanding drum to where it just 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 (E, Figure 24). 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 (Figure 25).
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
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 24
Figure 25
18
