Fine-Tuning Drum Alignment
(for sanding boards wider than the drum)
NOTE: Perform this alignment after you are familiar with sander operation. This is an operational test.
When sanding boards wider than the drum, drum alignment is critical and must be exactly level to slightly high on the outboard end to prevent ridges from forming on the board. Always check this on a piece of scrap wood, as follows, before sanding the work piece.
1.Test alignment with scrap wood roughly 6 inches wide and 20 to 30 inches long. Install abrasive, turn on sander, and pass the board through the sander sideways so that the end of the board extends beyond the end of the drum.
2.Without changing drum height, rotate the board 180° and sand the same side.
3.If a ridge is visible where the drum overlaps, loosen the four screws (A, Figure 27) and raise the outboard end of drum by turning the fine tune adjustment knob (B, Figure 27) slightly clockwise.
4.Repeat process until the ridge is eliminated, and the entire board is sanded.
NOTE: Keep track of how many revolutions of the fine tune knob are needed to change drum alignment for wider (over 16”) sanding. When sanding narrow stock (less than 16”) loosen the four screws (A, Figure 27) and turn fine tune adjustment knob counterclockwise same amount as initial wide sanding until drum is again parallel.
Important: Only turn fine tune adjustment knob when all four screws (A, Figure 27) are loose.
Drum Height Control Adjustment
If the height control mechanism does not operate easily or smoothly, or there is excessive vertical movement or deflection of the drum carriage, perform the following adjustments:
1.With a 1/8” wrench, adjust all four studs by tightening the lock nuts (Figure 28), then loosening them 1/8 to 1/4 turn. If the lock nuts are set too tight, height control will not operate easily. If the lock nuts are too loose, excessive deflection of the outboard end of the drum carriage will result.
2.Apply lubricant to front and rear areas of motor mount slide.
3.Push height adjustment handle (Figure 28) downward to set firmly on housing.
Figure 27
Figure 28
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