5.With the straightedge along the edge which is low, loosen the knurled locking nut and turn the tracking knob while watching the gap change between the straight edge and the roller. Make small changes and check for a change in gap on the opposite side.
6.When the gap has been equalized between the two sides, make sure the center of the roller, or the crown, is still approximately flush or just slightly above the platen sur- face. Lock the adjustment knobs with the locking knobs.
7.Reinstall the belt. Move the belt by hand (DO NOT turn on the power). If the belt tracks to one side or the other, adjust the idler roller slightly by backing off the locking knobs and turning the knurled adjustment screws in or out. See Figure 16. Make very small adjustments and move the belt by hand for a few revolutions to test the result. Keep readjusting until you are satisfied the belt is tracking properly when moved by hand.
8.Lock the adjustment in place by tightening the knurled lock knobs on both adjusters.
Locking Knobs
Tracking Knobs
Figure 16. Belt arm adjuster knobs.
9.Test the tracking by cycling the machine on and off very quickly. See if the belt stays centered during this test cycle. If the belt doesn’t remain centered on the rollers, it must be adjusted further.
Moving sanding discs and belts are danger- ously abrasive. Use extreme caution when working near sanding surfaces. Failure to exercise care while sanding could result in severe injury.
G1183/1276 Combination Sander |
