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ADJUSTMENTS
-20-
Diagonal Belt
Tracking
The diagonal belt tracking for your Model W1688
Edge Sander has been setup at the factory; how-
ever, due to shipping or long use of the sander,
the belt can begin to track diagonally. You can
compensate for this normal condition by adjust-
ing the roller support bracket. See Figure 30.
To adjust the diagonal belt tracking, do these
steps:
1. Unplug the edge sander.
2. Loosen the belt tracking lock knob. See
Figure 31.
3. With the sander unplugged, loosen the two
3
⁄8"-16 X 1
1
⁄2" cap screws. See Figure 32.
4. While you rotate the sanding belt in the
counterclockwise operating direction, alter-
nately adjust the four Allen
®
set screws to tilt
the idler roller and roller support bracket
inward or outward in very small increments.
See Figure 32. By tilting the idler roller this
way, the belt will track horizontally.
5. When the belt tracking is not diagonal and is
horizontal, tighten the the two cap screws.
See Figure 32.
6. Tighten the belt tracking lock knob.
7. Rotate the belt a few more times to make
sure the belt stays in the normal operating
position. If it does not, repeat steps 1
through 7.
Figure 32. Roller block bracket and Allen
®
set
screws.
Figure 31. Belt tracking lock knob and belt
tracking knob.
Figure 30. Diagonal belt tracking.
Keep your machine
unplugged during all
assembly, adjustments,
or maintenance proce-
dures. Otherwise serious
personal injury may
occur!
Idler Roller
Support
Bracket
Allen
®
Set Screw
Cap Screw
Belt Tracking Lock Knob
Belt Rotation