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W1772/W1773 37" Drum Sander
SERVICE
Drum Adjustments
There are three adjustments for the sanding drums: 1) the
drums must be perpendicular to the feed direction (par
-
allel with the conveyor roller, Figure
49); 2) the drums
must be parallel to the top of the conveyor belt (Figure
54, Page 40); 3) the rear drum must be set approximate-
ly 0.007" to 0.015" below the front drum (Figure 58, Page
41
).
At some point, you may need to readjust the rear drum
parallel to the conveyor if you change the rear drum
height to accomodate for different sandpaper thicknesses
or finish requirements. Make sure the rear drum does not
sit lower than 0.015" below the front drum.
Adjusting Drums Perpendicular to Feed
Direction
The tolerances for having the drum perpendicular to the
feed direction allow up to
1
⁄8" difference from one side
to the other (see Figure
49). If the drums are not per-
pendicular to the feed direction (in other words, parallel
to the conveyor rollers), they may put a side load on the
conveyor belt during operation, forcing the conveyor to
track off to the side and possibly causing damage.
To adjust the drums perpendicular to the feed direc
-
tion, do these steps:
1. DISCONNECT POWER TO THE SANDER!
2. Check to make sure the conveyor roller is parallel to
the machine frame, and make adjustments
if need-
ed. (Refer to Page 36.)
3. Open the top and pulley covers and remove the V-
belts (refer to Page 33 for V-belt removal instruc-
tions).
4. Remove the sandpaper from the drums for best
results.
5. At both ends of the rear drum, measure the distance
between the edge of the rear drum and the rear
upper frame, as shown in
Figure 50. The difference
between these two measurements will tell you how
close the drum is to being perpendicular to the feed
direction (assuming that the conveyor roller is paral
-
lel to the machine frame).
— If the difference between the two measurements
at each end are within
1
⁄8", skip to Step 8.
Figure 49. Drum perpendicular to feed
direction.
Figure 50. Measuring distance between
edge of rear drum and the upper frame
.