-36-
W1772/W1773 37" Drum Sander
SE
RV
IC
E
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.38
); 3) the rear drum must be set approximately
0.007" to 0.015" below the front drum (
Figure.58,.Page.
39
).
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 perpendic-
ular to the feed direction (in other words, parallel to the
conveyor rollers), they may put a side load on the convey-
or 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.34.
)
3.
Open the top and pulley covers and remove the
V-belts (refer to
Page.31.
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
.
CORRECT
INCORRECT
Feed Direction
B
=
A
Feed Direction
90˚
(Top View)
Rear Drum
Front Drum
Front Drum
Rear Drum
B
=
A
B
A
B
A
(Up to
1
/
8
" difference allowed side-to side)
Figure.49..
Drum perpendicular to feed
direction.
Figure.50
. Measuring distance between
edge of rear drum and the upper frame.
