-42-
W1772/W1773 37" Drum Sander
SE
RV
IC
E
Figure.64.
Adjustable idler roller sprocket.
8.
Fit the chain back over the sprocket,
making sure the new sprocket tooth is
inserted into the marked chain hole.
9.
Re-tension the chain and check the
new height setting.
10.
Repeat
Steps. 5–9
as needed until the
table height is parallel to the drums in
all four corners, and calibrate the scale
pointer (refer to
Page.41
).
11..
Follow instructions in
Drum.Adjustments
(Refer to
Page. 36
) for adjusting the
drums parallel to the conveyor within
0.002" side-to-side.
Figure.63.
Marking sprocket tooth and
chain.
Table.Lift.Scews
The table lift screws are connected by a chain and driv-
en by the table elevation handwheel. When the chain is
removed from a sprocket on one of the lift screws, that
lift screw can adjust that portion of the table up/down
independently to assist in setting the table parallel to the
drums.
Adjusting the table lift screws will only be necessary if
you need to adjust the drum heights more than allowed
at the pillow bearing adjustments, or if you have removed
the table or chain during a service procedure and you
need to reset the drums parallel to the table.
Each tooth on the sprocket represents 0.006" of table ele-
vation movement. For example, if the rear of the table
was 0.006" low, rotate both rear table lift screws to the
next sprocket tooth in the same chain position. You can
easily rotate the sprockets from the top of the table lift
screws with a flat head screwdriver.
After adjusting the table lift screws, check to make sure
the drums and conveyor are parallel within 0.002" from
one side to the other. If they are not within this range,
then additional fine adjustments should be made at the
drum pillow bearings.
To.adjust.the.table.lift.screws,.do.these.steps:
1..
DISCONNECT POWER TO THE SANDER!
2.
Open the side cover.
3.
Raise the table up to at least the 1" mark on the
height scale.
4.
At the lift screw that needs to be adjusted, mark the
end of a sprocket tooth and the chain hole where that
tooth is meshed, as shown in
Figure.63
.
5.
Using two 14mm wrenches, loosen the adjustable
idler roller (
Figure.64
).
6.
Carefully move the chain off of only the marked
sprocket.
7.
Keep track of the marked chain hole and rotate the
sprocket the necessary number of teeth away from
the marked one to meet the difference in height
needed.
