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W1772/W1773 37" Drum Sander
SERVICE
Figure 64. Adjustable idler roller sprocket.
Each tooth on the sprocket represents 0.006" of table
elevation 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.
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 set-
ting.
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 43
).
11. Follow instructions in Drum Adjustments (Refer to
Page 38) for adjusting the drums parallel to the con
-
veyor within 0.002" side-to-side.
Figure 63. Marking sprocket tooth and
chain.
Figure 65.
all models