Woodstock W1751 - Manual (Page 17)

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W1751 25" Wide-Belt Sander
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Pressure Roller Depth and Alignment
To reduce snipe, double check the pressure roller depth
adjustment. The front and rear pressure roller should be
approximately 0.3-0.5mm below the level of the sanding
drum.
To adjust the pressure rollers, do these steps:
1. DISCONNECT THE SANDER FROM POWER, but keep
the air pressure coming in.
2. Make two gauge boards that are 24" long and are of
a uniform thickness.
3. Tension the sanding belt.
4. Place each board on each side of the conveyor belt
so that they are positioned directly below the front
and back pressure rollers as shown in Figure 10.
5. With the adjustment bolts shown in Figure 10, raise
the pressure rollers above the sanding belt roller
position.
Note: The pressure roller adjustment bolts can be
locked/unlocked with the recessed setscrews in
the head of the bolt. For the rear pressure rollers,
these bolts are located in the same position on the
back side of the machine.
6. Make sure that the platen is even with the sanding
belt rollers.
7. Raise the table up until the boards barely touch the
sanding belt, and mark the table handwheel position
with a piece of tape or chalk.
8. Turn the table handwheel counterclockwise 1 ⁄
8th
of a
turn, this will lower the table approximately 0.4mm.
9. Now lower the front and rear pressure rollers so that
both ends barely touch the boards.
Note: The pressure rollers should now be prop-
erly set between 0.3-0.5mm below the sanding
drum. Keep in mind that roller tension, besides
roller depth, will also affect the feeding opera-
tions.
Figure 10. Pressure roller height
adjustment locations and gauge boards
installed.