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W1751 25" Wide-Belt Sander
SERVICE
Figure 33. Gauge boards placed under
pressure rollers.
Pressure Rollers
The pressure rollers are factory set so they are parallel
with each other, parallel with the sanding drum, and
parallel with the surface of the conveyor table.
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!
2. Make two gauge boards that are 37" long and
uniform in thickness.
3. Connect the air pressure and set it to 75 PSI.
4. Install the sanding belt and turn the belt tensioning
knob to tension the belt.
5. Position each board on each side of the conveyor
belt and directly below the front and back pressure
rollers (see
Figure 33).
6. Loosen the adjustment jam nuts and raise the
pressure rollers above the sanding belt roller with
the adjustment bolts shown in
Figure 33.
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
⁄8
th
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.
12. Tighten the adjustment jam nuts.
Adjustment
Locations