Grizzly G9983 - Manual (Page 30)

-28- G9983 15" Open-End Wide-Belt Sander
Pressure Roller
Depth
Figure 24. These are the pressure roller depth
bolts at the front of the machine. The rear depth
bolts are in the same location at the rear.
Variables such as feed rate, depth of the cut, and
type of sanding belt can play a big part in deter-
mining the proper amount of downward pressure
exerted by the rollers. Some experimentation
may be necessary with pressure roller spring ten-
sion to achieve the desired results. However,
under no circumstances should the pressure
roller depth be set even, or higher than, the sand-
ing rollers or platen.
To adjust the pressure roller depth:
1. Unplug the sander!
2. Joint and plane a 6" W x 36"L piece of wood,
then rip it down the middle. This will give you
two boards that are nearly the exact same
thickness.
3. Place one board along the length of the con-
veyor belt on the right-hand side so it is
directly beneath both front and back pres-
sure roller depth bolts. Place the other board
on the left-hand side so it is directly beneath
both front and back pressure roller depth
bolts.
Figure 24 shows the front left-hand
and front right-hand pressure roller adjust-
ment bolts.
Left-Hand
Pressure
Depth Bolt
Right-Hand
Pressure
Depth Bolt
4. With the air pressure connected, and the
sanding belt installed and tensioned, raise
the pressure rollers above the sanding belt
rollers.
5. Raise the conveyor until the the boards touch
the sanding belt rollers. The rollers should
evenly touch the boards at the same time.
6. Turn the conveyor handwheel counterclock-
wise
1 /
8
th of a turn. This should lower the
conveyor approximately .020" or .5mm.
7. Lower each end of the pressure rollers so
they barely touch the boards. Lock in place.