Aligning Pressure Rollers - Grizzly G0458Z Owner's Manual

Aligning
Pressure Rollers
Two spring-loaded pressure rollers help maintain
consistent pressure on the workpiece as it passes
the sanding drum. The pressure rollers have been
set correctly at the factory. DO NOT adjust the
pressure rollers unless absolutely necessary.
When properly positioned, the pressure rollers
should be approximately 0.004" lower than the
drum.
Adjusting the pressure rollers is a fine balance
between too much pressure and not enough. Too
much pressure can cause problems like snipe
or overloading the motor. Not enough pressure
may allow the workpiece to kick out of the sander
towards the operator.
Items Needed
Wrench 8mm ......................................................1
Hex Wrench 4mm ...............................................1
Gauge Blocks (see Page 36) .............................2
Feeler Gauge Set ...............................................1
To check pressure rollers:
1. DISCONNECT MACHINE FROM POWER!
2.
Place gauge blocks on feed belt as shown in
Figure 48.
Figure 48. Example of gauge blocks placed
under drums.
-38-
3.
Raise table until blocks just touch the rear
pressure roller.
4.
Find the largest size feeler gauge that can
pass between sanding drum and your gauge
block. (The feeler gauge should slide with
moderate resistance, without forcing drum to
roll.)
—If gap is 0.004" (0.1mm) or less, then no
adjustment of rear pressure roller is neces-
sary.
— If gap is more than 0.004" (0.1mm), then
rear pressure roller must be adjusted.
5. Raise table until gauge blocks just touch the
drum.
6. Find the largest size feeler gauge that can
pass between the front pressure roller and
your gauge block. (The feeler gauge should
slide with moderate resistance, without forc-
Qty
ing the drum to roll.)
— If the gap is 0.004" (0.1mm) or less, then
no adjustment of front pressure plate is
necessary.
— If the gap is more than 0.004" (0.1mm),
then front pressure plate must be adjusted.
To adjust rear pressure roller:
1.
DISCONNECT MACHINE FROM POWER!
2.
Loosen hex nut securing tensioner cap
screws on both ends of rear pressure roller
shown in Figure 49.
Pressure
Roller Pivot
Bar
Figure 49. Rear pressure roller adjustments.
Pressure Roller
Cap Screw
(1 of 2)
Hex Nut
Model G0458Z (Mfd. Since 7/19)