Grizzly G0866, Owner'S Manual, Page: 39 / 100

Model G0866 (Mfd. Since 11/18)
-37-
However, we do not recommend lowering the
platen depth more than 2mm (about one complete
knob turn) or over-using the platen by expecting it
to remove marks beyond its ability to do so, since
this can reduce the life of the sanding belt and
platen, and result in premature streaking.
Tip: Given the short life-span of most graphite
pads, it is a good idea to keep replacement pads
on hand.
Platen Up: The platen is raised above the level
of the drums (typically set at 1.5mm UP), so
only the sanding drums are making contact with
the workpiece. This position is typically used
for heavy sanding passes or dimensioning. The
drums do all the work, but you will have a rough
finish. Typically platens are used in this position
with #100 or coarser grit.
Platen Even: The platen is set level with the
drums. This position is used for intermediate-fin-
ishing passes. The depth of cut should not exceed
0.010". This position typically uses #100–#150
grit.
Platen Down: The platen is set below the level of
the drums so it is the primary contact point while
performing finish sanding.
The platen should be lowered to 0.2 to 0.5mm
(maximum) below the sanding drums, but not
more than 0.2mm per pass. You can lower the
platen up to 2mm below the drums for short inter-
vals, but streaking, burn marks, and premature
graphite/platen wear can occur if this setting is
abused or over-used.
It is not necessary to use the table height
handwheel or Table Up button to adjust the sand-
ing depth during the final sanding pass—the
platen movement alone will take care of the depth
of cut. Typically the final-sanding pass position
uses #180 or finer.
Note: The platen scale is broken down in 0.1mm
increments (approximately 0.004").
If workpiece has straight notches across it,
graphite cloth and felt have worn out and
need to be replaced.
Changing Feed Rate
As a general rule, slower feed rates are more
beneficial than faster feed rates since they allow
a given belt the time it takes to remove more
material. We recommend you always start with
the slowest feed rate and only increase the feed
speed as needed to meet your sanding goals. Be
sure to always test the feed rate using scrap wood
similar to your workpiece.
Softwoods typically require a faster feed rate than
hardwoods; however, there is no definitive rule to
follow when determining the best feed rate to use
for any type of wood.
Also, keep in mind that an increase in feed rate
will increase the amperage load for a given sand-
ing depth. This means you need to use shallower
sanding depths at higher feed rates to avoid over-
loading the sanding motor.
The conveyor belt is variable-speed, and is
controlled by the knob located on the front of the
feed belt gearbox (see
Figure 56).
Conveyor Feed Rate .......................... 7-68 FPM
To change feed rate:
1. Turn conveyor belt ON. Conveyor belt must
be running to adjust feed rate.
2. Turn knob clockwise to increase feed rate.
Turn knob counterclockwise to decrease feed
rate.
Note: Turn knob in
1
⁄
4
" increments.
Figure 56. Feed rate adjustment knob.
Feed Rate
Adjustment
Knob