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Model G0866 (Mfd. Since 11/18)
Workpiece
Inspection
Some workpieces are not safe to cut or may
require modification before they are safe to cut.
Before sanding, inspect all workpieces for
following:
•
Material Type: This machine is intended for
sanding natural and man-made wood prod-
ucts. This machine is NOT designed to sand
metal, glass, stone, tile, plastics, drywall,
cement backer board, laminate products, etc.
Sanding improper materials increases risk of
respiratory harm to operator and bystanders
due to especially fine dust inherently created
by all types of sanding operations —even
if a dust collector is used. Additionally, life
of machine and sanding belts will be great-
ly reduced (or immediately damaged) from
sanding improper materials or from exposure
to fine dust created when doing so.
•
Foreign Objects: Nails, staples, dirt, rocks
and other foreign objects are often embed-
ded in wood. While sanding, these objects
can become dislodged and tear sanding belt.
Always visually inspect your workpiece for
these items. If they can't be removed, DO
NOT sand workpiece.
•
Wet or "Green" Stock: Sanding wood with
a moisture content over 20% causes unnec-
essary clogging and wear on sanding belt,
increases risk of kickback, and yields poor
results.
•
Excessive Warping: Workpieces with exces-
sive cupping, bowing, or twisting are danger-
ous to sand because they are unstable and
unpredictable when being sanded. DO NOT
use workpieces with these characteristics!
•
Minor Warping: Workpieces with slight cup-
ping can be safely supported if cupped side
is facing table. On the contrary, a workpiece
supported on bowed side will rock during
sanding, and could cause kickback or severe
injury.
Sanding Workpieces
The sanding process is influenced by the feed
rate, sanding depth, grit size and material type of
sandpaper, platen position, and oscillation speed.
We strongly recommend that you experiment with
these variables, or research best practices for
achieving your desired sanding results with the
type of material you have. Also, to avoid unnec-
essary wear on belts, always make sure the
workpiece has been surface planed with a jointer
or planer before sanding.
Typically, no more than 0.020" (one full rotation of
handwheel) of material should be removed during
a single sanding pass. The maximum sanding
depth can also be influenced by the thickness of
the sanding belt, which can vary from 0.010" (fine
sandpaper) to 0.060" (coarse sandpaper).
Attempts to remove too much material at one
time can cause jamming, wood burning, rapid
sandpaper wear or tearing, poor finish, short
motor life, and belt slippage. The operator usually
makes a pass, raises the table a little, and repeats
until the entire surface is sanded to satisfaction.
Before sanding, ensure you review
Workpiece
Inspection on Page 33 and put on the required
safety glasses and respirator.
Note: It may take more than one pass to achieve
the full sanding depth.
The overall sanding process consists of the
operator starting sanding with the platen in the
up position with a coarse grit sandpaper, such as
#60, and then repeating this for subsequent grit
sizes from #80–#100 until the workpiece is evenly
smooth.
The operator then sets the platen level with the
drums using the platen height components (see
Figure 48) and performs intermediate sanding
passes using #100–#150 grit sandpaper. For the
final sanding pass, the operator sets the platen in
the down position and sands the workpiece using
#180 grit or finer sandpaper. Refer to
Adjusting
Platen on Page 36 for more information about
platen positions.
Summary of Contents for G0866
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