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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 25 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 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 27 for more information about
platen positions.
Important: As you sand, observe the amp load
meter (see Figure 35) on Page 29. If the amp
load meter indicates motor overload, slightly lower
the table with the handwheel or reduce the feed
rate (refer to Page 31).
-30-
Use the tables below to determine the approx-
imate maximum depth-of-cut (DOC) for each
of the three conveyor feed rates. After selecting
the appropriate feed rate chart find the grit size
you plan to use. Locate the correct DOC for that
grit by selecting the correct wood hardness of the
workpiece, and note the maximum DOC for the
platen setting (up, even, or down).
Note: These numbers are approximate values
only. They are provided with the intent of giving
you a "ballpark" idea of what to expect for material
removal rates from this machine. Many additional
factors can influence the maximum depth-of-cut
or removal rates that can be achieved with each
pass (i.e. oscillation speed settings, depth-of-
cut taken on previous pass, actual hardness of
workpiece, etc.), so don't be surprised if you
experience slightly different results.
Approximate Max Depth-of-Cut for 15" Stock
16 FPM
Wood Hardness
Grit Size
Hard
Soft
60
0.030"
0.040"
80
0.025"
0.035"
100
0.020"
0.030"
120
*0.015" *0.020"
150
*0.010" *0.015"
180
0.005" *0.010"
240
*0.003" *0.005"
23 FPM
Wood Hardness
Grit Size
Hard
Soft
60
0.025"
0.035"
80
0.020"
0.030"
100
0.015"
0.020"
120
*0.010" *0.015"
150
0.005" *0.010"
180
*0.003" *0.005"
240
*0.002" *0.004"
33 FPM
Wood Hardness
Grit Size
Hard
Soft
60
0.020"
0.030"
80
0.015"
0.025"
100
0.010"
0.015"
120
*0.007" *0.010"
150
*0.005" *0.007"
180
*0.003" *0.005"
240
0.001" *0.003"
*These numbers assume the platen is raised up
during the sanding pass.
Model G0819 (Mfd. Since 09/16)
Platen Settings
Max DOC
Position
n/a
Up 1.5mm
n/a
Up 1.5mm
0.010"
Even
0.010"
Even
0.007"
Even
0.005"
Down 0.5mm
0.002"
Down 1mm
Platen Settings
Max DOC
Position
n/a
Up 1.5mm
n/a
Up 1.5mm
0.007"
Even
0.007"
Even
0.005"
Even
0.002"
Down 0.5mm
0.001"
Down 1mm
Platen Settings
Max DOC
Position
n/a
Up 1.5mm
n/a
Up 1.5mm
0.005"
Even
0.005"
Even
0.003"
Even
0.002"
Down 0.5mm
0.001"
Down 1mm
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