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W1772/W1773 37" Drum Sander
OPERATIONS
Depth of Cut
The optimum depth of cut will vary based on the type of
wood, feed rate, and sandpaper grit. Under most sand
-
ing conditions, the depth should not exceed
1
/64" (approx.
3
/4 turn of the handwheel). Each full turn of the table
height handwheel raises the conveyor table approximately
0.020". Attempts to remove too much material can cause
jamming, wood burning, rapid paper wear or tearing,
poor finish and belt slippage.
To set the depth of cut, do these steps
:
1. Rotate the table height handle (
Figure 24) until the
table is too low, then raise the table, allowing a gap
between the workpiece and the sanding drum.
Note: When adjusting the table to sand a thicker
workpiece, lower and then raise the table to remove
backlash from the adjustment mechanism.
2. Start the conveyor and sanding drums and feed the
workpiece into the sander. SLOWLY raise the con
-
veyor table until the workpiece makes light contact
with the sanding drums. This is the correct height to
begin sanding the workpiece.
Figure 24. Table height handwheel.
Variable Speed
The variable speed knob allows you to increase the feed
rate from 6–18 FPM. The correct speed to use depends on
the type of stock you are using (hardwood vs. softwood)
and the stage of finish you are at with that workpiece.
As a general rule, a slower feed rate will sand the surface
smoother, but runs the risk of burning the wood; a faster
feed rate will remove material faster, but runs the risk of
overloading the motor. Use trial-and-error to determine
the best settings for your specific applications.
To adjust the conveyor speed, do these steps:
1. Start the conveyor (DO NOT adjust conveyor speed
when the conveyor motor is
OFF).
2. Rotate the variable speed knob (Figure 25) counter-
clockwise to increase the feed speed, or clockwise
to decrease the feed speed.
NOTICE
Adjusting the variable speed when the
conveyor motor is
OFF can damage the
V-belt and the adjusting mechanism.
Figure 25. Variable speed knob.