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8.4.1
Fine-Tuning Drum Alignment
Note: This is an operational test for sanding boards
wider than the drum. Perform this procedure only
after you have become familiar with sander
operation.
When sanding boards wider than the drum, table
alignment is critical and table must be adjusted
exactly level to slightly lower on the outboard end.
This will prevent any ridges from developing in the
stock. Always check this on a piece of scrap wood,
as follows, before sanding the work piece.
1. Run a piece of scrap wood approximately 6”
wide by 30” to 40” long through the sander
sideways so that end of board extends past
outboard side of drum.
2. Without changing drum height, rotate board
180° and sand the same side.
3. If a ridge is visible where the drum overlaps,
lower table at outboard end slightly by turning
knob (C, Figure 8-3).
4. Repeat this process until the ridge is eliminated
and entire board is sanded.
Note:
When sanding narrow stock (less than 16”),
return conveyor table to parallel position. Turn knob
opposite direction until lock nut (D, Figure 8-3) is
contacted. The lock nut provides a positive stop for
table parallelism.
8.5
Tension Roller Adjustment
The infeed and outfeed rollers are tensioned to
provide downward pressure on the workpiece to
prevent slippage on the feed conveyor. Tension
rollers have been set by the manufacturer but
should be inspected and may require adjustment as
the sander receives use.
Improperly adjusted tension
rollers (i.e. those set too high, rendering them
non-functional) could allow kickback of pieces
being sanded.
You can increase or decrease tension roller
pressure by turning the screws on the tension roller
brackets (Figure 8-4).
Figure 8-4: Tension Adjustment Screws
Too much tension roller pressure can result in a
“snipe” mark, which is a visible line running across
the width of the board and located approximately 2-
1/4” from end of board.
If snipe occurs on the leading end of board, adjust
outfeed tension roller. If the snipe occurs on trailing
end of board, adjust infeed tension roller.
9.0
Operation
Before using your drum sander, review the previous
sections on initial set-up and adjustment. Before
operating, make sure an abrasive strip is mounted
and a proper dust collection system is connected.
9.1
On/Off Switch (Sanding Drum)
For the On/Off Switch to work, you must insert the
Safety Key (see Figure 9-1). To start drum, pull
paddle switch upward. To stop drum, push switch
down. This switch operates sanding drum only. The
conveyor is controlled separately (see Figure 9-1).
To prevent unauthorized use of sander, push switch
OFF and remove the Safety Key (Figure 9-1). Store
key in a safe place. You must reinsert the Safety
Key to start sander.
NOTE:
Conveyor belt can still
operate with the key removed.
Figure 9-1: Controls and Safety Key
9.2
Oscillation Mode
You can operate the sander with sanding drum in
fixed position or in oscillation mode. The top switch
(Figure 9-1) activates oscillation mode.
NOTE: If changing from oscillation mode to fixed
mode, allow drum to center itself over conveyor
before turning off oscillation mode.
If a power outage occurs, all
functions currently active will restart when
power is restored. For safety, if an outage
occurs immediately shut off sander switch and
conveyor dial.
