Inspecting Drum Alignment; Tension Roller Adjustment - Powermatic PM2244 Operating Instructions Manual

reversed by turning it over. See sect. 11.0 Tracker
Kit for more information about re-setting trackers.
Figure 12

7.4 Inspecting drum alignment

The sanding drum must be parallel to conveyor bed
for proper machine operation. The sanding drum
comes pre-aligned from the manufacturer. If a
problem with drum alignment should occur, follow
the instructions below.
First, inspect the alignment with a gauge of some
kind. The following procedure uses a steel block as
a gauge.
1. Unplug sander from power source.
2. Open dust cover and remove abrasive strip
from drum.
3. Insert gauge (A, Figure 13) between drum and
conveyor bed at outboard side of drum.
Figure 13
4. With dust cover open, lower sanding drum
while slowly rotating drum by hand, until drum
lightly contacts gauge.
5. Remove gauge and place under drum at
inboard side.
6. If drum does not contact gauge equally on both
ends of drum, alignment is needed.
To align drum:
7. Turn adjustment dial (B, Figure 13) to raise or
lower outboard end of table. Follow directional
marks on dial (+ to raise).
7.4.1 Verifying drum alignment
Note: This is an operational test. 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
150mm wide by 700mm to 1000mm 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
dial (B, Figure 13).
4. Repeat this process until the ridge is eliminated
and entire board is sanded.
TIP: Place a mark on adjustment dial to keep track
of how much dial rotation is needed to change
drum alignment for wider (over 559mm) sanding.
When sanding narrow stock (less than 559mm) turn
dial opposite direction the same amount as the
initial wide sanding so that drum is again parallel.

7.5 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.
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 14).
11
Improperly adjusted tension