Fine Tuning Drum Alignment; Tension Roller Alignment - Jet 22-44OSC Operating Instructions And Parts Manual

Fine Tuning Drum Alignment

Note: This is an operational test. Perform this
alignment after you have become familiar with
sander operation.
When sanding boards wider than the drum,
drum alignment is critical and must be adjusted
exactly level to slightly higher on the outboard
end. This will prevent
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 the end of the board
extends past the end of the drum.
2. Without changing drum height, rotate the
board 180° and sand the same side.
3. If a ridge is visible where the drum overlaps,
loosen the four screws (A, Fig. 22) and raise
the outboard end of the drum by turning the
fine tune adjustment knob (B, Figure 22)
slightly clockwise.
Important: Only turn fine tune adjustment knob
when all four screws (A, Fig. 22) are loose.
4. Repeat this process until the ridge is
eliminated and the entire board is sanded.
5. Tighten the four screws (A, Fig. 23).
Note: Keep track of how many revolutions of the
fine tune knob are needed to change drum
alignment for wider (over 22") sanding. When
sanding narrow stock (less than 22") loosen the
four screws (Figure 22) and turn fine tune
adjustment knob counterclockwise the same
amount as the initial wide sanding so that drum
is again parallel.
Figure 23
any ridges from
17

Tension Roller Alignment

The infeed and outfeed rollers are tensioned to
provide downward pressure on the workpiece to
prevent slippage on the feed conveyor. Tension
rollers are set at the factory, 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 kick-back
of pieces being sanded.
1. Unplug sander from power source and
remove abrasive (D, Figure 24) from drum.
2. Loosen all four hex nuts on the bearing bolts
(E, Figure 24). This will allow both tension
rollers to drop to their lowest position.
(NOTE: Figure 24 only shows outboard end
of drum. Adjustments must be made on both
ends of drum.)
3. Lower sanding drum to where it just contacts
the conveyor bed. Then raise the sanding
drum by making 3/4 turn of the height
adjustment handle.
4. Tighten the four hex nuts (E, Figure 24).
Both tension rollers are now positioned
about 1/16" below the bottom of the sanding
drum.
Figure 24