Tension Roller Adjustment; Operations; Drum And Conveyor Motor Operation - Jet JWDS-2244OSC-M Gebrauchsanleitung

9. Retighten table lock screws (B).
8.5.1 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
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.
If a ridge is visible where the drum overlaps,
3.
loosen both table locks (B, Figure 8‐4) and lower
table at outboard end slightly by turning knob
(C).
4. Repeat this process until the ridge is eliminated
and entire board is sanded.
Note: When sanding narrow stock (560mm or less),
return conveyor table to parallel position. Turn knob
opposite direction until lock nut (D, Figure 8‐4) is
contacted. The lock nut provides a positive stop for
table parallelism.
8.6 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 of roller on
outboard side by inserting screwdriver through holes
in plate (Figure 8‐5) and turning screws on the
tension roller brackets. The plate can be removed for
easier access. The screws at inboard side of drum can
be adjusted in similar manner.
Figure 8‐5: 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
60mm 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 Operations
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 Drum & conveyor motor operation
1. Connect power supply to machine.
2. Disengage emergency stop by clockwise turning
the red button or pulling it up (A, Figure 9‐1).
Note: Error Indicator (D, Figure 9‐1) may flash
continuously to remind that the conveyor speed dial
is NOT set at OFF position before starting the
operation. The control system is designed to prevent
the conveyor belt from being activating accidentally.
If conveyor belt motor doesn't work, turn the dial (C,
Figure 9‐1) to OFF and re‐dial.
3. Turn on the On/Off switch (B) to start drum
motor.
4. Rotate conveyor speed dial (C) clockwise to start
and increase speed of conveyor.
13