Conveyor Belt Tension/Tracking; Belt Tension Adjustment; Inspecting Drum Alignment - Jet JWDS 2244OSC M Mode D'emploi

8.4 Conveyor belt tension/tracking
Conveyor belt tension adjustment may be necessary
during the break‐in period to compensate for belt
stretching.
8.4.1 Belt tension adjustment
1. Unplug sander from power source.
2. Adjust take‐up screw (Figure 8‐3) with 5mm hex
wrench. Do this on both sides of conveyor to
obtain approximately equal tension on both
sides of sanding belt when taut.
NOTE: Insufficient belt tension will cause
slippage of conveyor belt on drive roller during
sanding operation. The conveyor belt is too loose
if it can be stopped by hand pressure applied
directly to top of moving conveyor belt.
Excessive belt tension can result in bent rollers,
bent brackets, and/or premature wearing of
bushings or conveyor belt.
Figure 8‐3: belt tension adjustment
8.4.2 Tracking adjustment
A belt tracks correctly when it moves centrally on the
conveyor rollers without drifting to either side.
Tracking adjustments are made while conveyor belt is
running.
1. Unplug sander from power source.
2. Make sure proper belt tension has been
achieved (see sect. 8.4.1).
3. Turn on conveyor and set to maximum speed.
Watch for tendency of conveyor belt to drift to
one side of conveyor. If it drifts, tighten or loosen
take‐up screw.
Note: Adjust take‐up screw only 1/4 turn at a
time. Allow time for belt to react to adjustments
before proceeding further.
Try to avoid over adjustments, as this may affect
belt tension. If tension is affected, if may become
necessary to use both take‐up screws to
accomplish tensioning and tracking.
8.4.3 Trackers
The sander comes equipped with "Trackers", ceramic
guides that reduce the amount of adjustments
needed to keep conveyor belt tracked (centered) on
conveyor table. These guides have a magnetic
backing to keep them in place. If a Tracker wears
through, it can be reversed by turning it over. See
sect. 11.0 Tracker Kit for more information about re‐
setting trackers.
8.5 Inspecting drum alignment
The sanding drum must be parallel to conveyor table
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 straight‐
edge as a gauge.
1. Unplug sander from power source.
2. Open dust cover and remove abrasive strip from
drum.
3. Insert gauge between drum and conveyor table
at outboard side of drum (A, Figure 8‐4).
Figure 8‐4: drum alignment
4. With dust cover open, lower sanding drum while
slowly rotating drum by hand, until drum lightly
contacts gauge. NOTE: Make sure drum contacts
gauge, not just the tension rollers.
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 conveyor table with drum:
7. Loosen both table locking screws (B)
before adjusting drum alignment.
8. Turn knob (C) to raise or lower outboard end of
table. Follow directional marks on label (+ raises,
‐ lowers).
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Loosen both table locks