Installing/Mounting
4.6 Idler alignment procedure
18
Milltronics WD600
Operating Instructions, 09/2016, A5E38964753_A
B
5. Make sure there is at least 13 mm (½") of clearance between the return belt and the WD600.
– In some conveyors, it may be necessary to install a return idler roller adjacent to the scale
to deflect the return belt past the scale.
6. Position the scale so that it is parallel to the conveyor and square to the stringer.
– Place the weighdeck on the top load cell mount.
– Level the weighdeck and tighten the bolts sufficiently to keep the load cell mount pads in
place until final adjustment.
NOTICE
Off-center or off-square installation can result in poor belt tracking and scale
inaccuracy.
4.6
Idler alignment procedure
Establishing good idler alignment is the most important part of the installation procedure. Scale
accuracy is directly affected by alignment.
Note
Improperly aligned idlers could cause unwanted forces to be applied to the weighbridge,
resulting in calibration and measurement errors.
1. Remove the shipping stops to free the weighing mechanism.
– Keep the screws stored in a convenient place for use during maintenance or at other
times when protection of the cells is necessary.
2. Align and level the weighbridge in the weighing area by raising or lowering the load cell
mount pads in their slots.
– The weighing area includes the scale and the approach and retreat idlers/sliders. For
conventional flat idler roll conveyors, two additional idler rolls should be included in the
alignment procedure.
3. Align and level the idlers (pans on a slider pan conveyor) in the weighing area by shimming
the scale deck, the two approach idlers, and the two retreat idlers, until they are within ± 0.8
mm (1/32") of each other.
– Be sure to check that the idlers are centered and squared to the conveyor during the
shimming process.
