Idler Alignment; Alignment Procedure - Siemens milltronics Instruction Manual

Idler Alignment

Precise alignment is very important to achieve maximum accuracy of the weighing
system. Improperly aligned idlers could cause unwanted forces to be applied to the
weighing idler, resulting in measurement errors.

Alignment Procedure

1. Remove the shipping stops to free the weighing mechanism.
• Keep the stops and 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 idler in the weighing area by raising or lowering the static beam
in its mountings.
• The weighing area includes the scale and at least one idler on each side of the
scale. For conventional flat idler roll conveyors, two additional idler rolls should
be included in the alignment procedure.
3. Adjust idlers (idlers and pans on a slider pan conveyor) vertically until they are all
within ±0.8 mm (1/32") of each other.
• Stretch a line across the top surface of each idler roll in the scale area at
approximately 25 mm (1") from each end of each idler roll.
• Use good quality wire (0.5 mm [0.020"] diameter) or equivalent nylon line to
check for alignment. The wire or string aligning lines must be able to withstand
sufficient tension to eliminate sag in the line.
4. Check that the idlers are centered and squared to the conveyor as in step 5 of the
installation procedure.
5. Tighten the static beam mounting bolts (34 to 40.8 Nm or 25 to 30 ft lbs).
6. Carefully lower the conveyor belt onto the scale and fixed idlers.
7. Run the conveyor for at least fifteen minutes to limber the belt prior to calibration.
Front View
25mm TYP . (1")
(both sides)
Page 6 Milltronics MLC Belt Scale – INSTRUCTION MANUAL
aligning wire
(customer supplied)
.
7ML19985FF01