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7.
Precise idler alignment is very important if maximum accuracy of the weighing
system is to be achieved. Misaligned idlers will result in unwanted forces being
applied on each idler in the weighing area, causing calibration and measurement
errors. Use a good quality wire or string to check for alignment. The wire or string
must be able to withstand sufficient tension in order to eliminate any sag. Adjust
shims so that all rolls of the A2 through to the R2 idlers are in line within 0.8 mm
(1/32").
wire or string
(for alignment)
Although the accepted tolerance for idler alignment is ± 0.8 mm (1/32"), the scale
mounted idler should never be lower than the adjacent idlers. Establishing good
idler alignment is the most important part of the installation procedure. Scale
accuracy is directly affected by alignment.
7ML19985DR02
Milltronics MMI Belt Scale – INSTRUCTION MANUAL
A 2
approach idlers
A 1
S 1
MSI with
modified scale
idler
S 2
R 1
retreat idlers
R 2
Page 9
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