LINK Systems System 1100 Tonnage Monitor - Manual (Page 86)

ZERO CIRCUIT CHECKOUT
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7-2
zeroing threshold. Proceed to step 4 of this procedure.
4) Mechanical noise due to deceleration forces as the machine
slide stops at the end of a stroke that exceed the 5% zeroing
threshold will displace the tonnage display readings obtained
due to tooling forces at the bottom of the stroke. To prevent
this nuisance loss of actual tonnage readings, the zeroing
threshold must be changed to a larger percentage of rated
channel tonnage capacity, or the cam zero (zeroing by
position) option must be used.
The preferred method is to install a cam switch or other limit
switch to determine when the System 1100 zeroes, following the
procedures in section 5.4.3 of this manual.
Alternatively, the zero threshold can be set to 10% of rated
channel tonnage capacity and may eliminate the need for cam
zeroing by elevating the threshold above the mechanical noise
level. This is described in section 2.8.4 of this manual.
After setting the zeroing threshold to 10%, repeat step 3 of
this procedure. If the tonnage displays still change at the
end of the stroke, the cam zeroing option is required. If the
tonnage displays do not change at the end of the stroke,
proceed to step 5 of this procedure.
5) When rate of change zeroing (non-cam zeroing) is used, the
Machine Speed setting in the Config menu must be set
accurately for proper operation of the System 1100 (see
section 2.8.8).