LINK Systems System 1100 Tonnage Monitor - Manual (Page 96)

USING SYSTEM 1100 TONNAGE MONITORS
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9-5
die location and tonnage, the location and required tonnage is
ideally recorded and attached to the die set as a reference
for future setup and for determining die wear.
The high and low setpoint limits should then be determined for
each channel. The high setpoints for each channel should be
set far enough above each channel tonnage that normal
variations in tonnage don't trip the high setpoint alarms.
The low setpoint alarms should be set far enough below each
channel tonnage that normal variations in production tonnage
don't trip the low alarms. The combination of the high and
low setpoint alarms provides a tonnage "tolerance", helping to
assure parts quality. Out of tolerance hits warn of problems
in the production process. A good starting point in the
determination of high and low setpoint limits for a channel is
about 10% above the average tonnage displayed by the System
1100 for that channel over several strokes for the high
setpoint, and about 10% below the average tonnage for the low
setpoint.
High and low setpoints should be set symmetrically above and
below the operating tonnage respectively. The tonnage bar
graphs should then light the middle GREEN bar graph segments
on all channels. This symmetrical setting of setpoints can be
performed automatically by the System 1100 through the use of
the Auto Setup function. The Auto Setup function sets the
high, low and reverse setpoint limits to a preset tolerance