LINK Systems System 1100 Tonnage Monitor - Manual (Page 100)

USING SYSTEM 1100 TONNAGE MONITORS
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9-9
caused the alarm cleared before pushing the CLEAR key on the
System 1100 and proceeding with production.
4) If high or low alarms trip frequently in the production
process and no apparent cause is found, nuisance alarms may be
taking place because normal variations in the production
process occasionally cause tonnage to fall somewhat below low
setpoint limits or somewhat above high setpoints on any
channel showing the high or low setpoint alarm with the actual
tonnage reading for the channel and reset the low or high
setpoint if necessary.
5) If the press will not stroke and an error occurs (indicated by
a flashing STOP CIRCUIT indicator light) on the System 1100,
call the supervisor.
9.3 Intermediate Load Monitoring
An intermediate load monitoring program that is somewhat more
complex than simple overload monitoring but doesn't require the
record keeping suggested in the comprehensive load monitoring
program can provide many of the benefits of comprehensive load
monitoring. The lack of recorded reference values to tonnage and
die location primarily makes it more difficult to assess tooling
wear, but in some instances the die setter's memory may compensate
for lack of records.
9.3.1 Sample Die Setter Instructions
1) Move the keyswitch to the BYPASS position to turn off all
high, low and reverse setpoint limits.
2) Follow normal die setting procedures, making trial strokes
with material in place and adjusting tonnage slowly upwards by
shut height adjustment of mechanically driven machines or
hydraulic pressure on hydraulic machines. After each trial
stroke, observe the tonnage on each channel of the System 1100
Tonnage Monitor. Shift the die location to obtain
approximately equal tonnages on each channel, or as near to
equal tonnages on each channel as possible when feeding, part
removal, part transfer, or die design prevents the obtaining
of approximately equal tonnage on each channel.
Use the TOTAL tonnage reading on the System 1100 to set the