LINK Systems System 1100 Tonnage Monitor - Manual (Page 92)

9-1
There are several possible levels of utilization of System 1100
Tonnage Monitors in everyday production operations. In addition,
there are several special purpose and diagnostic uses that a System
1100 can perform. This section of the manual gives suggestions for
using the System 1100. The information provided should be
considered as guidance. As the operator gains familiarity with the
System 1100, he should develop tonnage monitoring programs that
best fit his needs.
9.1 Machine Overload Monitoring
The least complex use of a System 1100 Tonnage Monitor is as a
monitor for machine overload. Many mechanical power presses and
other machines are chronically operated in severely overloaded
conditions because of improper matching of tooling to machine
capacity, because tooling wear increases the tonnage required to
produce a part, because of improper shut height adjustment, or
because tooling is improperly positioned in the machine.
Overloading drastically increases bearing wear, deflection, and
breaking of load bearing structures on machine tools.
When used as a machine overload monitor, the high setpoint limits
for each channel of the System 1100 are chosen and set so that any
load which exceeds rated machine tonnage capacity, or, at the
employer's discretion, up to 125% of rated capacity, will cause the
System 1100 to generate a high setpoint alarm and prevent another
stroke until the System 1100 alarm is cleared. This prevents
operation of the machine when die setting procedures, tooling wear,
improper location of dies etc., cause the machine to be overloaded.
Using the System 1100 only as a machine overload monitor requires
the lowest level of operator and die setter involvement with the
tonnage monitor. High setpoint limits, once chosen, are not reset
and low setpoint limits can be turned off or set to zero.
During die setting, the die setter must interact with the tonnage
monitor only if the dies, as set, produce an overload. During
production operation, an overload alarm alerts the operator to
determine and remove the cause of the overload.
9.1.1 Sample Die Setting Instructions
1) Follow normal die setting procedures, setting dies and making
trial strokes with material in place while slowly decreasing
shut height on mechanically driven (crankshaft) machines or
Section 9. Using System 1100 Tonnage Monitors