SMC Networks System 5000 - Manual (Page 28)

April 17, 2000 Man ual Versio n 1.0
4.4
For cushions this should be the maximum operating pressure specified by the
cushion manufacturer.
For hydraulic overloads this value should be the pressure specified by the press
manufacturer for rated tonnage operation.
Min. Pressure This value should be set to the minimum operating pressure at which you will
operate your counterbalance, cushion, or hydraulic overload.
For counterbalances, this value is the pressure that balances the slide with no
tooling and cannot be set below 5 psi. Obtain this value from the press
counterbalance table or press manual.
For cushion(s), the Min. Pressure should be set to at least the value that just barely
supports the weight of the cushion cylinder. This can be found by slowly
increasing the pressure to the cushion until it just starts to rise. Then back off the
pressure until it just starts to fall. The Min. Pressure should be set to at least the
average of the two pressures. The Type “B” and “C” valve systems may be used
to provide a minimum pressure through their manual regulator. This keeps the
cushion from falling due to air leakage when the control is powered off and
prevents cushion pins from falling through the lower die shoe and bolster.
NOTE! Cushions can always drift down when the plant air supply is off.
Also, If a type “B” valve is used, Min Pressure must be set above the manual
regulator setting.
For hydraulic overloads, the Min. Pressure should generally not be set to less than
25% of the Max. Pressure value.
Max. Die Weight This parameter only appears when a counter balance is being configured.
This should be set at the die weight the counterbalance handles at its maximum
pressure. Obtain this value from the press counterbalance table or press manual.
Note that the units to the right of this parameter are also configurable. When the
editing cursor is placed on these units, softkey 1 will read “CHANGE UNIT”.
When pressed, pounds, kilograms, tons, or metric tons may be selected from a list.
Note that changing the unit here will also change the unit for Min. Die Weight.
Min. Die Weight This parameter only appears when a counter balance is being configured.
Set this value to 0 die weight. (This represents no tooling on the upper slide at the
minimum counterbalance pressure). Note that the units to the right of this
parameter are also configurable. When the editing cursor is placed on these units,
softkey 1 will read “CHANGE UNIT”. When pressed, pounds, kilograms, tons,
or metric tons may be selected from a list. Note that changing the unit here will
also change the unit for Max. Die Weight.
Display Weight As This parameter only appears when a counter balance is being configured.
Set this parameter to the units that die weight should be displayed in. The choices