Method and apparatus for controlling a press

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100 43, 100 50, 100 99, 364476, 364550, 36455101, B30B 1526, G06F 1900

Patent

active

054916470

ABSTRACT:
A process controller disposed to monitor and control a press. The controller monitors an appropriate variable at the press representative of the force produced at the workpiece upon which the press is operating, and compares this force to historical force data associated with the position at which the force was sampled. The historical data is stored in the form of control arrays, where the control arrays are calculated based upon one or more signature arrays stored during satisfactory press operations upon a similar workpiece. The calculation of the control arrays takes into account the deviations in the variables monitored at the press, which may include force and position. While monitoring the press based upon the HIGH and LOW control arrays, each force value is compared to the values in the HIGH and LOW control arrays at the time of sampling. The press controller is configured to monitor and control a high speed press and provides control functions during the particular press cycle in which unacceptable sample is taken.

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