Method and apparatus for automatically positioning a press machine slide
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United States of America Patent
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Nov 25, 2003
Issued Date -
N/A
app pub date -
May 20, 2002
filing date -
Feb 29, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A control system enables a press operator to selectively position the slide at a specific resting location corresponding to an absolute dimension of the slide travel path, such as an angular measure relative to the top dead center position of the press machine crankshaft. A programmable limit switch module manages the operation of a brake-clutch combination by commanding a clutch control circuit to actuate disengagement of the clutch at the proper moment so that the slide will subsequently come to rest at the selected resting location. The module includes a programmable limit switch connected to a press speed resolver and a dedicated on-board processor configured to receive the speed data. The processor collects the speed data using a polling operation having very low scan time.
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