Wire contact/noncontact boundary position detecting apparatus of wire cut discharge machine
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United States of America Patent
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May 30, 2006
Grant Date -
Feb 12, 2004
app pub date -
Jun 18, 2003
filing date -
Aug 6, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
Supply of a wire electrode, application of a detection voltage, and binarization and sampling of the detection voltage are started, so as to start advance of the wire electrode from the position A toward a workpiece. The position of the wire electrode when a sampling value (low level) is detected for the first time is designated as a position B, and the wire electrode is advanced from this position by a predetermined distance P1, and is stopped at a position C. Retreat of the wire electrode is started from the position C, and a position Q where the sampling value has changed from the high level to the low level is stored as a contact/noncontact boundary position. Further, retreat of the wire electrode is continued, and the wire electrode is stopped at a predetermined separating position D, to thereby finish the processing.
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