Wire electrode feeding apparatus
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United States of America Patent
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-
Oct 1, 1991
Grant Date -
N/A
app pub date -
Apr 18, 1990
filing date -
Apr 28, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A wire electrode feeding apparatus for an electrodischarge machine uses a motor-driven capstan roller to feed the wire electrode from a bobbin. A pinch roller presses the wire electrode against the capstan roller with a pressure that can be adjusted by a pressure adjusting mechanism. A pre-tension motor applies torque to the bobbin to resist the unwinding of the wire electrode. A control unit adjusts the pressure of the pinch roller and the torque of the pre-tension motor according to the diameter of the wire electrode, so that the wire electrode is not deformed and does not slip or snarl.
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