Electronic depth controller for EDM apparatus
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United States of America Patent
Stats
-
Apr 9, 1985
Grant Date -
N/A
app pub date -
May 6, 1982
filing date -
May 6, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
EDM apparatus has a servo drive under the control of a main control system for advancing a machining electrode toward a conductive workpiece. When the electrode arrives at a surface of the workpiece to commence EDM machining, the main control system causes a sudden deceleration of the servo. The depth controller detects this sudden deceleration by means of a sensor and sets a zero reference plane from which machining depth is measured. The depth controller can also detect electrode breakthrough by detecting servo acceleration occurring when the electrode breaks through a surface of the workpiece.
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