Wire electrical discharge machine and control method of wire electrical discharge machine
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United States of America Patent
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Aug 23, 2022
Grant Date -
Jun 25, 2020
app pub date -
Dec 23, 2019
filing date -
Dec 25, 2018
priority date (Note) -
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Abstract
A wire electrical discharge machine for machining a workpiece by generating electric discharge at a discharge gap between the workpiece and a wire electrode includes: a machining current setting unit for setting the magnitude of a normal machining current depending on the discharge gap state at application of a discharge induction voltage at the previous time or previous times; and a machining current control unit configured to control a main discharge circuit so as to supply the normal machining current to the discharge gap when the present discharge gap state is the normal state, control the main discharge circuit so as to supply a short-circuit machining current smaller than a predetermined current to the gap when the discharge gap state is the short-circuited state, and control the main discharge circuit so as not to supply any machining current to the gap when the discharge gap state is the open state.
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