Wire electrode breakage detection method and apparatus

Details Wire electrode breakage detection method and apparatus Wire electrode breakage detection method and apparatus

1985-05-30

1989-08-29

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324556, 324537, 219 69W, G01R 3100

Patent

active

048620955

ABSTRACT:
A method and apparatus for detecting breakage of a wire electrode in an electric discharge machining apparatus, and an apparatus for carrying out this method, whereby breakage of the wire electrode is detected by detecting a change in a current from a detection power source provided separately from the main power source. Current from the detection power source is applied through the wire electrode by a roller in contact therewith. When the wire electrode is unbroken, current passes from the detection power source, through the wire electrode, to an optical coupling circuit, the secondary of the latter driving and indicating circuit. When the wire electrode breaks, the power flow to the primary of the optical coupling circuit is interrupted, thereby indicating breakage of the wire electrode.

REFERENCES:
patent: 4015102 (1977-03-01), Zadorozny
patent: 4365654 (1982-12-01), Viniczay et al.

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