The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 1985
Filed:
Jul. 16, 1982
Mitsuo Matsui, Tokyo, JP;
Teruyuki Matsumura, Hachioji, JP;
Fanuc Ltd., Minamitsuru, JP;
Abstract
Disclosed is a method of controlling backward movement in an electric discharge machine wherein a workpiece is subjected to electric discharge machining by moving an electrode and the workpiece across which a voltage is applied, relative to one another. The method comprises a step of detecting a state of the electric discharge machining in response to a retraction command, a step of selecting a class corresponding to the electric discharge machining state from among a plurality of stored classes of retraction control information items indicating retraction control conditions different from one another, and a step of relatively moving and controlling the electrode and the workpiece in the backward direction in accordance with the selected class of retraction control information items.