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:
Jan. 25, 1983
Filed:
May. 07, 1980
Jean-Pierre Kruth, Heverlee, BE;
Ateliers des Charmilles, S.A., Geneva, CH;
Abstract
An EDM apparatus provided with an adaptive self-correcting system for achieving optimum maximum efficiency of machining operations. As the machining performance factor or index of an EDM apparatus continuously varies as a function of one of the machining parameters as, for example, the cut-off time interval between consecutive electrical discharges, such that the maximum performance index, achieved for a given optimum cut-off time interval, deteriorates rapidly when the cut-off time interval is shortened, thus resulting in poor and unstable machining conditions, the invention contemplates varying the cut-off time interval in successive steps, the steps being larger when operating along the negative slope portion of the representative curve of the performance index as a function of the cut-off time interval duration, and the steps being much smaller when operating within the portion of the representative curve having a positive slope. In addition, the invention contemplates reducing the steps to a much smaller value within a buffer or safety zone in the portion of the representative curve of negative slope proximate to the top of the curve.