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:
Dec. 07, 1976
Filed:
Apr. 18, 1974
Stanley G Froyd, San Marino, CA (US);
Actron Industries, Inc., Monrovia, CA (US);
Abstract
A system automatically and continuously monitors the performance of separate servomechanisms operating in each of the axes of numerically controlled machine tools to detect when actual machining errors exceed a predetermined maximum due to any malfunction by comparing actual feedback slide velocity, .DELTA.S.sub.2 /T, (as determined by change, .DELTA.S.sub.2, in a feedback position signal, S.sub.2, over a period of time, T) with the commanded system drive velocity, V, (as determined by the difference between commanded position and position feedback signals, S.sub.1 and S.sub.2, respectively, times a gain factor, K). The difference between .DELTA.S.sub.2 /T and K (S.sub.1 -S.sub.2) is machining error which can be used to detect actual error in any axis for alarm or corrective action.