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. 14, 1998
Filed:
Nov. 02, 1995
Ryuji Suzuki, Yamanashi, JP;
Fanuc Ltd., Yamanashi, JP;
Abstract
A deviation correcting method for a machine tool, which is capable of exactly correcting a deviation of a reference position of a tool with respect to a workpiece without repeatedly executing a measuring operation. The measuring operation includes providing a detector switch SW for detecting an operating end surface of the tool, obtaining a position z when the detector switch SW detects the operating end surface of the tool, and calculating a difference between the detected position z and a reference position z0 to obtain an amount of deviation A. This measuring operation is performed at least three times at an arbitrary time interval. Based on data of these actual measurements, a function f(Ti) of a curve representing a relationship between a time Ti and an amount of deviation A. Then, an amount of deviation A' at an arbitrary time point Ti is estimated using the function f(Ti) to correct a commanded position of the tool. Since the deviation can be corrected by the estimated the amount of deviation A', it is unnecessary to repeatedly executing the measuring operation, thus improving the machining efficiency.