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:
May. 04, 2004
Filed:
Apr. 03, 2003
Yuuji Shirakawa, Yamanashi-ken, JP;
Takuya Yamagata, Yamanashi-ken, JP;
THK Co., Ltd., Tokyo, JP;
Abstract
A machining error correction method corrects error in machining of a work by a tool. The method is adapted for a machine tool that includes a numerical control unit in which a movement amount of the tool is programmed and a tool moving unit that is driven by an instruction signal sent from the numerical control unit and feeds the tool to the work fixed on a work table. The method includes the steps of moving the tool from a program origin to a measurement point provided separately from the program origin by giving a predetermined measurement movement amount to the tool moving unit from the numerical control unit; measuring a positional deviation amount between the measurement position and a tool position after the movement is finished; and correcting a machining movement amount of the tool moving unit using the positional deviation amount when the work is machined.