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:
Mar. 20, 2007
Filed:
Nov. 30, 2005
Tomonori Sato, Tokyo, JP;
Eiji Hayashi, Tokyo, JP;
Yuji Mizukami, Tokyo, JP;
Toshiyuki Muraki, Aichi, JP;
Akira Iseki, Aichi, JP;
Tomonori Sato, Tokyo, JP;
Eiji Hayashi, Tokyo, JP;
Yuji Mizukami, Tokyo, JP;
Toshiyuki Muraki, Aichi, JP;
Akira Iseki, Aichi, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Yamazaki Mazak Corporation, Aichi, JP;
Abstract
An NC apparatus controls a position of a tool by driving a plurality of shafts with a plurality of servomotors. The shafts includes at least one clamp shaft that can be mechanically clamped or non-clamped. A clamp determining unit determines whether a state of the clamp shaft and outputs a signal based on the state. A correcting unit corrects a position instruction value or a position detection value of at least one shaft other than the clamp shaft based on the signal and a correction value so as to cancel an error in a position of the tool due to movement of the tool performed by the clamp shaft.