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. 24, 2015
Filed:
Oct. 18, 2012
Okuma Corporation, Aichi, JP;
Tomohiro Shibata, Aichi, JP;
Tomohisa Kameyama, Aichi, JP;
OKUMA Corporation, Aichi, JP;
Abstract
A machine tool includes a main axisto which a touch probeis attached, a motorthat rotationally drives the main axis, a rotation angle position detectorthat detects a rotation angle position of the motor, and a control device. The control device, when a measurement mode command for performing measurement of a workpiece by the touch probeis input, multiplies a d-axis current command value Idc by a d-axis current correction coefficient K that is less than 1 to reduce the d-axis current command value Idc to a d-axis current command correction value Idc', using a d-axis current command correction section. Thus, in the machine tool, small rotation vibrations of the main axis, generated when rotating the main axis to which the probe is attached and performing measurements of a workpiece, can be suppressed to thereby increase the measurement accuracy.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile