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:
Oct. 08, 2019
Filed:
Jul. 24, 2017
Applicant:
Dmg Mori Co., Ltd., Yamatokoriyama-shi, JP;
Inventors:
Masamitsu Nakaminami, Yamatokoriyama, JP;
Masahiro Fujiki, Yamatokoriyama, JP;
Seiichi Fukuzono, Isehara, JP;
Assignee:
DMG MORI CO., LTD., Yamatokoriyama-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 23/14 (2006.01); H02P 31/00 (2006.01); B23Q 17/00 (2006.01); B23Q 17/10 (2006.01);
U.S. Cl.
CPC ...
H02P 23/14 (2013.01); B23Q 17/007 (2013.01); B23Q 17/10 (2013.01); H02P 31/00 (2013.01); B23Q 17/003 (2013.01); H02P 2203/00 (2013.01);
Abstract
A machine tool is provided capable of detecting an abnormality caused by detaching a spindle. The machine tool includes: the spindle configured to rotate a workpiece or a tool; a sensor configured to output a signal according to a rotation angle of the spindle; and a controller configured to detect occurrence of an abnormality in at least one of the spindle and the sensor when an electrical signal different from the signal output during each of rotation of the spindle and halt of the spindle is output from the sensor.