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. 15, 2019
Filed:
Aug. 27, 2018
Applicant:
Fanuc Corporation, Yamanashi, JP;
Inventor:
Zhizhen Xia, Yamanashi-ken, JP;
Assignee:
FANUC CORPORATION, Yamanashi, JP;
Primary Examiner:
Int. Cl.
CPC ...
B23Q 16/10 (2006.01); F16D 55/22 (2006.01); F16D 66/00 (2006.01); F16D 121/06 (2012.01);
U.S. Cl.
CPC ...
B23Q 16/105 (2013.01); F16D 55/22 (2013.01); F16D 66/00 (2013.01); B23Q 2220/004 (2013.01); F16D 2066/006 (2013.01); F16D 2121/06 (2013.01);
Abstract
In a method of controlling a rotary table device, a clamp mechanism drive unit is controlled to unclamp a brake disk. Thereafter, a pressure of working fluid supplied to an unclamp fluid chamber is decreased, and a motor drive unit is controlled to rotate a motor. Then, the abrasion quantity of the piston and the clamp member is calculated based on a reference pressure and a pressure when the load torque of a spindle exceeded a reference load torque.