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. 10, 2016
Filed:
Nov. 20, 2014
Fanuc Corporation, Yamanashi, JP;
Kouki Kameta, Yamanashi, JP;
FANUC CORPORATION, Yamanashi, JP;
Abstract
A servo controller having a function for reducing an amount of dropping of a gravity axis provided with a machine. The Servo controller is configured to control a servomotor for driving a gravity axis of the machine, and includes a brake signal outputting part configured to output a brake activation signal and a brake release signal to a mechanical brake for holding the gravity axis; a torque command generating part which generates a torque command value for controlling the position of the servomotor; and a torque limiting value generating part which generates a torque limiting value for limiting the torque command value. The torque limiting value generating part continuously reduces the torque limiting value from a first value larger than a torque corresponding to the gravity force to a second value smaller than the torque corresponding to the gravity force, after the brake activation signal is output.