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:
Apr. 14, 1992
Filed:
Aug. 20, 1990
Ryuji Iijima, Narashino, JP;
Seiko Seiki Kabushiki Kaisha, , JP;
Abstract
A numerical control device for a grinding machine is equipped with a servo-motor which moves at least one of a spindle and a dresser. The spindle and/or the dresser moves relative to the dresser shaft center direction and the rotor shaft center direction. The numerical control device compensates an amount of servo lag using a target position compensation calculating circuit. A unit time target position is obtained by performing a track calculation at unit times on the basis of the amount of servo lag stored in a storage device. Feedback control of the servo motor is effected by calculating a compensated target position dependent on the unit time target position.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile