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:
Sep. 14, 2010
Filed:
Feb. 21, 2008
Takashi Norihisa, Niwa-Gun, JP;
Takashi Norihisa, Niwa-Gun, JP;
Okuma Corporation, Niwa-gun, JP;
Abstract
A controller includes a rotating direction detecting unitto detect the rotating direction of a servo motora reversing distance computing unitto compute a rotating angle of the servo motora rotation resistance computing unitto compute rotation resistance on the servo motor sideand an elastic deformation error amount computing unitto compute a deformation error amount of a ball screwIn the controller, when the rotating direction detecting unitdetects reverse of the servo motorthe rotation resistance computing unitcomputes rotation resistance based on a rotating angle δθ of the servo motorafter the servo motor is reversed. The elastic deformation error amount computing unitcomputes the elastic deformation error amount δ based on the computed rotation resistance. Thereby, a position command value inputted into the position control unitcan be corrected.