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:
Dec. 09, 1997
Filed:
Jul. 09, 1996
Yoshinori Makita, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A position detection error generated due to the response delay of a position measuring device is corrected so as to essentially improve the relative position alignment performance of a moving member. In a position control method for controlling a moving member 15 (25) to target positions generated at predetermined periods, the current position of the moving member is measured by a position measuring device 16 (26), and a value corresponding to the detection error of the current position of the moving member due to the detection delay of the position measuring device is subtracted, as a correction amount O.sub.w (O.sub.r) of the current position of the moving member, from the value of a target position command signal X.sub.w (X.sub.r).