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. 01, 1987
Filed:
Nov. 12, 1985
Makoto Higomura, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A control system for positioning a movable member, includes a first control portion operative to move the movable member at a relatively high moving speed toward a position which is in proximity to a target stop position, the first control portion also being operative to decrease the moving speed of the movable member to a creep speed when the movable member moves from a predetermined deceleration starting position to said position in proximity to said target stop position; a second control portion operative on the movable member, after the creep speed is established, to place the movable member at said target position with a relatively high positional accuracy; a detector for detecting a positional error of the movable member with respect to reference at a time when said creep speed is established; and a third control portion for changing the deceleration starting position on the basis of detection by the detector.