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:
Jul. 28, 1987
Filed:
Oct. 04, 1985
Applicant:
Inventors:
Assignee:
Seiko Seiki Kabushiki Kaisha, Chiba, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318696 ; 318685 ;
Abstract
A stepping motor control apparatus comprises current computing means for computing a motor-coil exciting current corresponding to the holding position from a predetermined wave form pattern; micro step driving means for driving the stepping motor toward the final holding position through a micro step transfer distance shorter than a regular step transfer interval by exciting the motor-coil by application of the exciting current obtained from the computing means; and acceleration control means for controlling the stepping motor acceleration by switching on and/or off the exciting current of the motor-coil in accordance with an acceleration signal.