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:
Oct. 26, 1993
Filed:
Apr. 03, 1992
Applicant:
Inventor:
Trevor J German, Waterloo, CA;
Assignee:
NCR Corporation, Dayton, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05B / ;
U.S. Cl.
CPC ...
318685 ; 318696 ;
Abstract
A stepping motor has an attached encoder which provides automatic commutation point alignment for maximum efficiency and torque during closed-loop operation. Novel use of a fine line encoder along with a phase mapping circuit permit shaft/rotor alignment of the stepping motor with minimum commutation errors, and without the need for manual adjustments.