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:
Jan. 21, 1997
Filed:
May. 17, 1994
Hiroshi Miyata, Toyota, JP;
Katsumi Ishida, Toyoake, JP;
Toyota Jidosha Kabushiki Kaisha, , JP;
Aisan Kogyo Kabushiki Kaisha, , JP;
Abstract
A step motor controller including a sampling program for sampling, at predetermined intervals, input target values that represent a position of the step motor. The difference between the sampled target value and a rotational position of the step motor is obtained. A step motor accelerating and decelerating program accelerates the step motor upon finding the difference between the sampled target value and the current position of the step motor is greater than a set value. When the difference is less than the set value the step motor is decelerated. The predetermined sampling time does not correspond to the natural frequency of the step motor system or to a period corresponding to a fractional multiple of the natural frequency.