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:
Jun. 22, 1999
Filed:
Nov. 25, 1997
Masakazu Senoh, Yonago, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A drive control device for a stepping motor (1) includes a step signal generator (6) for generating a step pulse signal (e) at a constant interval of a period (T1), and an exciting signal generator section (2, 3) for generating an exciting signal in accordance with the step pulse signal, driving the stepping motor in accordance with the exciting signal, where the step pulse signal (e) with the constant period (T1) is obtained in the step signal generator based on externally supplied step data (a) including a step number (n) of a constant period (T0) designating a rotation of the stepping motor to a target position, and even when the step number of the stepping motor is increased in dividing a dummy sine wave stored in ROMs, the processing time of a microcomputer is not affected, attaining a high accuracy in step drive positioning of a stepping motor with smooth rotation thereof.