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. 03, 2003
Filed:
Aug. 07, 2001
Kazuo Sasama, Kawasaki, JP;
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for driving a stepping motor which performs a micro step driving of the present invention makes a rise through rate variable by matching a step difference related to a change in a value of current when a value of current caused to flow in the stepping motor is increased, and makes a fall through rate variable by matching a step difference related to a change in a value of current when the value of current caused to flow in the stepping motor is decreased. Particularly, at a point of the change of increase/decrease of the value of current caused to flow in the stepping motor, the rise through rate and the fall through rate matched with the step difference related to the change in the value of current are set, and when the value of current let flow in the stepping motor became a constant value, the rise through rate and the fall through rate are made small.