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:
Apr. 24, 2012
Filed:
Apr. 22, 2009
Hirokazu Tsubota, Kanagawa, JP;
Hirokazu Tsubota, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A stepping motor controlling device includes first and second clock signal generators, plural drivers, and a controller. The first clock signal generator generates a reference clock signal for rotationally driving of plural stepping motors. The second clock signal generator generates, on the basis of the reference clock signal, for each of the stepping motors, speed control clock signals. The plural drivers are provided respectively for the stepping motors and, on the basis of the speed control clock signals for the respective stepping motors, generate pulse excitation signals and input the pulse excitation signals to the stepping motors to rotationally drive the stepping motors. The controller controls the second clock signal generator to generate the speed control clock signals such that phases of the respective speed control clock signals for the stepping motors differ from one another.