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:
May. 13, 2003
Filed:
Oct. 25, 2000
Hitoshi Takemoto, Niigata, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A belt-drive-control circuit comprises a controller for controlling by using servo constants and servo parameters variable in accordance with the variation in load applied to a belt mounted on rollers. The belt-drive-control circuit comprises a LUT (lookup table) which is a memory. The LUT stores the servo constants and servo parameters optimized by experiments and evaluations in accordance with the load applied to the belt which varies between print sequences. A servo controller which is a major component of the belt-drive-control circuit receives a command from a CPU to rotate a belt-driving motor (a DC motor) together with the data on the load applied to the belt. The servo controller reads from the LUT the servo constant and servo parameter corresponding to the received data on the load, computes the computation expression by using the read servo constant and servo parameter, and outputs computed rotational-speed data to a motor-driving-signal converting circuit.