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. 04, 2000
Filed:
Dec. 21, 1998
Jeffrey Hayes, Camarillo, CA (US);
Datron/Transco, Inc., Simi Valley, CA (US);
Abstract
A device for driving a stepper motor in variable sized micro-steps in response to slew rate commands. The device integrates the slew rate commands, calculates the currents to be supplied to the windings of the stepper motor and supplies these currents to the stepper motor. The device utilizes an update frequency for the integration, calculation and supply of currents to the stepper motor that is higher than the frequencies of the predominant resonances of whatever system is being driven by the stepper motor. As a consequence, the size of each micro-step executed by the stepper motor in response to slew rate commands is larger for high slew rates and smaller for low slew rates.