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:
Jul. 22, 2003
Filed:
Dec. 29, 2000
Yanqing Li, Jersey City, NJ (US);
Luu T. Pham, Trumbull, CT (US);
Pitney Bowes Inc., Stamford, CT (US);
Abstract
A method of controlling a microstepping motor is disclosed. Logic circuitry is initialized by a microcontroller. A logic sequence to determine a motor use profile, a system profile, and a program flow is performed, followed by a step sequence to establish the timing pattern of electrical impulses to be directed to an integrated circuit. A predetermined acceleration table is then accessed to implement acceleration. The logic circuit returns a delay constant from the acceleration table and places a set of data relative to the delay constant in one or more registers. A timing sequence is delivered to the integrated circuit that includes a set of interrupt service routines corresponding to a state of the motion profile. Each one of the interrupt service routines reloads a timer with a next delay constant and sends the next delay constant to the integrated circuit before updating the step count.