Browse Prior Art Database

Microprocessor Control of Stepper Motor

IP.com Disclosure Number: IPCOM000061455D
Original Publication Date: 1986-Aug-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Helfenberger, CD McSparran, RA Renner, RA [+details]

Abstract

A stepper motor, used, for example, in a printer, is controlled using a microprocessor programmed in accordance with a control program which uses information taken from a set of tables in a memory. The microprocessor is used to control the operation of the stepper motor so that the motor moves at the required speed through a selected number of steps. In order to cause the motor to move as required, it is necessary to supply to the motor a suitable sequence of phase signals. The microprocessor is suitably programmed and uses look-up tables to obtain for each type of movement required a set of digital signals. These digital signals are converted into the necessary phase signals to cause the motor to move as required.