STEPPER MOTOR CONTROL USING MICROCONTROLLER

Abstract

Computer controlled stepper motor is one of the most versatile forms of positioning systems. Open loop control of stepper motors suffers from a major disadvantage, that the rotation of the rotor becomes oscillatory and unstable in certain speed ranges. This study presents the micro stepping technique, which overcomes the problem of instability and at the same time provides high accuracy for micro stepping applications. This technique improves electronically resolution of the stepper motors and suppresses oscillations due to effects of mechanical resonance. This has greatly enhanced its usefulness in modern control applications.