PC Based 4-Axis Stepper Motor Control

Abstract

This project is developed for the users to control the operation of a stepper motor using PC. In a DC motor, there are two terminals called positive and negative. If voltage is given to DC motor, the motor runs in a particular direction and if the polarities are reversed, the motor runs in opposite direction. But in this project we use a stepper motor having 5(1+4) terminals. The stepper motor can be operated by applying negative pulse to the four pins while the center pin is common positive. The speed and the direction of the motor can be controlled by changing the frequency of the pulse and direction of the pulse. When the users press the run button in the software, corresponding signals are transmitted through serial port. The microcontroller receives the signal through RS232. Suitable positive pulses are generated and are given to a not gate driver IC ULN2003, which gives negative voltage which is suitable to the stepper motor. The user can control the speed as well as direction of the stepper motor. The microcontroller program is written in assembly language and the design and port programs are written in Visual basic.

Existing System

Proposed System

Architecture

BLOCK DIAGRAM