Abstract:The open-loop system which is composed by step-motor is simple, cheap and very practical, so there are very wide range of applications in printers and other office automation equipment and various control devices, and many other fields.
This article describes one design of step-motor system based on microcontroller.The program of the preparation of a motor , reverse, speed up, slow down, stop is written by compile language. The above functions are realized through the microcontroller, motor driver chip ULN2083 and correspond key . This article introduces the principle of stepper motor and single-chip microcomputer, the system hardware circuit, the program components, while software and hardware for the debugging, at the same time introduces the problems which are appeared in the debugging process and the solutions of the problems . The design has the advantages of clear , high reliability, strong stability, etc.,and the above-mentioned functions are realized through the debugging.
Key Words: Stepper motor;AT89C51; driving mechanism; rotation