22

INTERFACING: STEPPER MOTOR

CHAPTER OBJECTIVES

In this chapter, the reader is introduced to interfacing of stepper motors with 8051 microcontrollers. After completion of the chapter, the reader should be able to understand

  • How do stepper motors work.
  • How to design hardware interface for stepper motors.
  • How to control speed and direction of rotation of stepper motors.

22.1 | Introduction

While DC motors start rotating immediately after receiving power through its terminals, stepper motors do not rotate in that way. Rotation of stepper motor needs digital pulses, and for every such pulse it would rotate through a fixed angle, generally 1.8° and stop thereafter. Therefore, before discussing the interfacing and controlling techniques, we should ...

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