Implementation of closed loop based scan mechanism

Abstract

This paper presents a closed loop scan mechanism using a stepper motor based Gimbal Technique. For its control, Arduino microcontroller based drive electronics is developed. This paper proposes a flexible structure for usefulness in various applications like tracking, satellite imaging etc. This paper analyzes the programming and hardware structure for an easy implementation using the Arduino microcontroller. For a bipolar stepper motor drive, the full H-bridge driver based electronics is developed. Motor shaft position is sensed by incremental optical encoder. The proposed module has high accuracy (.06% in scan rate).