Building a Computerized Position Control System Using DC Motor

In this book a computerized position control system for a Direct Current (DC) motor was built and tested for accuracy and repeatability. The angular position of the shaft of a DC motor was monitored and controlled using an optical encoder and a computer program written in turbo C. In the experimental setup the motor shaft was deliberately seized for a while, the program produced a message that the motor was not moving, when the motor shaft was released the program drives the motor to its target position. The research idea may be applied to stepper motors used in Computer Numerical Controlled machines and robots, to monitor and control their response to programmed commands, when not used within their specified range of load and speed, as well as many applications such as DC motor driven computerized wire winding machines, and electric passenger's lifts.