Stepper Motor Precise Position Control System Using DTMF Technology

Abstract

There is a great demand for stepper motor control in numerous applications such as process control in various industries, machine tools, computer peripherals, robotics etc. For many applications like laser trimming, IC bonding, and silicon processing, it is required to control the stepper motor from remote places. This paper presents the stepper motor position control using DTMF ( Dual Tone Multi frequency) technology. DTMF is a very important tool for acoustic communications because of its important advantages such as simplicity and audibility. Using a Telephone keypad, by pressing a particular key different DTMF tones have been generated which is related to the angular position signals of the stepper motor in both clockwise and anticlockwise direction. IC MT 8870 is used which decodes the received tones. The microcontroller PIC 16F628A is used to implement and process the control algorithm when DTMF tone is received. The driver used here for stepper motor is IC A3982SL.The developed system is cost effective, simple and rugged in construction. The observed experimental results shows that this system has good accuracy, repeatability and resolution.
DOI: 10.17762/ijritcc2321-8169.1505176