Design and study of the high-precision stepping motor control system for intelligent sampling of liquid

With the development of machinery and electronics toward digital and intelligent, the study of control system takes a very important role. The high-precision stepping motor control system for intelligent sampling of liquid achieves intelligent and high-precision sampling locations by the intelligent high-precision controlling of stepper motor. Stepper motor is the implementing agency that put an electrical pulse into the angular displacement. The high-precision stepper motor control system is based on the ARM S3C44B0, combined with a power supply, keyboard input, serial communications, stepper motor driver, photoelectric sensor positioning, host computer operating software and other modules. All these modules set up an intelligent and high-precision control system of stepper motor. The operator can complete intelligent control of stepper motor by the keyboard or the host computer operating software. High-precision stepper motor positioning can be achieved by photoelectric sensor positioning, avoiding accumulated error that is produce by losing step, which make the control system of stepping motor can work in the long-term operation of high-precision occasions.