Absolute zero control method and device for stepper motor

Abstract

The invention is a absolute zero-position control method and device for step motor, including a step motor controlled by a controller and a transmission system driven by the step motor, there is an inversion sensor arranged at the end of the transmission system and connected with the controller, the controller receives inversion judge signal of the transmission system and controls the rough positioning of the step motor; there is a position sensor arranged on rotor shaft of the step motor and connected with the controller, the controller receives accurate reach judge signal of the transmission system to control the accurate position of the step motor, namely the absolute zero position; as compared with exiting technique, it has the characters of reliable method, simple device, low cost, convenience to control the absolute zero position of the step motor, wide application, etc.

Description

technical field [0001] The invention relates to a method and device for controlling the absolute zero position of a stepping motor, in particular to an absolute zero position control and a control signal device for the stepping motor driving a transmission system, belonging to the control of the stepping motor. Background technique [0002] Stepper motor is a control motor that converts pulse signals into linear displacement and angular displacement. Because its speed and displacement strictly correspond to the number of pulses, it is easy to control and can be widely used in automatic control systems. As an actuator, It is one of the key products of mechatronics. In use, stepper motors are mostly open-loop control. Although they have high position accuracy, it is difficult to achieve absolute zero control. Generally, closed-loop control is required to achieve this. The common method is to control the position of the motor. A photoelectric encoder or resolver is added to th...

AI Technical Summary

Problems solved by technology

However, the price of the photoelectric encoder or resolver is expensive, and it is only used for the detection function of a zero signal, and its cost performance is too high, which is not conducive to popularization and application.

At present, stepping motors are widely used in economical CNC machine tools. Most of its travel control is set at the end of the transmission system, such as proximity switches, photoelectric switches or other travel switches as in-position sensing devices to determine the rough positioning of the transmission. It is not high, far from meeting the precision requirements of machine tool processing. Generally, in order to meet the processing requirements in use, the tool must be set first, and then the program is started for processing, but this is too time-consuming and the efficiency is not high.

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