Closed-loop stepping module system with linear encoder and control method thereof

Abstract

The invention relates to a closed-loop stepping module system with a linear encoder and a control method thereof. The system comprises a motor driver, a motor controller, a motor installation bracket, a base, and a stepping motor, a lead screw, a nut, a guide rail and a load sliding block which are respectively installed on the motor installation bracket and the base, wherein the motor controller is connected with the stepping motor through the motor driver, the stepping motor is in transmission connection with the nut through the lead screw, the nut drives the load sliding block to move on the guide rail, the system further comprises a linear encoder magnetic strip and a linear encoder module, the linear encoder magnetic strip is installed on the motor installation bracket and the inner side wall of the shell of the base, and the linear encoder module and the linear encoder magnetic strip are oppositely arranged and connected with the nut. Compared with the prior art, the closed-loop stepping module system has the advantages that the motion precision of the linear stepping module is greatly improved, and the like.

Description

Technical field [0001] The present invention relates to a closed loop step module system and a control method thereof, in particular, to a closed-loop step module system with a linear encoder and a control method thereof. Background technique [0002] Stepping Motor, due to its preferred low-speed motion response characteristics, is often connected with some straight-line transmission, rail, etc., in various machines and equipment, used to be used in large quantities as a linear motion The control signal is converted into a straight motion to achieve a distance from the control actuator movement, and generate thrust that can effectively drive the load. [0003] However, this conventional integration method and a mechanical design have a large defect: one hand, because the stepper motor is usually controlled by the open loop, it is difficult to find out that causes this mechanism in the exercise, overshoot, and blocking. Waiting for the problem, its open-loop dynamic response is a...

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Problems solved by technology

[0003] However, this customary integration method and mechanism design have relatively large defects: on the one hand, since the stepper motor is usually controlled in an open-loop manner, it is difficult to find out-of-step, overshoot, and stalling during the movement of this mechanism And other problems, the dynamic response ability of its open-loop method is also very low

In addition, due to the existence of transmission mechanisms such as screw rods, nuts, and guide rails in the entire module system, these transmission mechanisms inevitably have different degrees of clearance, and there will also be different degrees of cumulative errors in linear motion, resulting in inconsistent linear motion accuracy of the overall system. high

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