Zero returning control method based on industrial Ethernet bus technology

Abstract

The invention discloses a zero returningzero returning control method based on industrial Ethernet bus technologies. The zero returningzero returning control method comprises the steps of: (1) charging a digital controller, (2) starting a zero returning mode, (3) judging whether the present position of a shaft is in a zero returning deceleration zone or not; (4) judging whether the present position of the shaft is at the front of the zero returning deceleration zone or not, (5) enabling a tool slider to return to a zero point at the first speed, (6) converting the fist speed of a tool to the second speed after a zero returning stopper contacts a zero returning switch, (7) receiving a rotating signal of an encoder by a servo motor after the zero returning stopper is separated, (8) decelerating the tool to zero after the rotating signal is obtained, and (9) returning the tool to the prior recorded zero position of a Z pulse signal from the present position. The zero returning control method enhances the accuracy of the zero returning motor of the tool, and reads the position of the tool in real time by utilizing the advantages of the bus data transmission. Moreover, the zero returning control method can realize the rapid zero returningting function of 1000mm / min feeding of the tool, and the zero returning precision is + / - 0.1mu m.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a control method for returning to zero of a numerically controlled machine tool equipped with industrial Ethernet GSK-Link bus technology. Background technique [0002] The machine tool coordinate system is the inherent coordinate system of the machine tool. The origin of the machine tool coordinate system is called the machine zero point (also known as the reference point or the mechanical zero point). place. In some cases, such as during automatic tool exchange or automatic pallet exchange, a certain feed axis or all feed axes of the machine tool must perform the machine tool zero return (that is, the machine tool zero return point, referred to as zero return) operation. [0003] Generally, the control methods of zero return of CNC machine tools are as follows: [0004] The first one is the low-speed zero-return control method without a one-turn signal. When the ze...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the defects of low zero return accuracy and slow speed in the prior art, and provides a machine tool zero return control method based on industrial Ethernet GSK-Link bus technology, which improves the zero return positioning speed and accuracy, and shortens the zero return execution time

Images