Compensation control method for multi-axis machines

Abstract

A compensation control method for a multi-axis machine. The multi-axis machine has an end face and the center of the end face is located on the central axis of the multi-axis machine. First, three distance measuring devices are set on the end face of the multi-axis machine, and each distance is measured. The distance between the center of the instrument and the end face is equal, and then the end face is controlled to rotate with its center as the axis, and the three distance measuring devices are used to measure the distance on the surface of the workpiece respectively until two of the three distance measuring devices reach the desired position. The measured distances are the same, and then the end surface is flipped with the connection line of the two distance measuring devices as the axis, until another distance measuring device other than the two distance measuring devices matches the distance measured by the two distance measuring devices. The distance is the same, and finally the data generated by the above-mentioned control of the end face are recorded to serve as the basis for compensation control of the multi-axis machine.

Description

technical field [0001] The invention relates to a control method, in particular to a compensation control method for a multi-axis machine. Background technique [0002] The coordinate system used by multi-axis machinery for processing and manufacturing process can include machine coordinate system, workpiece coordinate system and workpiece program coordinate system in the controller. Before processing, it is necessary to confirm the relative relationship between the three before adjusting or compensating. So that the coordinate system of the workpiece program can match the coordinate system of the workpiece, so that the correct processing results can be obtained. The existing correction or compensation methods can be roughly divided into two types: manual correction and controller compensation. [0003] When using manual correction, in order to make the workpiece adjustable, it is impossible to fix the workpiece in advance, but when fixing it afterwards, the position of the...

AI Technical Summary

Problems solved by technology

[0003] When using manual correction, in order to make the workpiece adjustable, it is impossible to fix the workpiece in advance, but when fixing it afterwards, the position of the workpiece may be deviated due to uneven application of force or careless pushing of the workpiece, making it difficult to obtain accurate results, and the correction time will also increase. Increases substantially with degrees of freedom

[0004] When controller compensation is used, most of the existing methods are contact measurement methods, such as probe rods. If the user does not operate well, there may be collisions between the probe rod and the workpiece, resulting in physical damage to the surface of the workpiece and the probe rod. , affecting the accuracy of subsequent applications

In addition, in order to improve the accuracy of contact measurement, it is usually necessary to make several ground datum surfaces when preparing the workpiece, resulting in high material preparation costs

In addition, the probe rod and the workpiece need to be given positive and negative power supplies respectively. When the power supply voltage is zero, it means that the probe rod is in contact with the workpiece. However, if the workpiece is a non-conductor such as ceramic material, this contact measurement method cannot be used.

Images