System and method for recovering reference point of each axis of numerical control machine tool

Abstract

The invention discloses a system and method for recovering a reference point of each shaft of a numerical control machine tool, and the method includes the steps of: S1. grouping related parameters D into two groups, one being a single-character type, the other being a double-character type; S2. setting values for the parameters D in a subprogram, so as to call the Number 28 subfunction of window functions; S3. setting conditions for calling the subprogram in a PMC main program; S4. reading a mechanical coordinate value of each shaft by the subprogram and storing to the parameters D; S5. in an ''increment'' or ''hand wheel'' mode, according to symbols and sizes of numerical values of D, moving reversely for a certain distance to return to an original reference point; and S6. setting related CNC parameters, and setting a current point as a reference point. The method for recovering the reference point of each shaft of the numerical control machine tool is novel in design, convenient to operate, stable in performance, good in reliability, convenient to maintain, and relatively high in efficiency, and thus is convenient for popularization and use.

Description

Technical field [0001] The present invention relates to the technical field of numerically controlled machine tools, and in particular, to a system and method for restoring reference points of various axes of a numerically controlled machine tool. Background technique [0002] In modern CNC machine tool manufacturing and processing, in order to save processing time, the servo motor of the CNC machine tool is equipped with an absolute position encoder. After using the absolute position encoder, as long as the reference point position of the machine tool is determined, every time the machine is powered on, there is no need to go back to the reference point before machining. When the machine stroke is long, the time saved is even greater. Significantly. [0003] Unfortunately, there is a serious problem in the motor equipped with an absolute rotary pulse encoder produced by FANUC in Japan. Its absolute rotary pulse encoder must be powered at all times to memorize the current mechanic...

AI Technical Summary

Problems solved by technology

As a result, the coordinates of the tool change point of the machine tool, the compensation value of the screw pitch error and other related data need to be re-measured, which will greatly increase the workload of the machine tool manufacturer.

What's more serious is that if you import different backup parameters to CNC through U disk or CF card, alarm No. 300 will also occur, resulting in the loss of the original reference point.

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