Error correction system of machine tool XY plane

Abstract

The invention discloses an error correction system of a machine tool XY plane, belonging to the technical field of error correction control of a machine tool system. A system hardware comprises a servo driver and a servo motor, wherein the servo driver is controlled on the basis of an upper computer and a programmable logic controller, and the servo motor is connected with the servo driver; and the working platform of the XY plane is driven by the servo motor via a lead screw, and the upper computer is internally provided with a system error recognition module and a fitting compensation module for the machine tool XY plane. Since the software and the hardware of the system cooperate with each other, the function module of the upper computer can identify the data of a machine tool accuracy error model; by means of the timing compensation of the system, the machine tool can obtain ideal control precision; and meanwhile, a numerical control system is simple and convenient to set compensation data.

Description

[0001] technical field [0002] The invention relates to a machine tool system error correction control technology, in particular to a machine tool XY plane system error correction control technology. Background technique [0003] The error compensation of the machine tool is an effective measure to improve the precision of the machine tool, which has important practical significance. At present, at home and abroad, the error compensation of machine tools is mainly completed by the numerical control CNC system (the main foreign CNC numerical control system manufacturers include SIEMENS, FANAC, FAGOR, etc.). Its error compensation mainly includes pitch compensation and backlash compensation. During pitch compensation, the CNC system automatically superimposes the average position deviation of the target position Pi on the interpolation command, so that the error is partially offset and the error compensation is realized. During backlash compensation, it is necessary to meas...

AI Technical Summary

Problems solved by technology

[0004] When the CNC control system is used in the machine tool, the CNC controller needs to control the servo driver on the hardware, and then the servo driver controls the servo motor. In this way, the integrated system is expensive and the control structure is complicated.

For lathes with relatively simple functions (such as precision drilling machines), if a CNC controller is used, many complex functions of the CNC controller are not used in the application device, resulting in a great waste of resources

When the CNC system compensates, the average position deviation of the target position Pi is superimposed on the interpolation command. In this way, the error value of the compensation point between adjacent target positions is relatively large, and with the distance between adjacent target positions Increase, the position accuracy of the compensation point will also become worse

At the same time, the current popular CNC control system (such as: SIEMENS-840D numerical control system, etc.), its pitch error compensation adopts the absolute compensation method, and the compensation data can be set by executing the program. The method is intuitive but the operation steps are very cumbersome

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