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Compensation realizing method for linear axis positioning error in numerical control system

A positioning error and numerical control system technology, applied in the direction of digital control, electrical program control, etc., can solve the problems of poor accuracy, poor reliability, unfavorable integration of numerical control system function modules, etc., to achieve the effect of improving positioning accuracy and meeting high-precision machining

Active Publication Date: 2012-07-11
SHENYANG CALCULATION TECH INST CHINESE ACAD OF SCI
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Problems solved by technology

[0005] Aiming at the deficiencies such as poor accuracy, unfavorable integration of functional modules of the numerical control system, and poor reliability existing in the error compensation method of the numerical control system in the prior art, the technical problem to be solved by the present invention is to provide a method for realizing the compensation of the linear axis positioning error in the numerical control system

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  • Compensation realizing method for linear axis positioning error in numerical control system
  • Compensation realizing method for linear axis positioning error in numerical control system
  • Compensation realizing method for linear axis positioning error in numerical control system

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing.

[0023] Such as figure 1 As shown, the implementation method of linear axis positioning error compensation in the numerical control system of the present invention includes the following steps:

[0024] Establish the positioning error compensation model of the linear axis in the numerical control system;

[0025] Calculate the positioning error compensation value through the linear axis positioning error compensation model;

[0026] Correct the linear axis motion control instruction data according to the linear axis positioning error compensation value to realize the linear axis positioning error compensation.

[0027] Such as figure 2 As shown, the establishment process of the linear axis positioning error compensation model is as follows:

[0028] According to the pitch error of the CNC machine tool at different temperatures, the pitch error fitting vector and the com...

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Abstract

The invention relates to a compensation realizing method for linear axis positioning error in a numerical control system. The method comprises building a positioning error compensation model of a linear axis in a numerical control system; calculating a positioning error compensation value through the model; and correcting linear axis motion control command data according to the positioning error compensation value to realize linear axis positioning error compensation. The inventive method is accurate, provides feasible and advanced realization technology for numerical control system, remarkably improves numerical control system linear axis positioning precision, and satisfies machine tool user requirement for high precision processing.

Description

technical field [0001] The invention relates to a numerical control system error compensation method of a numerical control machine tool, in particular to a method for realizing compensation of linear axis positioning errors in a numerical control system. Background technique [0002] The positioning accuracy of the linear axis is one of the three accuracy indicators (backlash, positioning accuracy and repeat positioning accuracy) of the linear axis in the axis feed direction, and is an important indicator to measure the working performance of the CNC machine tool. On the one hand, it depends on the pitch manufacturing accuracy of the ball screw in the linear shaft transmission chain; on the other hand, it depends on the axial thermal expansion of the linear shaft affected by the temperature during the rise from the ambient temperature to the working temperature. [0003] There are two traditional positioning error software compensation methods, one is to simply compensate t...

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Application Information

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IPC IPC(8): G05B19/19
Inventor 孙一兰于东杨东升王品刘荫忠刘明烈
Owner SHENYANG CALCULATION TECH INST CHINESE ACAD OF SCI
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