Measurement point selection and compensation of geometric error of NC machine tools

2020 ◽  
Vol 108 (11-12) ◽  
pp. 3537-3546
Author(s):  
Hongwei Liu ◽  
Rui Yang ◽  
Pingjiang Wang ◽  
Jihong Chen ◽  
Hua Xiang ◽  
...  
Keyword(s):  
Machine Tools ◽  
Geometric Error ◽  
Measurement Point ◽  
Point Selection ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Measurement Point Selection

Error Modeling and Identification Technology for Circular Path of NC Machine Tools

2013 ◽  
Vol 278-280 ◽  
pp. 345-349
Author(s):  
Zhen Ya He ◽  
Jian Zhong Fu ◽  
Xin Hua Yao
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Measurement Method ◽  
Geometric Error ◽  
Error Modeling ◽  
Circular Path ◽  
Rate Condition ◽  
Nc Machine ◽  
High Feed ◽  
Nc Machine Tools

An error mapping modeling and identification technology for the circular path test of NC machine tools is proposed. First, geometric error modeling of the NC machine tool was established and the theory of the laser measurement method was introduced. Then through further analyzing the influence of the geometric errors to circular path deviations, the error items were identified, such as the displacement errors, backlashes and squareness errors. Finally measurement and compensation experiment of circular path was conducted. The experimental results show that the geometric error modeling is feasible, and the measurement method can be set up easily and rapidly, even can be used to measure smaller radius circular path under a high feed rate condition. After compensation, the accuracy of the circular path of the machine tool is improved by 50.88%.

Measurement of Finishing Errors for Evaluation of Dynamic Characteristics of NC Machine Tools

2005 ◽  
Vol 295-296 ◽  
pp. 625-630
Author(s):  
S.C. Kim ◽  
C.H. Lee ◽  
B.H. Lee
Keyword(s):  
Machine Tools ◽  
Dynamic Error ◽  
Geometric Error ◽  
Point Of View ◽  
Experimental Result ◽  
Accuracy Evaluation ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Precision Machine Tools ◽  
Circular Interpolation

Efficient development of method for performance evaluation of machine tools has been regarded as the most important issue to enhance accuracy and quality for users and manufacturers. Recently, a method of accuracy evaluation for machine tools has been studied as interests on precision machine tools have rapidly increased. From this point of view, the circular interpolation test of machine tools is recognized as the most useful method to identify the dynamic accuracy of NC machine tools by ISO, ANSI/ASME and others. In this paper, we studied and developed a formal measurement system with a grid encoder to analyze the final accuracy of NC machine tools. We analyzed the servo system error and the geometric error of NC machine tools through measuring the dynamic error signals by using this system. We verified the experimental result and enhanced the reliability by means of comparing the characteristics of the developed system with the kinematical ball-bar system.

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