Compound Error Compensation Technique for CNC Machine Tools Based on Interpolation Method

Abstract

Abstract:

In order to improve the accuracy of computer numerical control(CNC) machine tools, a compound modelling method of geometric and thermal error was presented based on linear interpolation and Newton interpolation. Online realtime error compensation was implemented by applying the CNC external machine zero point shift function and a novel self-developed synthesis error real-time compensation system. The experimental results show that the new model is convenient in calculation and precise in prediction. Therefore it is suitable for the real-time compensation of geometric and thermal error of machine tools in complex industrial applications.

Key words:computer numerical control (CNC) machine tools,geometric error,thermal error,error compensation system,real-time error compensation

CLC Number:

TH 161

WANG Wei,YANG Jianguo. Compound Error Compensation Technique for CNC Machine Tools Based on Interpolation Method[J]. Journal of Shanghai Jiaotong University, 2014, 48(1): 12-21.

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