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Modeling of Positioning Error for 3-Axis NC Milling Machine Tools Based on Multi-body System Theory

Hongtao Wu

Abstract

The error sources of NC machine tools and the existing error compensation methods are analyzed.Error compensation based on the theory of multi-body system is introduced.The topological structure of multi-body system and their lower numbered body array,the composing methods of characteristic matrixes are explained.A 3-aixs NC milling machining tools XK0820 is taken as an example,the modeling process of positioning error for 3-Axis NC milling machine tools is expatiated and the result of the modeling is given.

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Key concepts: Machine tool, Machining, Compensation (psychology), Process (computing), Computer science, Control engineering, Engineering drawing, Mechanical engineering