Knowledge base and assumptions for holistic modelling aimed at reducing axial errors of complex machine tools

The paper presents the idea and need for the holist ic modelling of machine tools. The complexity of su ch modelling is illustrated for a 5-axis machining cen tr . The need to model errors in the controllable a x s of machine tools with rotational and linear motion drives is indicated. The physical dependences havin g a bearing on the state of deformations produced by temperature and dynamic forces, as well as the assu mptions and computational models of shift generation in the high-speed bearing sets of spindles, and models of the behaviour of the ball screw are presented. Moreover , th results of experimental studies of the therma l behaviour of linear motor sets and guideways with rolling blo cks are reported.