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Design- and control-concept for compliant machine tools based on controller integrated models

: Uhlmann, E.; Eßmann, J.; Wintering, J.-H.


CIRP Annals. Manufacturing Technology 61 (2012), No.1, pp.347-350
ISSN: 0007-8506
Journal Article
Fraunhofer IPK ()
machine tools; control; micro-machining

The paper presents a novel design- and control-concept for machine tools aiming for lightweight design. A Kalman-filter containing a model of the mechanical structure is applied. The Kalman-filter calculates the dynamic dislocation of the machine tool body with respect to the tool-center-point and its velocity. Dislocation and velocity are used for the correction of the CNC's setpoint values. Experimental results show, that the dynamic dislocation had been reduced considerably. This allows for a compliant design contrary to the established design-concept of stiff frames. The concept is proposed for direct-drive machine tools used for micro-milling.