Abstract
Short travel ranges up to approx. 25 mm as in future small machine tools enable linear direct drives with simple single-phase design. Especially designs with moving magnet(s) and an iron core stator winding allow for large actuator constants, i.e. high forces at little losses and small volume. Different types of those compact, dynamic and cost-effective linear axes and tables as well as a novel planar direct drive have been developed, built and tested. They feature integrated ball or flexure guides, integrated incremental or absolute position sensors with resolutions from 0.16 to 1.25 \(\upmu \)m, embedded flatness-based position control, sensorless force control and various control interfaces. Selected prototypes and their features are presented.
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Acknowledgements
The authors would like to thank Univ.-Prof. Dr.-Ing. Frank Woittennek, now professor at UMIT University, and Carsten Knoll, Laboratory of Control Theory of Technische Universit Dresden, for their valuable support on flatness-based position control.
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Bödrich, T., Ziske, J., Stock, M., Lienig, J. (2017). Novel Electrodynamic Feed Units for Small Machine Tools and Automation. In: Wulfsberg, J., Sanders, A. (eds) Small Machine Tools for Small Workpieces. Lecture Notes in Production Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-49269-8_10
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DOI: https://doi.org/10.1007/978-3-319-49269-8_10
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