Thomas Bödrich

Novel Electrodynamic Feed Units for Small Machine Tools and Automation

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.