A magnetic suspension spindle system for micro EDM

As an important manufacturing technology, micro EDM is widely applied in many industry fields. However, the slow response speed of servo system often leads to short circuit and arc discharge. To deal this problem, a magnetic suspension spindle system is used to improve the response frequency. This paper introduces the structure and principle of the magnetic suspension spindle device used for micro EDM, hardware and software solutions of the control system are illuminated by schematic diagram or flow chart. Using incremental PID algorithm, the axial (Z) response frequency reaches 150Hz, the radial and axial position accuracy is achieved with 5 mu m and 2 mu m. And the micro EDM is realized through the magnetic suspension spindle in 1.3 mm stroke. (C) 2016 The Authors. Published by Elsevier B.V.