A stepper-piezo-based co-actuation paradigm for tool positioning in parallel spark micro-electro-discharge machining

Research paper by Kumar, R. V, Pal, A, Saha, S, Mandal, S.

Indexed on: 09 Nov '16Published on: 03 Nov '16Published in: Proceedings of the Institution of Mechanical Engineers Part B: Journal of Engineering Manufacture


We report a new method for tool positioning in micro-electro-discharge machining with multiple electrodes for generating parallel spark employing a combination of stepper motor and piezoactuator-based co-actuation method. The stepper motor was used for coarse positioning and the inequality arising due to difference in the tool size of multiple tools used in micro-electro-discharge machining was equated employing piezoactuation followed by electrical continuity test. Simultaneous sparks for two different electrodes could be observed employing this method. The voltage waveforms across the tool–workpiece interface also confirm the generation of simultaneous and parallel sparks across both the electrodes.