Marc Sanders of Entegris | POCO Materials discusses the Nov. 2019 article “How to EDM Steel and Copper Alloy Simultaneously” (written by Marc and Rob Fothergill) with Graphel’s Ken Dworznik.  The discussion includes polarity, on-time, peak current, material choice, and more, with a focus on getting the best results for your EDM application on both steel and copper alloy.  Also, common questions answered!