Electrical Discharge machining (EDM) is capable of machining geometrically complex or hard material component and a widely used process in manufacturing industries for a high-precision machining of all types of conductive materials. Material of any hardness can be machined because the hardness is not a foremost parameter in EDM. In this paper, the effect of EDM parameters such as Pulse on Time, Pulse off Time, voltage and current on material removal rate (MRR) in Cast iron is investigated. Cast iron is an important material used in various applications because of its high hardness. Brass, whose main constituents are copper and zinc, is used as a tool material and the influence of copper and Zinc on cast iron workpiece is studied. Experiment is carried out and the results were analyzed using analysis of Variance and response graphs. Signal to Noise is used to identify the contribution of each cutting parameter towards the material removal rate.Â
