p Matoorian - research assistant university putra malaysia
S sulaiman - professor , university putra malaysia
MMH Megat ahmad - Associate professor , University putra malaysia
E imanian - Researcher assistant , farakosh sepahan co . Isfahan science and technology Town

The paper presents the application of the Taguchi robust design methods to optimise the precision and accuracy of the electrical discharge machining process (EDM)for machining of precise cylindrical forms on hard and difficult - to - machine materials. The present study has been carried out on the influenceof six design factors: Intensity supplied by the generator of the EDM machine (I), pulse -on time (t i) , voltage (V) , pulse - off time ( t o) , servo (V G) , and rotational speed (C) which are the most relevant parameters to be comtroller by the EDM process machinists , over material removal rate (MRR)as an indicator of the efficiency and cost - effectiveness of the process.

Taguchi,Design of Experiments, EDT, Material Removal Rate.