Abstract:
Micro-EDM is a newly developed method  to produce  micro parts  which in the range of 50-100µm.It is an efficient machining processes for the fabrication of a micro –metal hole with various advantages  resulting  from its characteristics of non-contact and thermal processes. In this paper  the Taguchi design approach  has been employed to investigate  the micro –EDM parameters in order to achieve  the highest Material Removal Rate (MRR), good surface quality  and low Tool Wear Rate(TWR) while machining Ni-Ti based Shape Memory Alloy (SMA),it has been observed that MRR is highly influenced by capacitance , discharge voltage  and depends up on the electrode material .Tungsten electrode is recommended  for better  surface roughness  and brass  electrode for  better MRR.   
Keywords: Micro-EDM , Micromachining , micro-holes, Ni-Ti shape alloy , Non conventional machining process.