The increasing demand for compactness and more wide variety of functional capabilities in each merchandise these days have made manufacturers to try for newer machining techniques. Different styles of micro-machining strategies are used for producing miniature elements and additives. Micro machining refers to material removal from 1 µm to 999µm. Electrochemical machining is able to machining a wide variety of electrically conductive materials which include tough and difficult-to-machine materials. This non-contact micro-fabrication process does no longer set off residual stress or cause device tool wear. When applied to produce micro-operations, it's far referred as electrochemical micro-machining (EMM). In this experiments it has been performed to analyze the impact of voltage on response parameters like material removal rate and shape accuracy of EMM process. Micro-holes were drilled on stainless steel-304 plate and a strip of composite material the usage of stainless-steel electrode of diameter 380µm with insulated walls as tool. The experiments have been conducted varying the voltage while maintaining input parameters like current, pulse on/off time, electrolyte and electrolyte concentration at a steady level. The outcomes have been as compared and studied.