1. Micro EDM and Micro ECM Drawbacks of micro-EDM milling:
Rough surface due to overlapped craters
Heat-affected-zones
Sequential micro-EDM and micro-ECM
Change machining fluid  problematic
Combine in the same process
Different machining fluid ???

2. Micro EDM and Micro ECM Approach
Dielectric fluid
Micro-ECM
Electrolyte
Non-conductive
Conductive ?
Dielectric strength
 Sparks can occur
Low-resistivity deionized water
Slight conductivity
 Promotes weak electrochemical reaction

3. Micro EDM and ECM Approach
Simultaneous micro-EDM and ECM milling
(SEDCM milling)
Low-resistivity DI water
Short pulse
Low feedrate
to localize dissolution
To promote
electrochemical reaction

4. Simultaneous Micro EDM and ECM Milling

5. Simultaneous Micro EDM and ECM Milling Factors
Scanning Feedrate
Low feedrate is a requisite for electrochemical reaction

6. Simultaneous Micro EDM and ECM Milling Factors
Short voltage pulses to localize dissolution zone
Layer depth – smaller layer depth preferred

7. Fabricating Different Shapes

8. Better Surface Finish