Article: Micro "turning" using wire EDM.(RAPID TRAVERSE: Metalworking Technology In Brief)

It's challenging to accurately turn or grind miniature round parts. That's because the pressure that tools or grinding wheels exert on parts such as the micro electrode on page 56 can cause the parts to deflect, making it difficult to achieve accurate concentricity. In fact, in some cases it's impossible to machine such tiny parts using these conventional methods.

One alternative is to rotate parts in a spindle mounted on the table of a wire EDM unit and allow the wire to "turn" the parts to shape and size. This is advantageous for micro-machining applications in that material is removed electrically via spark erosion, not mechanically. The chance for deflection ...

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