Homemade edm question

[ronan walshParticipant @ronanwalsh98054]

Has anyone made a edm (electro discharge machining) machine at home for hobby use ? There are several books available and several websites dedicated to this method of machining, as well as a yahoo group. I was just wondering what results can be obtained etc.

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[ronan walshParticipant @ronanwalsh98054]

[Michael Cox 1Participant @michaelcox1]

Hi Ronan,

I have made a simple spark erosion apparatus based on the original idea of Deryk Lynas. This uses an oscillating spindle.

**LINK**

My version is a low power version based on a 24V laptop power supply and it will erode a 3 mm diameter hole at the rate of circa 6 mm/hour. With a higher voltage power supply (Deryk Lynas used a 50 volt transformer giving 70 V dc)the erosion rate would be much faster. The advantage of the Deryk Lynas method is that it is mechanically simple and it has simple electronics.

I have upgraded the original version with a mechanism to maintain a constant maximum spark gap, see

http://mikesworkshop.weebly.com/a-spark-erosion-apparatus-mk-3.html

Mike

[ronan walshParticipant @ronanwalsh98054]

Thanks Michael, i was more interested in the pulse edm rather than the more simple sparker. They are useful for broken tap or stud removal certainly, but i was wondering if the pulse version would be more useful for some actual intricate metal removal,

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