Sedman Smythe Posted January 13, 2020 Report Share Posted January 13, 2020 Hi I am looking for a bit of direction with a project . Some time ago I bought a Spark Eroder or EDM (Electrical Discharge Machine) Mechanically it is very sound, but the power supply is I think beyond economic repair. As I understand the power supply it works between 0 volts and 100 volts Square Wave with a variable output current from 10 to 50 Amps. Also both the off time and the on time are separately adjustable. I believe the original system used a lot of power transistors which were switched by push buttons to obtain the correct power setting. I am sure someone out there with a better understanding of modern electronics will have a good idea of how to achieve the supply I need to build. Thank for looking, any pointers would be very much appreciated. Jonathan Smythe Quote Link to comment Share on other sites More sharing options...
HarryA Posted January 14, 2020 Report Share Posted January 14, 2020 That sounds like a major project. One would want to use a microcomputer as it would simplify the circuitry greatly. Example: https://www.youtube.com/watch?v=9IWWa0xCd04&feature=emb_logo It is said that power supplies are less expensive today for EDM machines, perhaps you could search on the internet for a good price. I would thing that 2950 pounds is expensive: https://baxedm.com/product/bx17-arc-generator/ I have an eight inch steel disk that I want to make a 100 tooth sprocket from - an electrical discharge machining would be great for that I would think. Quote Link to comment Share on other sites More sharing options...
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