Hi, maybe some people are interested in DIY Sinker and Wire EDM. I'm working on the G-EDM which includes a mostly printed CNC router, a DIY pulsegenerator and a custom motion control firmware that is able to move lines back in the line history to retract on short circuits.
It runs on an ESP32 and samples a current feedback with I2S ADC at close to 1MSps. The feedback is optically isolated through a linear optocoupler. PWM to power the drive the gate driver circuit is also isolated. Works pretty well so far.
The wire module had a redesign I am currently printing and building.
A little preview for those interested can be found on Youtube:
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