Recent content by EDMGuru

Hi aeroHAWK, Unfortunately your voltmeter is still connected incorrectly. It needs to be connected either somewhere between R1 and the mosfet or direct to the electrode and the other side connect to the negative side. Also don’t forget that the output pulse from your mosfet will be inverse to...

Hi SmithDoor, Unfortunately I believe welders use an auto transformer which is unsuitable for EDM as their output when rectified is a plus and minus voltage in relation to ground (0v) so +20v DC to -20v DC if this makes sense, although you could use one in series with an isolation transformer...

Hi aeroHAWK, Yes that’s basically it only it’s the positive side of the 100v output that’s pulsed and the negative side goes straight to the work piece. Also your voltmeter is connected wrong; the left side of the wiring as shown in your drawing should go to the negative side and not the...

Hi stanstocker, The square wave frequency amplifiers output is amplified by the power generator, so basically you’re just changing a square wave output of say 5 volts @ 10 mA to an exact copy of the square wave but at a voltage of 100 volts @ 10 A (or what ever the output Amps is that is set by...

Hi stanstoker, The power supply to the power generator is via an isolation transformer (not shown in the video) which has an output of 70 volts ac. Once rectified this gives the 100 volt dc supply for the power generator which is just a basic amplifier design with 3 (could be more depending the...

Sorry, I don’t wish to throw a spanner in the works at this stage of your builds but actually a commercial grade EDM machine is easy and cheap to build, the problem is there is a misconception that there’s some sort of manufacturer’s design secret to these machines which makes people...