Onward with my project. This is for an EDM, electrical discharge machine. Instead of a normal electronic circuit that avoids making sparks, the whole idea is to make shot time controlled sparks. The sparks are to happen between a shaped electrode and a conductive metal work piece, while immersed in a light viscosity oil bath. To make the shape of the electrode into the work piece by eroding the metal with the sparks, the oil then carries the eroded metal away. This is a common machine shop way of machining hardened metal or difficult shapes.
The first type of this machine used a RC(resistor capacitor) type circuit. It then changed to a "pulsed" circuit over time, into today's CNC high tech machines. My desire is to come up with a simple pulsed EDM circuit. This has been a very long time project that I would love to complete be for kicking the bucket, kind of a bucket list project. I've had the mechanical parts of this done for a long time, my mechanicals have even been pictured in a book by another guy, Ben Flemming, that sells plans for making DIY EDM's. But I don't care for his way of doing the spark generator. Even he agrees it's not optimal but it is easy.
I've attached my latest idea for my spark generator. I don't show the timing circuit, because thanks to this, AAC, site I've got that covered now. Thank you to all of you that helped for that. Now maybe with your help I can get the power side of the circuit figured out.
Please take a look at what I've come up with. The low side mosfet will turn on and charge the inductor, then be turned off. Due to the lower resistance of the spark gap, compared to the load resistor, when the mosfet turns off, the kickback will cause a spark in the gap. Or at least this is my thinking. Does it look feasible? Please give your thoughts, thank you.
The first type of this machine used a RC(resistor capacitor) type circuit. It then changed to a "pulsed" circuit over time, into today's CNC high tech machines. My desire is to come up with a simple pulsed EDM circuit. This has been a very long time project that I would love to complete be for kicking the bucket, kind of a bucket list project. I've had the mechanical parts of this done for a long time, my mechanicals have even been pictured in a book by another guy, Ben Flemming, that sells plans for making DIY EDM's. But I don't care for his way of doing the spark generator. Even he agrees it's not optimal but it is easy.
I've attached my latest idea for my spark generator. I don't show the timing circuit, because thanks to this, AAC, site I've got that covered now. Thank you to all of you that helped for that. Now maybe with your help I can get the power side of the circuit figured out.
Please take a look at what I've come up with. The low side mosfet will turn on and charge the inductor, then be turned off. Due to the lower resistance of the spark gap, compared to the load resistor, when the mosfet turns off, the kickback will cause a spark in the gap. Or at least this is my thinking. Does it look feasible? Please give your thoughts, thank you.