Hi guys. Would love to post my edm pics but i don't know how to upload in yahoo groups photo album. Anyway my question is about electrode wear out. The new RC...
... I personally would assume that someone that says "I don't have it in front of me at the moment" did not mean "I don't have a paper print out of it" but "I ...
My thought was that if you have the ability to send an email, you have browser access. Sure, there are people who do not but they are probably less than 5% of...
dave wrote "He is not able to get the circuit to run with a level of reproducibility and ... the use of the 7555or a 555 to build a charge pump is a proven...
The IR2117 and 2108 have a charge pump in it are IC special made for to work on high voltage to put the power in the gate of the mosfet. I have asked my self...
Hi guys... Last night I couldn't sleep. Seeing the wear out rate of my machine ended up in nightmares (50%) for me which leaded me to design a very simple...
I have been thinking about a pulsed EDM for quite some time. The biggest challenge I see on a pulsed design (as opposed to a classic RC) is how to get...
I know see my circuit I have uploaded. It will totally stress out the IGBT. But perhaps with proper heat sink it will work. Current limiting with resistor is...
Franz, It seems that the IGBT can handle a nominal current of 32 A and a peak current of 70 A, so why do you think you will stress out the IGBT completely?...
Thanks. Well yeah. I haven't done any real computations for my design. I rather keep it in a safe level rather than spending time computing for the limit...
Franz, The darlington is going to suffer from the pain if you do not drive it into saturation. Junction transistors have a saturation voltage of less than a...
Actually, one of the limits of a darlington is that technically, while you can drive it "on" to act switch like, it (the output transistor of the pair) can...
Guys well how about the capacitors placed in parallel to the generator. I read the link of the book in the previous page. It says not to mix RC and Pulse...
Does anyone have a good source for lead screws (precision or?) before I give up and order some plain ol' 3/8-24 threaded rod? Thanks for your help. Jerry King...
There is nothing wrong with 3/8-24. I've used it as a good lead screw thread in a number of projects in the last few years. Mind, if you are buying threaded...
Depends what you mean by "good". McMaster Carr has various precision threaded rod stock...but may not be in your price range. Check out: www.mcmaster.com ...
... A threaded rod is really NOT a lead screw! A ' v ' form thread is not a good form for accurately transmitting motion. Use an acme thread - its much better....
... Well - I can hand feed a cutter quite well - does that make my hands lead screws? Hmmmmmmm - maybe not. Just because something can be done doesn't mean...
Seems to me: A lead screw is, in fact a screw. A screw has a thread. A lead screw is a kind of rod. A lead screw of a length that can be cut to another...
... It might be an exercise in semantics if all thread forms were equal. They are not! Some are better for some purposes than others. For transmission of ...
This is the big reason why I prefer my hydraulic ram system instead of a DC motor and leadscrew. Why don't you just buy a hydraulic system instead of buying an...
I have been intrigued by Steve's circuit for some time now. His one posted circuit has no doubt kindled interest in EDM where it never would have been, 'cause...
I'm wondering what the point is of going with a coarse pitch lead screw over a fine pitched SAE thread form. My lead screw is a 3/8-32 running in a brass lead...
I remember an article probably from The Amateur Scientist that dealt with making a lead screw for ruling diffraction gratings. I believe they made a long screw...
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