Hi, does anyone have any real plans which they would not mind sharing, as I would like to make a EDM with 3 axis CNC control, regards Steve
Hi, does anyone have any real plans which they would not mind sharing, as I would like to make a EDM with 3 axis CNC control, regards Steve
3 axis CNC control....Hmmmmm.....the EDm produces the cavity etc by using a formed copper/graphite etc electrode, during which the end is gradually eroded away also, but the cavity formed is the shape of the electrode, unless you mean that the electrode is a square or round section and the form is produced by weaving around a shape under CNC control, which means then that all you need is the EDM circuits and the rest is normal CNC layout?
There are real plans to produce the sparking process, but they are pretty standard anyway.
Ian.
I would also like to build a 4 axis CNC Sinker type EDM.
When I say 4 axis I will use a spindle electrode holder which can function as an orbiter or as a controlled "C" axis - such as might be used to burn transfer ports in the cylinder sleeve of a 2 cycle engine.
3 axis helical moves with a rotating spindle allow "thread milling" type burning of thread forms in full hard materials.
There don't appear to be any functional public domain or open source plans out there. The power stage I will be using is proprietary, don't ask me to give away something that isn't mine to give. As to the control side I have high hopes that at some future point EMC2 can be adapted as the CNC control, but there are many unique to the EDM process issues which will still require much developement.
How do you do that? EDMs of the sinker variety have limitations. You can make threads by using a thread form electrode and a tapped greenboard guide. The Z axis has a rotary head that spins on center, and drives the threaded electrode in and out of the greenboard and into the work. Electrodes wear very quickly compared to a mill. I just don't see how you could make four axis work with a sinker. A wire EDM is different.
This post has been going for a two or three years, has anyone got any comments/feedback on any particular design they have built for a sinker EDM?
Anyone built the http://homebuiltedm.tripod.com ?
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
I have mine 70-80% complete.
It would get done faster if I was able to spend more time at home, but I go where I am paid to go...
I have Ben's book and his PCB - I much prefer using a real PCB vrs perf board or attempting to fab my own PCB.
If I were to my own I would likely use a bigger H-Bridge chip to allow slightly larger servos than the ones suitable for Bens Drawer slide design.
Many members in the yahoo forum have reported successfull builds.
The Key thing about Ben's book is he gets into the details of using the EDM and preaches the gospel of proper flushing... Its way more than a simple how to writeup.
Also - Some day a pulsed EDM follow up book has been promised. :stickpoke
I have both the Langlois and Fleming books. My head is finished but was built with a stepper motor. I ran into trouble making a decent PCB for the stepper control though, so it has sat. After finding the Fleming book with a simpler servo drive, I decided to incorporate both designs into one ideal unit.
Langlois goes into deeper detail for controlling the burn with a capacitor bank that includes larger capacitors. Fleming has the simpler control and goes into detail for an EDM tank. I have everything I need except a PCB board for the control. Because I already made a precision stepper driven head, I'd really prefer to build Langlois' control, but will probably bite the bullet and find some servo that I can cobble to the stepper mount just to get it done.
dear all
please I hope to built EDM machine any body can help me for this project
thanks in advance
gamal
May I have the plans, too?
Thank you very much.
Santafesonido from Argentina
sorry ,the mail
[email protected] tanks you
Hi Gamal, post your email adress and I'll send them to you direct.
They were posted previously in the first one or two pages on this thread.
Ian.
Dear IAN
thank you for answer my mail is ([email protected])
thanks
gamal
I would like to get the plans. By the way, I can offer a book from a Russian that invented the EDM where he explains all the different factors affecting sinking EDM. By the way I also would like to know if any of the plans include an EDM by pulse (not R-C circuit)
[email protected]
Hi gmolteni, The plans are for a straight forward die sinker type that uses a stepper motor drive to peck the form out controlled by the circuit.
If you are familiar with electronics maybe you can modify the circuits and post a plan for an update to the system.
I'll send them as is to your email adress.
Ian.
Hi Handlewanker
Can I also have one of your plan please?
my email address: [email protected]
Thank you very much for the plans Handlewanker.
I found most of the information about EDM very light, not going deep on practical information.
I uploaded a very interesting russian book (english edition of the book) about sink EDM http://www.esnips.com/web/mecanica3
Although the book is rather old, (in fact is one of the first scientifical studies about the subject) is very interesting the way the matter is covered, perhaps it would be useful for someone else.
Hi Handlewanker (Ian)
Can I also have one of your plans too?
my e-mail:[email protected]
I was looking a PDF named "edm-power.pdf" but the output of 7555 goes to nowere ...
something is bad there
See you, and thank you in advance for your plans