[WA Toolman]

The first EDM I ran was one of the first commercial EDMs out there. That thing had huge vacuum tubes like an old radio station. It appeared to work on the low voltage/high current principle. One feature that I noticed was the "automatic" feeder which used some sort of sensor on the current where if it made solid contact the tool would back up until proper arc was maintained. I'm told this was how early carbon-arc streetlamps worked.
I stumbled across this thread looking for a project and I'm pumped about this one. Stay tuned for further developments.

Personal info: In Jan 2009 I retired after 50+ years in the machinist/tool&die trade. I find I still have to build things.

[bdya]

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.

thanks in advance
:rainfro:

[jlinggar]

Hi Predator, I've got some pages from the Model Engineer that describe a small EDM for home construction and use.
I'll email them to you.
They're pretty basic stuff but if you want to learn about the construction and allied circuitry it'll serve as a start, and if your electronic knowledge is up to it you can adjust the components as you see fit.
Ian.

Hi Ian,

I am new to this forum. I would like to build this edm too, could you also send me your design from the magazine? Here is my email address: [email protected]

Thank you in advance.

Btw, is this design the same as the one you have attached in the earlier post (with 7 jpg pages)?

greetings,
jlinggar

[burt007]

Hi Handlewanker

Can I also have one of your plan please?
my email address: [email protected]

[Castlestone]

Ian,

Please forward me a copy of the plans as well.

Thanks, Mike

[email protected]

[bill south]

Hey Handlewanker;
Would you share the plans with me? [email protected]
Thx.
Bill

[kanton]

Hi Handlewanker

Please send a copy of your plans to my email address: kenanton@ lycos.com.

Thanks

[Mongkol]

Hi Handlewanker,
I am interested this plan,Please send a copy of your plans to my email address: [email protected]

Thanks
Mongkol

[grojas21]

Hi Handlewanker,
I am interested this plan,Please send a copy of your plans to my email address: [email protected]

thanks
Gabriel

[UT8]

Hello Handlewanker,
This is my first post. Would you kindly share the plans with me? My email address is [email protected]

Thank you,
UT8

[MrWild]

All you guys got the plans, has anyone completed it?

[santafesonido]

Hello Handlewanker,Please send a copy of your plans to my email address:[email protected] tanks a lot

[skullworks]

Hi Handlewanker,

May as well add me to your mailing list.

I built Ben Fleming's Servo type sinker generator but am looking into other generators that can put out more useable amps for larger total electrode surface area.

[kheri]

May I also ask for your plans ? My email [email protected]

[handlewanker]

Hi Skullworks, send me your email adress and I'll send them direct to you.

The plans are for a DIY model of quite modest ability so if you want something with a bit more grunt, maybe this is too "Model Maker" type.

Hi Santafesonido, I tried to send the plans to your email adress but got a message saying adress couldn't be found, I'll try again.

If that fails, the plans can be found on the earlier posts on this thread.
Ian.

[kheri]

Thank you handlewanker for emailing your plans.

[chensl]

Hi handlewanker,
Can I also have one of your plan?
My email address is: [email protected]
Thanks

[jimglass]

Here is my sinking EDM. For a downfeed I used a common 90 VDC gearmotor.
A PLC monitors the spark voltage and has the gearmotor go FORWARD/STOP/REVERSE for feeding the electrode.


To see it run click on the link:
http://smg.photobucket.com/albums/v3...EDMworking.flv

http://img.photobucket.com/albums/v3...Mtestspark.jpg

http://img.photobucket.com/albums/v3...rninginoil.jpg

Finished job:
http://img.photobucket.com/albums/v3.../EDMkeyway.jpg

Here is my wire EDM: It is not CNC (Yet). It is also controlled by a PLC.


Control cabinet and power supply cabinet:


Power supply plans came from:
"Build An EDM" by Robert langlois

Available from the Village Press, Inc
Calalog number 97-60656
ISBN Number 0-941653-52-8

The rest was built from my head. I have no drawings of the hardware.

Jim

[kheri]

I saw your pic of the coupling keyway cut with EDM machine. How would you compare if it is cut with a slotter or shaper ? What is the tolerance for fitnest cut with EDM ?

[jimglass]

That slot or keyway was a blind hole. Not likely a slotter or keyway cutter could do it.

EDM always has an overburn of around .006 per side so you make the electrode undersize accordingly.

Jim