Electrical Discharge Machining - EDM

Andy1845c · Oct 22, 2007

Does anyone here have any experiance in electrical discharge machining?

If you don't know what i'm talking about, heres the wiki artical -
http://en.wikipedia.org/wiki/Electrical_discharge_machining

I have been kinda interested in trying it. Lindsy publications ( **broken link removed** )has a book on how to build a power supply and servo setup, but I was kinda hoping I could find some similar information online for free. No luck yet, but i'm not ready to give up.

Anyone have an information or knowledge of this kind of thing?

dknguyen · Oct 22, 2007

I don't think it's the kind of thing that can be built at home?

jpanhalt · Oct 22, 2007

Hi Andy,

As you probably already know, EDM can do some pretty unusual machining, like removing a very small broken tap from an expensive piece of machining.

I checked Yahoo groups (search: EDM) and found several EDM groups. One that looked particularly interesting is called: EDMHomeBuilders. Good luck. John

Andy1845c · Oct 22, 2007

dknguyen said:
I don't think it's the kind of thing that can be built at home?

According to the lindsay publications book, it is, and has been done. I don't know how accurate a home made setup would be, but it would be fun to play with.

jpanhalt said:
As you probably already know, EDM can do some pretty unusual machining, like removing a very small broken tap from an expensive piece of machining.

I checked Yahoo groups (search: EDM) and found several EDM groups. One that looked particularly interesting is called: EDMHomeBuilders. Good luck. John

Thanks John! I'll check those out!

Krumlink · Oct 22, 2007

Awesome concept, but very complex.

Hope this helps

https://images.google.com/imgres?im...lient=netscape-pp&rls=com.netscape:en-US&sa=N

monkeybiter · Oct 22, 2007

'model engineers workshop' in the uk have run a couple of projects to build spark eroders in the home workshop. if that's no help i'll try and navigate my filing system and see if i can locate a copy. if i do i could post scans if you're interested.

Sceadwian · Oct 22, 2007

Why would a hobbyist need something like this?

Andy1845c · Oct 22, 2007

Sceadwian said:
Why would a hobbyist need something like this?

Its not really somthing I need, more somthing I want to try

Leftyretro · Oct 22, 2007

Sceadwian said:
Why would a hobbyist need something like this?

Hey, I've got tons of stuff I don't really need, but hey it's my hobby

Lefty

spuffock · Oct 23, 2007

Maybe people who ask why one needs something ought to be restricted in some way?
A friend of mine has spark erosion kit in his workshop. The disadvantage is the machining of graphite to make tools for it generates so much dust that the whole place is filthy black.

Andy1845c · Oct 23, 2007

spuffock said:
The disadvantage is the machining of graphite to make tools for it generates so much dust that the whole place is filthy black.

haha, Well, I grind alot of carbide, so I'm used to that kind of thing

JimB · Oct 23, 2007

Sceadwian said:
Why would a hobbyist need something like this?

Why would an electronic hobbyist require:
A soldering iron
A multimeter
A variable PSU
Various signal sources, audio and RF
An oscilloscope
A digital storage scope
A spectrum analyser

Why would a mechanical hobbyist require:
A bench with a vise
A drill press
A bench grinder
A lathe
A milling machine
A shaper
A spark eroder

Why would an avid ornithologist require:
Binoculars
Bigger binoculars
A telecope
Lots of bird books
Green wellies?

Hell, they could all save their money, spend it on beer and pizza and just veg out watching the TV.

Whatever floats your boat.

JimB

HiTech · Oct 23, 2007

The research lab at my place of employment has an EDM unit. Very snappy unit and excellent for fixing or modifying mold cavities for plastic injection molding. The good units are costly too and out of financial reach for most consumers/hobbyists. This is an industry tool, much like a Bridgeport or similar unit is.

Omar.M · Oct 23, 2007

JimB said:
Hell, they could all save their money, spend it on beer and pizza and just veg out watching the TV.

Heck, why do we even need that? Let's just sit on a rock and ponder all day.
Since pondering is good
-Omar

HiTech · Oct 24, 2007

Pondering is good for only so long.... then thetime comes when one has to get off their duff and accomplish something.

Nigel Goodwin · Oct 24, 2007

HiTech said:
Pondering is good for only so long.... then thetime comes when one has to get off their duff and accomplish something.

You mean like trying to find a softer rock to ponder on?.

Andy1845c · Oct 24, 2007

jpanhalt said:
I checked Yahoo groups (search: EDM) and found several EDM groups. One that looked particularly interesting is called: EDMHomeBuilders. Good luck. John

I joined the EDM homebuilder group. Alot of good posts on there! Thanks!

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