RE: [CAD_CAM_EDM_DRO] Re: Wire EDM

Thanks for the EDM power supply info, Mdynac. Is it really that
simple? Once you have the switching frequency and pulse width set,
do you just set your power by enabling 1 to 22 current amplifiers?
I would love some more info. How long ago was this system
considered state-of-the-art? How different are modern
state-of-the-art power supplies? How much current is needed? Do
you make your own EDM pulse generators and power supplies?

TIA,

Carlos Guillermo
VERVE Engineering & Design

-----Original Message-----
From: paoli_60175 [mailto:mdynac@...]
Sent: Monday, July 08, 2002 8:26 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: Wire EDM

--- In CAD_CAM_EDM_DRO@y..., "turbulatordude" <davemucha@j...>
wrote:

> Gotta love Google
>
> did a Google search for "Jon Elson EDM"
>
> and got this url
> http://www.artsci.wustl.edu/~jmelson/edm.html
>
> pretty cool huh ?
>
> My question is.... can you use an ARC welding machine ?
> seems the power is there. I just don't know about the power
> regulation.
>
> It also seems that there is a reaction zone as the electrode
> approaches the part the flow begins to increase until metal

starts to

> move. then as the proximity of the electrode and part increase,
> there is a point where there is a small enough gap that the arc

jumps

> with no restriction and a short circuit is created. then you

need to

> pull back and start again.
>
>
>
>Well I would not use an arc welder.....

You should use an adjustable pulse generator...
Mine varies from 5Khz to 52Khz......
and my pulse width is adjustable from 750ns to 2.25us
the width is the on time....
the generator sends this out to an hp2601 opto,
which in turn is applied to current amplifiers via switching
logic...
switching logic is used to enable 22 parallel current amplifiers,
which is switching -200vdc when in open gap....
more info is available...
John Elson rig is crude but effective...no offense John.....

I retrofit older idustrial EDM's with newer machine controls....

have fun,
mdynac


Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/

OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to
reach it if you have trouble.
http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this as
a sister site to the CCED group, as many of the same members are
there, for OT subjects, that are not allowed on the CCED list.



Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com,
wanliker@...
Moderator: jmelson@... timg@...
[Moderator]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
bill,
List Mom
List Owner



Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/