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