Re: [CAD_CAM_EDM_DRO] Re: EDM machine

I my self am making his EDM I just started looking for
the caps Now are you saying the the should be lower
instead of 100ufX150volts . So if one used 50uf X XXv
would make a better spark

John
Trying my best

--- ptengin@... wrote:

> In a message dated 10/30/00 10:11:18 PM Hawaiian
> Standard Time,
> chyde@... writes:
>
> << However, my current interest is in EDM which
> doesn't seem to be a topic at
> present,
> has this area already been exhausted?
>
> I am currently building the HSM Robert Langlois
> version of a spark erosion
> m/c and would dearly love to hear from anyone that
> has improved upon this
> design. In particular, in relation to the type of
> capacitors used (I'm using
> conventional electros but feel paper would be better
> if available) and also
> in relation to the
> use of fast switching (using power MOSFETS) to
> improve performance and
> reduce the capacitance values required.
>
> Any information would be greatly appreciated.
>
>
> Chris Hyde,
> Melbourne, Australia
>
> >>
>
> Chris,
> I built the same EDM power supply you talk of. I
> never did build the
> stepper side of it. I like Jon E. use a rotating ,
> insulated tube or brazing
> rod as an electrode. I then run this in my
> Bridgeport spindle with a
> comutator type setup. I gotta agree that the mystery
> in the commercial units
> is exactly what they do to reduce the "flash" but
> get respectable cutting
> rates. I agree, the capacitor charge time must be
> reduced, and the
> capacitance values need to be lower as the existing
> setup can blow holes
> through thin stock. Run at 400 hz or something? I'm
> NOT an electronics guy.
>
> Peter
> THRD, Inc.
>

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