Re: [CAD_CAM_EDM_DRO] build an edm

from where can I get a copy?

Babar


--- James Stevens <jstevens@...> wrote:

> My copy is only 56 pages - less than half of the
> quoted 125 pages. The 56
> pages cover in good detail all the items needed for
> the EDM. He is using a
> unipolar stepper to control the electrode. I've
> seen other designs use
> servos and let the gap voltage control the servo.
> My design is using a
> linear actuator - everyone will have their personal
> preference.
>
> The PS in the book is built from scratch with lots
> of caps - I would just
> pick up some surplus supplies from www.mpja.com and
> save the time and
> hassle. I think he's cutting at 80 or 90 volts - so
> just buy two 48V
> supplies and put them in series and you'll be
> covered for under $100. Then
> you can concentrate on the controls.
>
> I've found that the higher the voltage, the more
> tolerant the cutting is -
> less arcing and shorting. Of course, if you have
> the process automated, it
> won't much matter - the electronics takes good care
> of controlling the gap
> and shutting off the supply when needed.
>
> The book is very complete and provides everything
> you need (although I
> remember hearing people saying that some of the
> follow up [re: Part 6] had
> some component values missing - you should be able
> to back into these)
> including nice hand drawn sketches of how to solder
> and where pin 1 is on a
> chip!. You could certainly follow along and end up
> with a usable piece of
> equipment.
>
> HTH,
>
> James
> ----- Original Message -----
> From: <davemucha@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Thursday, December 12, 2002 7:40 PM
> Subject: [CAD_CAM_EDM_DRO] build an edm
>
>
> > Hi,
> >
> > does anybody have the book
> >
> > Build an EDM by Robert Langlois ?
> >
> > I found different descriptions and it seems the
> 'newest' version has
> > 125 pages.
> >
> > I am interested in how complete the book is and
> how well it covers
> > power supplies.
> >
> > any additional information anyone wants to offer
> is more than welcome.
> >
> > Dave
>
>
>
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