Re: EDM, was Re: Cheap Encoders

Hi Tim
Well its a long story !
The machine i have is the result of about 5yr. of design and dev.
This machine will do some very fine work and i use it for making
plastic injection molds.
It has adj. on off times as well as adj. power settings.
The ram is powered by a small stepper with a small belt reduction set up,
so each step moves the ram down a very small amount.
A op amp ckt. looks at the voltage across the gap while the machine is cutting.
this in turn tells the ram stepper to go lower or to backup.
I can keep yoking but it may be boring if i do.
so if you would like any other info. just ask--- if the interest is their i can answer
just about any question on edm that you might have.

Pit falls and dangers
use only edm oil in your mach. ------Fire
only edm in a sumerged tank of oil with a min. of 1" oil covering part
edm power supplies---use a step down transformer 60v is ideal.
best electrode mat. ---- graphite

I guess the bottom line would be ----edm mach. can be very simple or very
complex---it all depends on the work you plan to do.

Scott Acorn
Tim Goldstein wrote:

> From: "Tim Goldstein" <timg@...>
>
> Welcome aboard Scott,
>
> I have an interest in the EDM stuff. I have the book from The Home Shop
> Machinist and was starting to collect the parts based off that.
>
> Any helpful hints or particular pitfalls to avoid??
>
> Tim
> [Denver, CO]
>
> > -----Original Message-----
> > From: Scott Acorn <sacorn@...>
> --snip--
> > i`ve designed and bult a number of things that might be of interist to
> > all of you. thay include a e.d.m,and also a dro.
> --snip-->
>
> --------------------------- ONElist Sponsor ----------------------------
>
> Get $20 off all MotherNature brand products!
> <a href=" http://clickme.onelist.com/ad/mothernature1 ">Click Here</a>
>
> ------------------------------------------------------------------------
> Welcome to CAD_CAM_EDM_DRO@...,an unmodulated list for the discussion of shop built systems in the above catagories.
> To Unsubscribe, read archives, change to or from digest.
> Go to: http://www.onelist.com/isregistered.cgi
> Log on, and you will go to Member Center, and you can make changes there.
> bill,
> List Manager