Re: LOOKING for homeshop EDM or its power supply?

wow, It is a very slow process? so does it run 1" every 15 minute? I
did not know EDM was that slow.. Could you tell how the speed on
these machine are rated. I heard they are rated in inches square per
minute..


Luis ..


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Marcus and Eva"
<implmex@a...> wrote:

> Hi Luis:
> Commercial sinker EDM requires a very expensive dielectric oil

and

> equally expensive electrode material.
> I paid almost $500.00 just to fill my tank, and about $300.00 for a
> tellurium copper plate 1" thick by 6" wide by 12" long.
> The oil gets contaminated over time and needs to be disposed

of...another

> 100 bucks or so.
> If you get into graphite electrodes, your material cost is even

higher, and

> you need expensive dust management capability.
> Maintenance on these machines is very expensive too...a new servo

valve is

> upwards of $2000.00.
> But these tools can work miracles if you build injection molds.
> I simply can't do without my machine anymore; it paid for itself on

the

> first mold I built with it.
> With regard to your question about speed; EDM is not a fast process

for

> removing lots of metal.
> My machine is very small...only 20 amps, but it can burn a slot

0.100" wide,

> 0.100" deep, and 1.0" long in about fifteen minutes on a coarse

setting with

> copper electrodes.
> A heavier machine can improve on this a bit, but not all that much

unless

> the power supply is very sophisticated.
> Modern CNC EDM's achieve their performance by continuously

monitoring the

> spark gap conditions and adjusting them on the fly, but they are

very

> expensive machines...hundreds of thousands of dollars for a high end
> machine.
>
> Cheers
>
> Marcus
>
> ----- Original Message -----
> From: "luisguillermo98" <luisguillermo98@y...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Tuesday, July 15, 2003 8:01 PM
> Subject: [CAD_CAM_EDM_DRO] Re: LOOKING for homeshop EDM or its

power supply?

>
>
> > Expensice to run? could tell me more about this? is it take a lot
> > energy to run?. what about speed?
> >
> > Luis ..
> >
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Marcus and Eva"
> > <implmex@a...> wrote:
> > > Hi Luis:
> > > I just went out and bought one!!!
> > > I looked at the plans from Robert Langlois in Home Shop

Machinist (

> > I still
> > > have the compiled articles) and I decided that it would be

cheaper

> > to buy an
> > > E-Bay special.
> > > I was right, I think.
> > > They are available for less than a CNC'ed Sherline.
> > > Everyone is dumping their manual machines and going with CNC
> > versions (those
> > > who are still in business, given the way our manufacturing

economy

> > is being
> > > gutted) so a manual machine can be picked up for incredibly low
> > prices.
> > > I've seen ones go for under $1000.00.
> > > I can't buy the materials to make one for that!!!
> > > A good one for the HSM is the Hansvedt 150 B; it's a nice little
> > benchtop
> > > machine with a very nice control for its time.
> > > It is capable of good fine burns with copper electrodes (Trust
> > me....you
> > > don't want to get into machining graphite electrodes in an HSM
> > environment).
> > > Just be aware that EDM is expensive to run, and stinky.
> > > Hydraulic machines are also quite noisy.
> > > Cheers
> > >
> > > Marcus
> > >
> > > ----- Original Message -----
> > > From: "luisguillermo98" <luisguillermo98@y...>
> > > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > > Sent: Monday, July 14, 2003 7:08 AM
> > > Subject: [CAD_CAM_EDM_DRO] LOOKING for homeshop EDM or its power
> > supply?
> > >
> > >
> > > > Has anyone know where to find EDM machines for the hobbist?.

What

> > is
> > > > the difference between the power supply that comes with EDM
> > machines
> > > > and the normal power supply we know?. Is there any website in
> > how to
> > > > build one of this machines?
> > > >
> > > >
> > > > Luis...
> > > >
> > > >
> > > >
> > > >
> > > > Addresses:
> > > > FAQ: http://www.ktmarketing.com/faq.html
> > > > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > > > 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@a...,
> > > timg@k...
> > > > Moderator: pentam@c... indigo_red@q... [Moderators]
> > > > URL to this group:

http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

> > > >
> > > > 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

> > to be 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.
> > > >
> > > > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY
> > POSTING THEM.
> > > DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> > > > bill
> > > > List Mom
> > > > List Owner
> > > >
> > > >
> > > >
> > > > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> > > >
> > > >
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > 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@a...,

> timg@k...
> > Moderator: pentam@c... indigo_red@q... [Moderators]
> > URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> >
> > 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

to be 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.
> >
> > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY

POSTING THEM.

> DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> > bill
> > List Mom
> > List Owner
> >
> >
> >
> > Your use of Yahoo! Groups is subject to

http://docs.yahoo.com/info/terms/

> >
> >