Re: [CAD_CAM_EDM_DRO] Re: floating aluminium

MRI's need to be super-cooled? He he he, they'd look much better that way
with the fluid mystically boiling off in big clouds. I heard of a team
managing to put together a super-conductor that works very close to room
temperature, there was even one in Focus that claimed to have one at room
temperature and was investigating it to be sure. How is there such a massive
current/field at zero volts and zero ohms? I mean, why is there any force on
the electrons to move if there is no difference from where they're at and
where they're going? I take it electrons have to move through some
resistance to produce a magnetic field or else capacitors would be
incredibly big magnets wouldn't they? In school we did a thing about
magnetism, as well as those damned elastic bands, and we listed one of the
factors affecting it as resistance in the wire. I realised after I sent that
someone would point out that the field didn't have to move if the object
did, shucks... I'm slow. I know I must be wrong somewhere because the
Japanise Maglev trains use super-conductors and I've seen super-conducting
discs floatings at critical temperatures, that might just be because they
can be made from magnetic materials though. This is getting pretty far off
CNC, it's all one big learning expirience being on here. CNC to X-Rays to
space elevators to MRI's all the way through to small female cockroaches and
they're noses.

Best wishes,
John H.

N.B: I wrote to ESAB here in the UK telling them something was wrong with
their site and jokingly asked if I had won a welder for my effort. They
replied and very seriously referred me to someone else from ESAB to ask them
instead, there might be an oppertunity in there. :-) It's worth a try is my
theory, I wouldn't refuse a £3500 Tig set myself.

> Tony:
>
> In an MRI you don't need to pulse the field. The field is a static

coil

> with a superconductor wire carry'ing 750AMPS at zero ohm's and zero volts.
> The field lines are so dense that just the aluminum starting to fall is
> cutting enough lines to generate the current.
>
> Art
> ----- Original Message -----
> From: <info.host@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Thursday, June 07, 2001 9:33 AM
> Subject: Re: [CAD_CAM_EDM_DRO] Re: floating aluminium
>
>
> > The field must alternate or pulse through a curve for a current to be
> > induced in the bit of metal in the way, like in a transformer. There is

a

> > guy with a web page Sam Barow or something on the net who really loves
> this
> > kind of thing (He calls his site the Sam something Power Labs if you

want

> to
> > find it). He makes coil guns etc for a hobby and has a video just like

the

> > one you just described where he fires a metal disc into the roof of his
> > shed. You could mill that metal disc if you wanted to. :-)
> >
> > John H.
> >
> > > I remember from my school physics classes a similar demonstration, but
> > with
> > > an alternating field. The apparatus was a U-shaped iron armature,

with

> a
> > > coil on one arm & an aluminium ring dropped over the other arm. When
> the
> > > coil was energized with mains AC, the aluminium ring shot upwards off
> its
> > > arm of the the armature, hitting the ceiling. Great fun!
> > >
> > > Regards,
> > > Tony
> > >
> > >
> > >
> > >
> > > Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the
> > discussion of shop built systems, for CAD, CAM, EDM, and DRO.
> > >
> > > 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@...
> > > Moderator: jmelson@... timg@... [Moderator]
> > > URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> > > bill,
> > > List Manager
> > >
> > > FAQ: http://www.ktmarketing.com/faq.html
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
> > >
> >
> >
> > Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the
> discussion of shop built systems, for CAD, CAM, EDM, and DRO.
> >
> > 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@...
> > Moderator: jmelson@... timg@... [Moderator]
> > URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> > bill,
> > List Manager
> >
> > FAQ: http://www.ktmarketing.com/faq.html
> >
> > Your use of Yahoo! Groups is subject to

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

> >
> >
>
>
> Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the

discussion of shop built systems, for CAD, CAM, EDM, and DRO.

>
> 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@...
> Moderator: jmelson@... timg@... [Moderator]
> URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> bill,
> List Manager
>
> FAQ: http://www.ktmarketing.com/faq.html
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>