[TheForge] 3D printers

Tue May 12 15:08:41 EDT 2015

Richard: You caught my attention with the Mu metal shield comment. What do
you do that requires Mu metal shielding? Are we talking an MRI or similar? I
mean is it: component, room or personal shielding?

Dad spun a lot of Mu metal for the space program. I would've kept a scrap to
play with but at the time it was tightly inventoried by the GVT so we had to
account for parts, scrap and shavings. <sigh>

I'd love an induction forge but we lived less than half a block from high
"tension" lines (72,000v transmission lines, 6 per tower) for years when I
was a kid. I used to imagine all kinds of space craft listening to the buzz
when I went to bed. That probably means the damage is long done and I'm
stuck with it.

Jer

-----Original Message-----
From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of
Richardson, Grover
Sent: Monday, May 11, 2015 11:06 AM
To: 'Blacksmithing List Sponsored by ABANA'
Subject: Re: [TheForge] 3D printers

Note- no one has said anything about rfi/emi from the induction coil
heaters.  The coil is an antenna.  Yes, the metal inside gets most of the
power, but a coil radiates pretty well outside of the coil as well.   I
worry.  Nearby electronic watchs, cell phones, could easily be
overwhelmed<G>.   Has anyone done measurements of fields nearby?  We use
mu-metal to shield ourselves from stray fields of high intensity.  

-----Original Message-----
From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Peter
Fels & Phoebe Palmer
Sent: Monday, May 11, 2015 2:22 PM
To: Blacksmithing List Sponsored by ABANA
Subject: Re: [TheForge] 3D printers

I suspect it warped both our thinking and would bet blacksmiths are over
represented in it's ranks.
As an old guy, it makes it easier to deal with the roar of new tech.
Speaking of that. Gene Olsen brought one of the induction forges that Grant
S first introduced, to the Western States Conference. Sure is nifty...Fast,
concentrated heat! 
The price and cooling package is coming within reach and the unit is now
more portable and compact.
I want one!

On May 11, 2015, at 10:38 AM, CGRAF <adveniam at att.net> wrote:

I was picturing just that, only the trucks are self driven and sent to the
site by computer.  Flat lot to finished building before the first Organic
shows up.

Maybe I read too much sci-fi. Then again maybe not.

Mike Graf

On 5/11/2015 12:32 PM, Peter Fels & Phoebe Palmer wrote:
> Imagining the rolling bridge crane rolling down the road to the building
site with a whole parade of feedstock trucks following.
> The examples i've seen were just extruding concrete mixes, but they could
well be laying down insulation inside the walls at the same time.
> Of course it isn't finished till it's printed the roof with gutters, solar
hot water and photovoltaic panels.
> And NO, it's not allowed to print the wrought iron fence, gates, etc!!
> 
> On May 11, 2015, at 7:05 AM, CGRAF <adveniam at att.net> wrote:
> 
> I have to wonder if these things could be built a movable platform
"robots" that would be capable of building something like this as a whole.
> Mike Graf
> 
> On 5/10/2015 12:21 PM, wmullett at bright.net wrote:
>> Architects are experimenting with 3D printing of building components and
the Chinese have actually 3D printed real buildings:
>> http://www.archdaily.com/591331/chinese-company-creates-the-world-s-t
>> allest-3d-printed-building/
>> 
>> Walt Mullett
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