Be afraid...

[Martin]

Most of the local hacker spaces have plastic FDM 3D printers but that is
not very high tech as 3D printing goes.  Nova-Labs in Reston might be a
good place to visit.

Martin


On Wed, May 8, 2013 at 12:52 AM, Alex Fraser <beatnic at comcast.net> wrote:

>  I used to be a machinist. Sometimes people would complain about the cost
> of machining a part and I'd tell them that they should have made the
> metal in the right shape to start with.  I guess they have started doing
> that now. Is there anyplace in the DC area that is doing this high tech 3d
> printing?  I'd like to see it (and pick through the scrap pile!).
>
>
> On 5/7/2013 11:46 PM, Mike O'Dell wrote:
>
> Do not confuse the Makerbot Replicator with production 3D printers
> operated by service bureaus.
> My understanding is that the "printed gun" was produced at a service
> bureau.
>
> Some 3D printers can produce metal parts using laser sintering or laser
> fusion of metal "dust".
> NASA is going to flight-test laser-fused components of the J-2X rocket
> engine done with a 3D printer.
>
> Other 3D printers use UV-induced polymerization of resins and the
> resulting structures are
> highly cross-linked. Mix some carbon nanotubes in with the resin and the
> resulting composite
> can have remarkable properties.
>
> Given that the modulus of elasticity of unidirectional carbon fiber is
> *far* in excess
> of stainless steal, filament-wound or tape-wound structures are readily
> capable
> of containing the pressures significantly in excess of that in handguns.
> Solid-fuel rocket engine casings are one such example.
>
> I am not particularly surprised that this is doable, knowing how
> aggressively
> the 3D printing competitors are advancing the state of the art. You won't
> have
> a really good one at home any time soon (unless you are a serious
> experimenter
> of the sort that, in an alternate universe, would spend $30-50 Grand on a
> world-class contesting station), but you can have a 3D printer which is
> the equivalent
> of the "5-tube wonder" AM radio. It's not all that far to TV, FM Stereo,
> and Ham Transcievers.
>
> This is one of those things I'm not about to bet against. I might not get
> the "when" right,
> but the "if" is much more likely than not.
>
>    -mo
>
>
>
>
> Chip Fetrow wrote:
>
> I am willing to buy a 3D printer, and print out a gun, if you will agree
> to shoot it.
>
> This goes way back to the early days of Glock Pistols, where Jack Anderson
> was stating they were made of plastic,  There were not.
>
> There is no way any plastic, especially plastic squirted out of a 3D
> printer, could ever contain the pressure of a firearm cartridge.
>
> This is just STUPID!
>
> --chip
>
> On May 6, 2013, at 10:01 PM, tacos-request at amrad.org wrote:
>
> Message: 1
> Date: Mon, 06 May 2013 16:48:15 -0600
> From: Joseph Bento <joseph at kirtland.com> <joseph at kirtland.com>
> To: tacos at amrad.org
> Subject: Re: Be afraid...
>
> On 5/6/2013 7:20 AM, Phil wrote:
>
> It had to be done? 3D printed firearms.
>
> http://www.bbc.co.uk/news/science-environment-22421185
>
> Phil M1GWZ
>
>
> To avoid alienating myself from many of my friends, I'll only comment by
> saying that not all advances in technology benefit the human race.
>
> Joe, N6DGY
>
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