[EMS Discuss] Vacuum Former Update

Rick Osgood rick at richardosgood.com
Fri Feb 14 11:15:13 PST 2014


I'd be happy to just put some Peeps in a glass vacuum chamber.  That sounds
fun.


On Fri, Feb 14, 2014 at 11:13 AM, Bob Miller <kbob at jogger-egg.com> wrote:

> Thin film deposition is another fun thing to do in a vacuum.  You can
> make dichroic glass that way, among other things.
>
> Wikipedia mentions that 1.0e-4 Pa is good for vacuum deposition.
> Atmospheric pressure is 1.0e+5 Pa, so that's nine orders of magnitude
> less pressure.
>
> http://en.wikipedia.org/wiki/Evaporation_(deposition)
>
>
> On Fri, Feb 14, 2014 at 11:01 AM, Rick Osgood <rick at richardosgood.com>
> wrote:
> > When you say ~.025mm/mercury are you saying you need almost a complete
> > vacuum?  Like 30 inches of mercury? I haven't used the vacuum much, and I
> > don't have much experience with them.  But we were able to pull a vacuum
> of
> > 29 inches last night and that's in two large propane tanks with all the
> > hoses.  I suspect that it could pull pretty close to 30hg if your vacuum
> > chamber is smaller.  Of course the closer you get to 30 the slower it
> goes.
> >
> >
> > On Fri, Feb 14, 2014 at 10:58 AM, Benjamin Hallert <ben at vipmail.com>
> wrote:
> >>
> >> I'd need ~.025mm/mercury vacuum.  I've wanted to build a
> Farnsworth/Hirsch
> >> inertial electrostatic confinement fusion reactor for years, and once
> in a
> >> while the bug comes back to bite me.
> >>
> >> Anyone here ever build one?  I suppose I should probably start a
> separate
> >> thread for that at some point, right now I'm still sourcing materials
> to see
> >> if I can afford it.
> >> - Ben
> >>
> >>
> >> On Fri, Feb 14, 2014 at 10:50 AM, Rick Osgood <rick at richardosgood.com>
> >> wrote:
> >>>
> >>> Aren't you a little short for a storm trooper Ben?  I'm not sure what
> you
> >>> mean by hard vacuum so I don't really understand your question.  Can
> you
> >>> describe to me what you mean in more detail?
> >>>
> >>>
> >>> On Fri, Feb 14, 2014 at 10:48 AM, Benjamin Hallert <ben at vipmail.com>
> >>> wrote:
> >>>>
> >>>> Don't forget about storm trooper armor! That's the main purpose for
> >>>> these vacuum formers, isn't it? :-)
> >>>>
> >>>> Hey quick technical question about vacuum... Is this a roughing pump? Or
> >>>> is it capable of drawing a fairly hard to vacuum if you make the time
> >>>> investment? I have a project I've been thinking about for a few years
> and
> >>>> access to hard vacuum is a prerequisite.
> >>>> - Ben
> >>>>
> >>>>
> >>>> On Fri, Feb 14, 2014 at 10:45 AM, Bob Miller <kbob at jogger-egg.com>
> >>>> wrote:
> >>>>>
> >>>>> So now we need a large format CNC router to carve those Pokemon
> >>>>> character shapes. (-:
> >>>>>
> >>>>> On Thu, Feb 13, 2014 at 9:22 PM, Rick Osgood <rick at richardosgood.com
> >
> >>>>> wrote:
> >>>>> > We didn't actually form anything because we can't run the heater.
> But
> >>>>> > you
> >>>>> > can make a mold out of wood or foam or pretty much anything you can
> >>>>> > carve to
> >>>>> > a specific shape. It just has to be heat resistant enough to not
> melt
> >>>>> > with
> >>>>> > the molten plastic sheet touches it.
> >>>>> >
> >>>>> >
> >>>>> > On Thu, Feb 13, 2014 at 9:16 PM, Bob Miller <kbob at jogger-egg.com>
> >>>>> > wrote:
> >>>>> >>
> >>>>> >> Cool! How do you make a mold?
> >>>>> >>
> >>>>> >> On Thu, Feb 13, 2014 at 8:08 PM, Rick Osgood
> >>>>> >> <rick at richardosgood.com>
> >>>>> >> wrote:
> >>>>> >> > I just wanted to send out a quick update about the vacuum former
> >>>>> >> > project.
> >>>>> >> > Tonight we got the vacuum system up and running! And it works!
> It
> >>>>> >> > took
> >>>>> >> > about 2-3 minutes to pull a vacuum that registered as 29 inches
> of
> >>>>> >> > mercury!
> >>>>> >> > (30 is a complete vacuum and he recommends at least 27 for a
> good
> >>>>> >> > vacuum
> >>>>> >> > former system). It may have pulled more if we let it go longer,
> >>>>> >> > but we
> >>>>> >> > didn't test it.
> >>>>> >> >
> >>>>> >> > This gives me great hope for our vacuum system. There is a slow
> >>>>> >> > leak
> >>>>> >> > from
> >>>>> >> > somewhere(s) but I'm not sure it will present a problem since we
> >>>>> >> > don't
> >>>>> >> > need
> >>>>> >> > the tanks to hold a vacuum for longer than a few seconds. We
> might
> >>>>> >> > be
> >>>>> >> > able
> >>>>> >> > to squeeze a bit more performance out of it if we can fix the
> >>>>> >> > leaks
> >>>>> >> > though.
> >>>>> >> > I intend to put up a blog post with some photos and hopefully a
> >>>>> >> > video
> >>>>> >> > clip
> >>>>> >> > this week. Keep your eyes peeled.
> >>>>> >> >
> >>>>> >> > Next step is to build the front control panel and get everything
> >>>>> >> > mounted
> >>>>> >> > to
> >>>>> >> > it. I intend to have this completed by the end of March.
> >>>>> >> >
> >>>>> >> > Rick
> >>>>> >> >
> >>>>> >> > _______________________________________________
> >>>>> >> > Discuss mailing list
> >>>>> >> > Discuss at eugenemakerspace.com
> >>>>> >> >
> >>>>> >> >
> >>>>> >> >
> http://eugenemakerspace.com/mailman/listinfo/com.eugenemakerspace.discuss
> >>>>> >> >
> >>>>> >>
> >>>>> >>
> >>>>> >>
> >>>>> >> --
> >>>>> >> Bob Miller K<bob>
> >>>>> >> kbob at jogger-egg.com
> >>>>> >
> >>>>> >
> >>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> Bob Miller K<bob>
> >>>>> kbob at jogger-egg.com
> >>>>> _______________________________________________
> >>>>> Discuss mailing list
> >>>>> Discuss at eugenemakerspace.com
> >>>>>
> >>>>>
> http://eugenemakerspace.com/mailman/listinfo/com.eugenemakerspace.discuss
> >>>>
> >>>>
> >>>
> >>
> >
>
>
>
> --
> Bob Miller                              K<bob>
>                                         kbob at jogger-egg.com
>
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