[PSUBS-MAILIST] 3D Printer plans for CO2 Scrubber

Tue Apr 7 11:52:42 EDT 2015

Guys, did this come through for you with the attachments?

Thanks,

Alec

On Mon, Apr 6, 2015 at 11:34 PM, Alec Smyth <alecsmyth at gmail.com> wrote:

> OK, I'm not sure what our attachment limit is, but if it works there
> should be eight stl files attached.
>
> The scrubber consists of two cylinders, with the space between them filled
> with Sofnolime. There is a blind "fixed end" that caps both cylinders, and
> a "removable end" that serves as a lid to the space between the cylinders.
> This removable end is held tight against the scrubber agent in tension by
> two bungee cords. It is thick, so that as the scrubber agent settles the
> removable end can move into the cylindrical space keeping up the pressure
> and preventing the formation of air paths. Because thermal contraction
> makes thick parts challenging to print, there are two files (A and B) for
> the removable end. Print them separately, bolt them together.
>
> The non-printable parts are:
>
> - Two cylinders made of perforated brass sheet. The material for those is
> McMaster item #9360T15. Roll the perforated sheet by hand into two
> cylinders of 1 7/8" and 5 1/4" diameters. I rolled the cylinders with about
> 1/2" overlap and put small pop rivets in the overlap to make a seam. Do
> this AFTER printing, so you can use the printed parts as diameter
> references. Vary the cylinder length as desired to increase or decrease
> Sofnolime capacity. Mine are 12" long.
> - The backup breathing hose is "Bilgeflex" white corrugated bilge pump
> hose from West Marine.
> - A SCUBA 2nd stage rubber mouthpiece.
> - The white external bars parallel to the cylinders and holding them
> together are fiberglass structural rods, McMaster part #8543K53
> <http://www.mcmaster.com/#8543K53>, drilled and with 1/4" SS threaded rod
> inside.
> - The fan is a Delta Electronics BFB0712H, obtainable from Digikey as item
> #603-1118-ND.
> - The rest is just a little bungee cord and a couple of tiny SS screws
> that go through the external and internal stiffeners to hold the outside
> cylinder to them.
>
> For details please refer to the photos on
> http://www.psubs.org/projects/1234567810/printedscrubber/
>
> Permission is hereby granted to all PSUBS members to use this design with
> the caveat that it is experimental and untested kit, and in the hope all
> who use it will also endeavor to improve the design. This is intended to be
> "open source".
>
>
> Best,
>
> Alec
>
> On Mon, Apr 6, 2015 at 3:51 PM, Bob Travis via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Would it be possible to get the stl file?  I just found out that I have
>> access to a 3D printer as well
>>
>> Sent from my iPhone
>>
>> > On Apr 4, 2015, at 7:10 AM, Gregory Snyder via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>> >
>> > Alec,
>> > For the record, you are awesome.
>> >
>> >> On Apr 4, 2015, at 9:00 AM, via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>> >>
>> >> Hi Alec,
>> >>
>> >> Thanks for sharing.  Perfect design for our sub.  Are the part and STL
>> files available to share?
>> >>
>> >> Mark...
>> >>
>> >> ---- Alec Smyth via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>> >>> Hi Mark,
>> >>>
>> >>> See http://www.psubs.org/projects/1234567810/printedscrubber/
>> >>>
>> >>> Jon, perhaps we can make this open source by putting the files out on
>> the
>> >>> website somewhere?
>> >>>
>> >>>
>> >>> Thanks,
>> >>>
>> >>> Alec
>> >>>
>> >>> On Fri, Apr 3, 2015 at 8:49 PM, via Personal_Submersibles <
>> >>> personal_submersibles at psubs.org> wrote:
>> >>>
>> >>>> Hello Psubs group,
>> >>>>
>> >>>> Has anyone built a CO2 scrubber using a 3D printer that would be
>> willing
>> >>>> to share your plans and the STL files?  In return, I would be glad
>> to build
>> >>>> the plastics parts for anyone in the group.  Our 3D printer is
>> capable of
>> >>>> 12" x 12" x 12".
>> >>>>
>> >>>> Thanks,
>> >>>>
>> >>>> Mark...
>> >>>> 910-638-5229
>> >>>> _______________________________________________
>> >>>> Personal_Submersibles mailing list
>> >>>> Personal_Submersibles at psubs.org
>> >>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> >> _______________________________________________
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>> >
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>
>
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