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

Tue Apr 7 15:01:25 EDT 2015

Done. Anyone else, please let me know your emails and I'll forward off list.

Best,

Alec

On Tue, Apr 7, 2015 at 2:22 PM, via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Alec,
>
> I did not get any attachments with this thread.  Could you maybe send them
> direct to bobtravis at comcast.net?  I would really appreciate it!!  And I
> too would be happy to make extras or anything else I can do to help the
> group.  I rarely comment or ask questions but I read every email that comes
> through!  This site has been a HUGE help and, if the stars continue to
> shine on me, I will be testing my K boat this year!!
>
> Bob
>
> ------------------------------
> *From: *"Alec Smyth via Personal_Submersibles" <
> personal_submersibles at psubs.org>
> *To: *"Personal Submersibles General Discussion" <
> personal_submersibles at psubs.org>
> *Sent: *Tuesday, April 7, 2015 8:52:42 AM
> *Subject: *Re: [PSUBS-MAILIST] 3D Printer plans for CO2 Scrubber
>
>
> 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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>>
>>
>
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