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

Tue Apr 7 15:25:54 EDT 2015

wreckdiver at frontiernet.net

Al Secor

--------------------------------------------
On Tue, 4/7/15, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] 3D Printer plans for CO2 Scrubber
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Date: Tuesday, April 7, 2015, 3:01 PM

 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, 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
 >>
 _______________________________________________
 >> Personal_Submersibles mailing list
 >> Personal_Submersibles at psubs.org
 >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
 >
 >
 _______________________________________________
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