Anyone play around with designing a cap for a soda bottle?  There is one on Thingiverse, in OpenSCAD, which does not appear to be correct, and which is done "by hand", rather than using the threading libraries that are available.  The data I've found is daunting: http://www.imajeenyus.com/mechanical/20120508_bottle_top_threads/28mm-ISBT-PCO-1881-Finish-3784253-17.pdf https://cnocoutdoors.com/blogs/blog/lets-talk-about-threads I'm working on taking air from a pressurized 2 L bottle to drive an air turbine Thanks! Jon

Does this do what you want? https://github.com/revarbat/BOSL2/wiki/bottlecaps.scad -- Sent from: http://forum.openscad.org/

Adrian: Amazing!  I already had it on my computer but did not know it! Thanks! Jon On 4/19/2020 8:29 AM, adrianv wrote: > Does this do what you want? > > https://github.com/revarbat/BOSL2/wiki/bottlecaps.scad > >

What is the reason for the gaps in the bottle thread? On Sun, 19 Apr 2020 at 13:39, jon <jon@jonbondy.com> wrote: > Adrian: > > Amazing! I already had it on my computer but did not know it! Thanks! > > Jon > > On 4/19/2020 8:29 AM, adrianv wrote: > > Does this do what you want? > > > > https://github.com/revarbat/BOSL2/wiki/bottlecaps.scad > > > > > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

 Adrian:

 Amazing!  I already had it on my computer but did not know it! Thanks!

 Jon

 On 4/19/2020 8:29 AM, adrianv wrote:

I believe it is to allow gas to escape slowly rather than all at once, or to reduce spray.  But I'm guessing. On 4/19/2020 8:54 AM, nop head wrote: > What is the reason for the gaps in the bottle thread? > > On Sun, 19 Apr 2020 at 13:39, jon <jon@jonbondy.com > <mailto:jon@jonbondy.com>> wrote: > > Adrian: > > Amazing!  I already had it on my computer but did not know it! Thanks! > > Jon > > On 4/19/2020 8:29 AM, adrianv wrote: > > Does this do what you want? > > > > https://github.com/revarbat/BOSL2/wiki/bottlecaps.scad >