Re: [DIYbio] Re: Open-source CAD

On Sun, Jan 25, 2015 at 1:21 PM, Tom Hodder <tom@limepepper.co.uk> wrote:
> While learning something about brlcad has been on my todo list for several
> years now :-( I think there is an argument about getting behind the project
> that seems to have the most potential.
>
> At the moment that project seems to be freeCAD.

Except that everyone says it crashes often, and that fixing those
crashes is very hard to maintain and fix bugs for.

As far as 'most potential' the U.S. military began BRLCAD and pumped
lots of money into and, and probably still does (though I can't tell
which of the active developers are paid). It is also 'industry proven'
in that the military here has been using it for 20+ years, and still
does. I think the main problem is simply that they don't have a 'for
dummies' guide (they even acknowledge this in a section of their
wiki).

I'll try to change that if I can, so far I'm pretty happy with it. I
just finished a model of the outside of a small geared stepper motor.
This week I'll be working on adding it to another model, and probably
work on converting my other microfludics-cad examples to use my
brlcad-python-tcl backend too.

For slicing, I'll either export a nice quality STL, then use an
existing slicer application... or write up a slicer using a thin rpp
(rectangular parallel epiped, a.k.a. a rectangular box) and a boolean
intersection (I think this might work) then exporting the result as
something for doing lithograph with (either G-code or a top-view PNG
image, I think).

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