3D CAD objects and related things for public consumption
3D CAD objects and related things for public consumption
For now, this source tree contains ‘OpenSCAD’ files for things that
I have done that I might deem ‘convenient’ for others to use, at least
as examples for how to use OpenSCAD for 3D Printing.
Some of these files use a ‘shrink factor’ of 1.02 which is based on the
measured behavior of my particular printer using PLA. Your Mileage May Vary.
Some of these are simple gears, demonstrating the ability to create useful
mechanical parts with a 3D printer. The shaft size is actually intended to
be 2mm and not 0.1 inches (it works with my printer). You can purchase 2mm
metal shafts and small motors with this diameter shaft in various places.
If you want the gear to free-spin, increase the hole size by 25 percent or
so, so that it free-spins but doesn’t wobble.
The motor holder is for a particular small motor. You could include this
in your own design to mount a motor. YMMV on size, etc.. And the motor clamp
is designed to hold the motor in place on the motor holder.
For old style radio fans, there’s a ‘coil form’ that you can adjust to fit
whatver kind of coil or core you need. The uploaded version is supposed
to work with a 10mm core cut to about 25 mm (1 inch). YMMV on this as well.
(each of these files has adjustable paramters documented in the code so
that you can customize sizes)
There is also a drawing called ‘eductor’ that is intended to draw a vacuum by
use of pressurized air, or maybe even steam (except that steam softens the
plastic to the point where it might melt or collapse). It should get you a
pressure ratio of about 3:1 (throat to manifold pressure, absolute). You
could have multiple stages to get better ratios, but additional stages would
need higher “moving fluid” flow (i.e. larger nozzle diameter and throat
diameter). This is about the largest I could print on my printer, so if I
staged them, I’d need to make a smaller one for the first stage. Or, you
could make it in sections (bolt the horn together at the narrowest point,
for example). Sections might be better if you do a metal fab so you can
remove any flashing inside the horn.
One of them is of very practical use, a water bottle cap, for multi-gallon
water jugs. The caps on those things go bad for some reason, but the bottles
themselves are perfectly fine. Now you can replace the caps with a 3d printed
version, if you want. YMMV again, due to shrinkage, etc..
For more information on OpenSCAD:
For additional help with 3D Printing, I found these links useful:
https://www.matterhackers.com/articles/how-to-succeed-when-printing-in-pla
and
https://www.matterhackers.com/articles/how-to-succeed-when-printing-with-abs