Wobble Ring Stepping Motor V2!! by Ndrew

Last crawled date: 3 years ago

This is a snap together version (some glue) of my printable motor. It has been shrunk and uses only 9 pieces, air pistons included.
The bellowPiston part is printed with no infill and needs to be airtight. When inflated it extends outward to push the glued on bellowLink part. The bellowLinks then push the wobbleRing, meshing with the drivenGear. Each piston is inflated and deflated sequentially to "step" the motor 4 degrees forward or backwards.
This thing is the successor to this:http://www.thingiverse.com/thing:33853
And uses sgcg's fastener libraryhttp://www.thingiverse.com/thing:15915
Also uses mechadense's epi-hypocycloids from:http://www.thingiverse.com/thing:28237
The bellows used are modeled after this general shape:http://www.f295.org/main/content.php?120-Paper-Gaffer-s-Tape-Bellows
Though I hope this latest version shows much improvement, I realize there is always room for better design. Please, chime in if you see room for improvement.
I also have to mention that I have not printed this yet, so I don't know if it will work. Of biggest concern are the bellowPiston parts, because they need to extend at least 2mm to be productive. I also don't know how easy it will be print 45 degree overhangs that are airtight AND slightly flexible.