Simple Christmas Pyramid 3D Printer Model Free Download

Description Files (6)

Summary

another christmas / winter themed design
modeled in fusion360
inspired by traditional german christmas pyramids (https://en.wikipedia.org/wiki/Christmas_pyramid)
simple, minimalistic approach
powered by rising/moving air from a heater / radiator / etc
do not use open flames!
uses a small magnet and some steel balls as a rotational bearing
there are model versions for 13mm steel balls, and 1/2" steel balls ("_inch")
the arc base structure consists of 3 parts glued together, make sure to sand the contact surfaces flat to make the assembly easier
ther are model versions for D10xH3mm and for D8xH3mm cylindrical magnets
you need to print "base" 3 times and one "bladering"
model units are [mm]
https://youtu.be/Eks_HvOsT2U

Edit 20171203

after a few weeks, the steel balls creating the rotational joint seem to have flat spots which increase friction and stop the rotation of the bladewheel
I added a very small steel ball (one from a 608 skate bearing) in between to decrease magnetic forces and minimize contact area
It works better than before and spinns and spinns and spinns
might not work for everybody, depends on how strong your magnets are