This 3d Print rolls up hill! 

It is a remix of Packeranderson22's design which can be found here: https://www.thingiverse.com/thing:5328915. He has a great explanation of how it works here: 

The Remix

I took Packeranderson22's work and made a few changes to increase the printability of this design and remove the need for glue. The changes I have made are:

• I placed a nut at the base of the cone so that the two pieces can be threaded together, there is a threaded rod provided that will hold them together.
• I flipped it so the ramp prints perfectly flat. This has a huge advantage as it can be printed at a 0.3mm height without effecting its performance. I have also:
  • added a little notch for it to end in so it doesn't run off the end. 
  • removed the joining sections and replaced them with a triangular section that prints as a bridge.

Settings

• Print at what ever layer height you desire. Works great at 0.30mm which makes it a much quicker print.
• Take the first layer slow there are some small little bits for which adhesion can be difficult.
• 0% infill is needed, but add some if you like.