Perpendicular Slotted Ellipses by wtgibson 3d model
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Perpendicular Slotted Ellipses by wtgibson

Perpendicular Slotted Ellipses by wtgibson

by Thingiverse
Last crawled date: 3 years ago
These are interesting because as they roll, the center of mass remains a constant height above the table! This means they roll smoothly, and have no desired resting position (unless material is >2mm thick)
From the excellent book "How Round Is Your Circle".
Blog posts:wgprojects - perpendicular-rolling-ellipses
[wgprojects - perpendicular-rolling-ellipses-2](http://wgprojects.blogspot.com/2014/07/perpendicular-rolling-ellipses-2.html )
Animation in OpenSCAD works quite well; much more obvious than when using Customizer.
I wish Thingiverse supported gif animations - check out my blog to see some.

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