Rocking knot

myminifactory

This knot boasts a unique feature: Regardless of how it is positioned on the surface, it always rests in contact with no more than two points. As a result, the knot glides smoothly back and forth and can roll down even very shallow slopes. It's an entertaining item to have at your desk and makes for a great introductory gift to 3D printing. Files for both thick and thin versions are included here. For detailed information and step-by-step instructions about this object, visit MakerHome, Day 110: http://makerhome.blogspot.com/2013/12/day-110-rocking-knot.html UPDATE: kitwallace has developed a method to create closed parametric curves like this one using OpenSCAD. This approach resolves some meshing issues at the join point; see "Rolling Knot" at http://www.thingiverse.com/thing:230557 MORE UPDATE: kitwallace has further improved his design and shared a detailed account of the process on his blog: http://kitwallace.tumblr.com/post/74713917178/openscad-revisited Twitter: twitter.com/mathgrrl Hacktastic blog: mathgrrl.com/hacktastic Shapeways geekhaus store: shapeways.com/shops/mathgrrl This design and all associated images and files are licensed under the Creative Commons Attribution Non-Commercial Share Alike license. If you wish to use designs, images, or files outside of this license's terms, please email request@mathgrrl.com.