Giant Spiky Perko Knot

thingiverse

This knot was created by exporting a model from [KnotPlot](http://www.knotplot.com/) and then adding extrusions to each mesh face in [TopMod](https://www.viz.tamu.edu/faculty/ergun/research/topology/), then printed with an Ultimaker 3 using dissolvable PVA supports (the second picture shows the newly-printed knot in a bucket being filled with water). Inspiration and KnotPlot model are credited by my student Jonathan Gerhard; you can read about his related project on his blog Mathematical ADD here: [The Perko Praxinoscope and the Shrikhande Graph](https://mathematicaladd.wordpress.com/2017/03/20/the-perko-praxinoscope-and-the-shrikhande-graph/). For information about how this model was designed and 3D printed in PLA with dissolvable PVA supports, see our article at Hacktastic: [Giant Spiky Perko Knot](http://mathgrrl.com/hacktastic/?p=4401&preview=true). **UPDATE: Follow along with a reprint of this model in PLA with breakaway supports at our new article at Hacktastic: [Perko Knot Reprint: Dissolvable vs. Breakaway Supports](http://mathgrrl.com/hacktastic/2018/12/8132/).** You can buy a much smaller version of this knot in our [Shapeways shop](https://www.shapeways.com/product/E3JWWSJE3/perko-spikes-knot): <iframe width="625" height="652" frameborder="0" allowfullscreen allowtransparency src="//www.shapeways.com/fragments/product?spin=E3JWWSJE3"></iframe> ===== #####Twitter: [twitter.com/mathgrrl](https://twitter.com/mathgrrl) #####Hacktastic blog: [www.mathgrrl.com/hacktastic](http://www.mathgrrl.com/hacktastic) #####Shapeways geekhaus store: [www.shapeways.com/shops/mathgrrl](https://www.shapeways.com/shops/mathgrrl) *This design and all associated pictures and files are licensed under the [Creative Commons Attribution Non-Commercial Share Alike](https://creativecommons.org/licenses/by-nc-sa/2.5/) license. If you want to use designs, images, or files outside of the terms of this license, please email <request@mathgrrl.com>.*