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Trefoil Knot - Version 02 — image 1
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Trefoil Knot - Version 02

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In knot theory, a branch of mathematics, the trefoil knot is the simplest example of a nontrivial knot. [Wikipedia]

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Model information

License
Creative Commons — Public Domain

This is my second experiment in designing a trefoil knot.

Printing

The version I show here is printed at 50% scale in PLA. Unlike my previous version, this one has a “skin.” Use the gcode or 3mf file to print a similar version in PLA. Alternatively, you can try other fill settings, etc. to create your own version.

Additional Notes :  

  • I recommend using supports to keep the print stuck to the bed (rafts did not work for me) 
  • This version printed nicely with no defects

CAD

 

Since making my initial design, I have improved the CAD files by adding additional parameters for modifying the basic design.  In addition, I have created additional “profiles” (the shape of  a cross section of the loop), which can also be modified parametrically.

The OnShape 3D CAD files here :

https://cad.onshape.com/documents/f36468084e28f8df8fa36937/w/4ddd1ec94fcc3fbe8bf684cd/e/e203757048166706b080d91a