Matlab Knot

thingiverse

This user prefers using Matlab over OpenSCAD for creating knot models due to efficiency issues with constructive solid geometry. They developed a new script, VarKnot.m, which creates smoother meshes and takes seconds instead of hours. They printed a [3,1] knot that required more support material than print material but turned out well. The knot design fits a 12.7mm steel ball from a Geomag set, allowing it to freely roll inside without falling out. The script includes other example knot STLs for those unable to run the script. To use VarKnot.m, adjust parameters as desired and import surf2stl.m, which has been modified to export multiple objects in one STL. A vertical stretch parameter allows taller knots with circular cross-sections, while a thickness parameter provides a base area for print attachment. However, there's no guarantee of a manifold mesh, so users must adjust parameters to avoid self-intersection.