3D Printing
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Day 153 – Stick and lattice trefoil knots
Day 153 – Stick and lattice trefoil knots 640 480 mathgrrl

To finish our collection of trefoil conformations, we have a stick knot and a cubic lattice knot: STL file for stick: http://www.geekhaus.com/makerhome/day153_trefoil_stick_40_25.stl STL file for lattice: http://www.geekhaus.com/makerhome/day153_trefoil_lattice_40_25.stl Thingiverse link: http://www.thingiverse.com/thing:234107 Technical…
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Day 152 – Petal and tight trefoil knots
Day 152 – Petal and tight trefoil knots 640 480 mathgrrl

Two more trefoil conformations – as a petal knot (all crossings line up along one center stem) and a tight knot (with the smallest amount of rope length possible given…
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Day 151 – Fourier and tritangentless trefoil knots
Day 151 – Fourier and tritangentless trefoil knots 640 480 mathgrrl

Continuing our collection of trefoil knots, today we printed a trefoil in a Fourier-(1,1,2) knot conformation and a trefoil knot in a tritangentless conformation. In other words, the first trefoil…
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Day 150 – Trefoil torus knots
Day 150 – Trefoil torus knots 640 480 mathgrrl

For the next four days we’ll be posting various mathematically interesting models of the trefoil knot. Mathematicians consider two knotted forms to be equivalent if one can be transformed into the other…
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Day 149 – Balloon dog
Day 149 – Balloon dog 640 480 mathgrrl

Today we rest. And print a balloon dog: Thingiverse link: http://www.thingiverse.com/make:63096 Settings: MakerWare .3mm/low scaled to 57mm across, in 29 minutes with raft and support on a MakerBot Replicator 2. Technical…
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Day 148 – Shrinking and Remeshing the Fidget Cube
Day 148 – Shrinking and Remeshing the Fidget Cube 640 480 mathgrrl

Now that the hinges on the Fidget Cube are smaller (see yesterday’s post), we can make the cube itself smaller. Let’s start by going down from cube length 20mm to…
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Day 147 – Fidget Cube with Smaller Hinges
Day 147 – Fidget Cube with Smaller Hinges 640 480 mathgrrl

After more testing we figured out how small we can make the hinges on the Fidget Cube and still have it print reliably in one piece. (The answer: 1.5mm radius.)…
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Day 146 – Customizable Print-In-Place Fidget Cube
Day 146 – Customizable Print-In-Place Fidget Cube 640 480 mathgrrl

Today we finished our customizable print-in-place fidget cube model. By changing just a few parameters in OpenSCAD code, we can decide whether the fidget cube will have a snub configuration…
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Day 145 – Print-in-Place Fidget Cube
Day 145 – Print-in-Place Fidget Cube 640 480 mathgrrl

On Day 142 we printed a copy of emmett’s Folding Cube model from Thingiverse. That model works wonderfully but assembly was a little difficult both because it was physically hard to…
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Day 144 – Volumes of Hanoi
Day 144 – Volumes of Hanoi 640 480 mathgrrl

The semester has begun and we are back to teaching calculus. Later this semester we will cover Volumes of Solids of Revolution with the “disc method” and the “shell method”,…

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