Mathematics

Day 155 – Menger slice

Day 155 – Menger slice 640 480 mathgrrl

Today we printed owens’ Diagonal Cut Menger Sponge design from Thingiverse. If you sliced a Level 2 Menger sponge in half along a diagonal plane as shown in the picture,…

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…

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…

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…

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…

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”,…

Day 143 – Shapeways delivers!

Day 143 – Shapeways delivers! 640 480 mathgrrl

Does it count as a print-a-day print if something I designed and sent to Shapeways was delivered today?  I think it does, at least the first time it happens! Our…

Day 140 – Three Pi

Day 140 – Three Pi 640 480 mathgrrl

My son loves pi. The number. He and a friend at school have actual arguments about who has memorized and/or written down the most digits of pi. The other day…

Day 139 – Stereographic Spheres

Day 139 – Stereographic Spheres 640 480 mathgrrl

Henry Segerman is well-known for the intricate mathematical modeling that he designs and prints at his Shapeways shop.  So to put our Replicator 2 to the test, today we printed…

Day 137 – Clover knot

Day 137 – Clover knot 640 480 mathgrrl

More TopMod! Today we made a knot: STL file: http://www.geekhaus.com/makerhome/day137_cloverknot.stl Thingiverse link: http://www.thingiverse.com/thing:224032 Settings: MakerWare .15mm/high with raft and supports, in 6 hours and 23 minutes. I didn’t use the custom knot…

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