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Day 355 – Saturday guest: Fred Hohman and knot fibrations, part 1

Day 355 – Saturday guest: Fred Hohman and knot fibrations, part 1 150 150 mathgrrl

One thing about living in New York City is that you get a lot of guests. Lots of people come to the city and hotels are too expensive even to…

Day 354 – Forty-one Pentagonal Icositetrahedra

Day 354 – Forty-one Pentagonal Icositetrahedra 150 150 mathgrrl

Today (August 15) I had the great pleasure and honor of attending the final convocation for the 2014 NYU GSTEM program. At this event, 41 young women who are rising…

Day 353 – Customizable hinge/snap Tetrahedron net

Day 353 – Customizable hinge/snap Tetrahedron net 150 150 mathgrrl

Today we modified Day 344‘s Cube net design to make a Tetrahedron net: Here it is mostly folded up. This net is so small that it only folds well in one…

Day 352 – Center of mass demonstration

Day 352 – Center of mass demonstration 150 150 mathgrrl

Today we printed designbynumbers’ Center of mass manipulatives for calculus classes from Thingiverse. It worked very well and balanced wonderfully! Thingiverse link: http://www.thingiverse.com/make:90962 Settings: Printed on a MakerBot Replicator 2 with .2mm…

Day 351 – Impossible Menger Burr

Day 351 – Impossible Menger Burr 150 150 mathgrrl

After richgain‘s excellent guest posts walking us through Burr Tools on Day 348 and Day 349, we couldn’t resist giving it a try. As I think we’ve established, I love Menger sponges…

Day 350 – Triple Bubbles

Day 350 – Triple Bubbles 150 150 mathgrrl

When three bubbles intersect, they do so in a very specific way. Here’s what it looks like: Using the OpenSCAD code for this design included at the bottom of this…

Day 349 – Sunday guest: Rich Gain and Printable Puzzles, part 2

Day 349 – Sunday guest: Rich Gain and Printable Puzzles, part 2 150 150 mathgrrl

This is the second in a pair of guest posts by Richard Gain (richgain on Thingiverse), designer and printer of 3D burr puzzles. For richgain’s first post see Day 348.…

Day 348 – Saturday guest: Rich Gain and Printable Puzzles, part 1

Day 348 – Saturday guest: Rich Gain and Printable Puzzles, part 1 150 150 mathgrrl

Today’s post is contributed by Richard Gain (richgain on Thingiverse), designer of the nicely-constructed puzzles from Day 324 and Day 332 as well as the beautiful and terrible Szilassi polyhedron from Day…

Day 347 – Friday Fail: Self-Intersecting Faces Edition

Day 347 – Friday Fail: Self-Intersecting Faces Edition 150 150 mathgrrl

It seems that the MakerBot Desktop software has an upper bound on the number of “self-intersecting faces” that can be in a model. When I had just a couple of…

Day 346 – Personalizable Crazy Cube

Day 346 – Personalizable Crazy Cube 150 150 mathgrrl

One really cool thing about a fold-out cube is that you can print things on the faces without using supports and then fold up the cube to get an object…

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