3D Printing

3D Printed Spacer for Using Sharpies in the Silhouette

3D Printed Spacer for Using Sharpies in the Silhouette 964 640 mathgrrl

In this post we’ll use 3D printing to solve the micro-problem of keeping an ultra-fine point Sharpie marker aligned in a Silhouette craft cutter…

Pairs of Packable Scutoids

Pairs of Packable Scutoids 628 472 mathgrrl

There’s a new shape in town! In a new article “Scutoids are a geometrical solution to three-dimensional packing of epithelia” in the journal Nature, a group of scientists just introduced a new shape that they have dubbed a “Scutoid”. To make a 3D model of this new shape, we created a simple polyloft module in OpenSCAD that lofts from one polygon to another… // Hacktastic

Saddle Surface with Mathematica and Tinkercad

Saddle Surface with Mathematica and Tinkercad 540 406 mathgrrl

A saddle surface is one of the few things I think is really worth 3D printing for Calculus students. There’s something important able to feel the two competing curvatures with your actual hands, instead of just looking at a picture. Since I always like to use the simplest design tools possible, this is a model that I export from Mathematica and then process in the much easier to use design software Tinkercad… // Hacktastic

3D Printing in South Africa

3D Printing in South Africa 628 472 mathgrrl

This month I had the opportunity to speak about mathematics and 3D printing in Johannesburg, Pretoria, Cape Town, and Kimberley as part of the U.S. Embassy Speaker’s Program. For this visit I made a special 3D-printed keychain to give away at events, which highlights the nine provinces of South Africa. By running a loop through the landlocked country of Lesotho, you can make a keychain… // Hacktastic 

College-level math exploration in 3D at JMU 3SPACE

College-level math exploration in 3D at JMU 3SPACE 842 640 mathgrrl

This fall’s liberal arts math course at James Madison University used 3D printing and design as the basis for exploring fractals, infinity, and other mathematical curiosities. The students learned Tinkercad, OpenSCAD, and other 3D design tools to construct mathematical objects from scratch, investigated the mathematics of those objects, and presented their work in blog posts and showcases… // Ultimaker Education

Rainbow Triple Wrap Bracelet

Rainbow Triple Wrap Bracelet 640 480 mathgrrl

Today we put our XYZ da Vinci Color printer to the test! For the last six months I’ve worn a 3D-printed Triple Wrap Bracelet all day and all night, and it’s great. Mine was printed on a super-fancy HP Jet Fusion printer at Shapeways, and a slightly thicker model would be a pretty nasty torture test for any desktop 3D printer. Plus, we’re going to use Meshmixer add some color… // Hacktastic

Hex Bowls for Settlers of Catan

Hex Bowls for Settlers of Catan 640 480 mathgrrl

Settlers of Catan + Cities and Knights + Expansion Pack + House Rules = Complicated. To help mitigate the chaos we keep our settlements, cities, roads, and knights in tidy 3D printed hex-boxes. The boxes have snap-fit lids with a slot to help with opening. We 3D printed boxes to hold our standard Catan pieces, extra Catan pieces, 3D Catan numbers, and some extra bits and pieces for our House Rules… // Hacktastic

Getting Started on the Brother KH-881 Punchcard Knitting Machine

Getting Started on the Brother KH-881 Punchcard Knitting Machine 640 440 mathgrrl

Just before the new year we bought a punchcard knitting machine from the 1980’s from eBay. It’s a Brother KH-881, one of the last Brother models before electronics were added to the machine. Step 1 of our plan: Figure out how to use a punchcard knitting machine! This is the first in a series of posts to catalog this journey and maybe make it slightly easier for anyone else that wants to walk the same road… // Hacktastic

Dissolvable Support Interface is Everything You Need

Dissolvable Support Interface is Everything You Need 640 480 mathgrrl

I’m totally in love with dissolvable supports for complex models, but… the dissolvable PVA material is (a) expensive, (b) increases my print times, and (c) takes a long time to dissolve. In this post we’ll discuss a tip about how to make all three of those things better! In a nutshell, we’ll be setting Cura so that only the interface between the model and the supports uses the dissolvable PLA… // Hacktastic

Creating Celtic Knots with Fusion 360

Creating Celtic Knots with Fusion 360 640 480 mathgrrl

Today we’ll do a step-by-step walkthrough tutorial on designing 3D Celtic knots from scratch with Fusion 360. Our technique will be to make a grid of dots, then connect the dots with splines, then shift those splines up or down at the crossing points. This gives us a thin curve that traces out the desired knot, and we’ll be able to sweep a circle around that curve to make a round 3D tube… // Shapeways Magazine