Turn your Dremel into a blower or vacuum. It works really well!

.75" ID output port, 2.15" inlet. Inlet bolt circle is 2.438" in diameter, and is for 6 4-40 bolts.

Printed on a Fablicator!
fablicator.com

EDIT: The Impeller I believe is backwards. It still works very well, though. I'm going to re-print a mirrored version to see if it makes any difference.

EDIT2: The impeller works about the same despite being right or left handed. go figure.

In two recent posts, thing:16508 and thing:16968, I provided polyhedron openSCAD commands based on the polyhedra libary at netlib.

netlib.sandia.gov/polyhedra/

The Catalan bodies were the only convex polyhedra that remained undone in the library and I have now converted them to openSCAD polyhedron commands.

There was one Catalan polyhedron missing from the library, the triakis tetrahedron. To make an openSCAD polyhedron command one needs a set of vertex coordinates and information about how to connect the vertices to make triangles. By typing "triakis tetrahedron coordinates" in Wolfram/Alpha -

wolframalpha.com/

I obtained a set of vertex coordinates. A table of distances showed where the triangles should be placed.

All of the Catalan stl files are included in hollow_catalan_stl.zip and the scad files that produced them are in hollow_catalan_scad.zip. A module containing the polyhedon command that produces the polyhedra is at the end of each scad file and can be extracted and used in other openSCAD programs. I have printed all of the stl files, some multiple times.

Stl files of Catalan solids that print particularly well are included below. Two with 12 faces are the triakis tetrahedron and the rhombic dodecahedron. One with 24 faces that prints well is the trapezoidal icositetrahedron. An interesting one with 24 faces is the pentagonal icositetrahedron. It occurs as enantiomorphs; that is mirror images which do not superimpose. The picture at the left shows the two forms and the stl files used to print them are included below.

The Catalan solids are named for a Belgium mathematician, Eugène Catalan, who first wrote about them in the mid 19th century. They are derived from the Archimedian solids. Much information about them is available on the internet; "Catalan solids" entered in Google usually results in more than one million hits.

Resized to fit on a Replicator with each part seperated from the original multi-part stl.

With a few tweaks, I bet this could be printed all in one using water soluble support...

a printable cresentwrench

This is a half-size version of Stefan's double-size minifig, with added attachment posts – you may have to shave the posts to get them to fit.

Model of Mt. Everest generated from Shuttle Radar Topography Mission (SRTM) 90m topographic data. This fulfills a long overdue promise (see thingiverse.com/thing:8763) to publish a recipe for making your own topographic models from raw data.

I have made slight variation on thingiverse.com/thing:5699

Now it is possible to make wider range of bricks, plates and tiles.

This is a sculpture from my recent solo show, "Tomorrow Land"! You can read all about the meaning of the work here: rhgallery.com/site/exhibitions/tomorrowland/tomorrowland_pressrelease.pdf

What's important is this sculpture features the silhouette of William Shatner cut out of a landscape.

It's art so it's not "for" anything other than to impress your friends with your well-developed cultural palette.

Back in 1980 my grandparents bought me a toy - "Little Van Goes" by Tomy. This was a bunch of plastic plates that had raised images of van parts. You could combine three plates in a holder, put a piece of paper on it, and rub with a crayon to make the most awesome 70's vans you could imagine. There were others of this type of toy, but pretty much entirely fashion oriented: Fashion Plates, Barbie Fashion Plates, etc.

Thirty-two years later I decided to make my own version of those types of toys, but this time as there is a community of makers, together we can overcome the problem with the originals: lack of variation in plates!

Now we can design as many plates as we want: sleepy robot eyes, rabbit mouth, pig nose, googly eyes, parts made from kids' drawings, ornamental parts, ABCs, and so on!

Have fun!

Read more of my thought process and story here: myplasticfuture.com/cottage-frottage-or-making-creative-fun-at-ho

Johnson polyhedra have faces composed of regular polygons: triangles, squares, pentagons,hexagons, octagons and decagons. There are only 92 such polyhedra. Instructions for making paper models are available, but with stl files one could print more durable examples.

I recently came across the netlib library of polyhedra at

netlib.sandia.gov/polyhedra/

which includes the Johnson polyhedra. I was pleased to see that it would be easy to convert the files to openSCAD polyhedron comands. Polyhedron commands are
a compact way of describing a polyhedron and, when executed, output an stl file.

I wrote a fortran program to convert the files; however a few files had errors. I had corrected most errors with openSCAD's unusual, but marvelous, "thrown together" mode when I was informed that the errors had already been noticed and corrected by George Hart

georgehart.com/virtual-polyhedra/netlib-info.html

There is a link on the George Hart page to a set of VRML files which display the Johnson polyhedra with color coded faces. References are also given.

Using the corrected files I was able to finish the conversion. You will find the 92 scad files in Johnson_Scad_Files.zip and the 92 stl files in Johnson_Stl_Files.zip.

To get a large version of the polyhedra it is best to print a hollow structure. Five examples of hollow polyhedra stl files are included here together with a sample openSCAD file, hollow_j03.scad.

Notice: This is a project in development, and I intend to improve it over time. This draft will work, but it's hardly ideal. Caveat Emptor!

Update Jan 31st: I've uploaded Version 2, which is pretty much the same as 1.5 (which I've removed as a result) but comes with the "Hex Key Holder", which can be fitted with a standard screwdriver bit from a powertool to act as a crude "center". My experiments with using two such centers to drive the lathe weren't great, as one invariably ends up spinning and the piece stops. So it looks like the required parts at present are: Two Bearing-End-Body Sections, two Bearing-And-Tool-Fittings, A Boltplate and a Hex tool holder. You'll also want a Dremel Rest and a length of MDF/wood to bolt it all down to. And you'll need googles, and perhaps gloves, and a lot of sense.
For now, it is left to the user to figure out spacing of the body sections and how to align them. I'm working on improving that. :)

More Update: Really bad video of me demoing Microlathe: youtube.com/watch?v=6XXN6UkrnIw and a shot of the finished piece of dowel on my Twitpic: twitpic.com/y8jnl
Also, Microlathe was featured on Makezine! blog.makezine.com/archive/2010/01/tiny_printable_dremel-powered_lathe.html

Microlathe is a little dremel-powered woodturning/watchmaker's lathe that can be printed and bolted together with all those leftover M3 nuts and bolts that came with your Makerbot. In addition to the M3 nuts/bolts, you only require a 608 bearing (I got an extra one with my Makerbot) and an 8mm diameter spring to fit the bearing-end. You probably don't even need that spring.

So, if you have a Dremel handy, you can consider this "The Lathe That Came Free With The Makerbot"!

Microlathe is Parametric, and makes use of a "Global Parameters" script from which the others derive shared traits such as the radius of the bolt plates, etc.. you could try printing a larger one, but bear in mind the limited space you have to print the body portions, which are already quite large for a Makerbot.

MicroLathe makes use of shapes.scad, which was kindly released to the community under the GNU General Public License by Catarina Mota. Permission was explicitly granted for shapes.scad to be considered released under an Attribution, Sharealike license additionally in this case, to facilitate licensing crossover. Thanks a million Catarina!
Microlathe also makes use of teardrop.scad, which was provided kindly by Erik De Bruijn. Teardrop.scad is released under the GPL2 license, with the inheritance clause generously waivered in this case to permit release under a non-GNU license. I'm very grateful Erik, thanks!

I'd appreciate a small donation via Paypal if you find yourself using this to generate a profit (selling turned items, etc.), or if you just love it and want to show your appreciation. Otherwise, it's all yours to print for yourself or others! Just don't charge for it without asking me and informing the buyer that it's available freely here.

This is a single head taken from Rebel's Easter Island Moai Statues goo.gl/namKU found on Google's 3D Warehouse as a simple test for exporting STLs from Sketchup and processing models in Netfabb Cloud. The object has been printed on a Cupcake with Sanguinololu running Sprinter/Printrun/SFACT.

A cleaned-up Stanford Bunny, with the holes in the model sealed.

Sometime probably in the 1400's it probably took some poor dudes a lifetime to learn how to mine the marble, transport it to Venice, and painstakingly chisel out this Lion statue.

Fast forward to 2011 and some guy with an iPhone can visit Venice on vacation, take a few pictures, upload it to the internet and within minutes it can be recreated in plastic miniature on my desktop on the other side of the planet!

I cleaned up this awesome scan, resized it, and made it into a solid. You'll need to turn on support!

Update: I uploaded a new version that properly sets his feet on the platform. If you tried printing it and it started too high, re-download the new stl.

OK, I didn't do much of the work for this one! I was browsing various other 3D download sites, thinking how bad most of the free models are for 3D printing and found this :
archibase.net/download/27844.html
I thought it could be printable.
So, downloaded it & imported the .3ds file into Google Sketchup.
Realised that it wasn't perfect, so added a base and a support for the chin. I also decided to add a void in the middle to hopefully use a bit less plastic but still have something to "fill" for strength.
The void has a flat top. My printer did a reasonable job of printing the flat with no support. First layer a bit sketchy, second was fine.
I'm guessing there would be better ways to do the chin support as well but this was a quick job!

My first thing! It's a mount to attach an iPhone 4 to your MakerBot so you can shoot timelapses or stream video to remotely monitor builds.

* iPhone 4 or 4S compatible.
* Thing-O-Matic compatible (and probably Replicator and others)
* Snug enough to mount horizontally
* Slot for an iPhone cable

Make sure it doesn't obstruct the build platform!

Not sure how to announce this other than by uploading a 'thing'. So here is one.

Enthousiastic about OpenSCAD but somewhat frustrated by the limitations of its language, I've worked on an alternative using Javascript. It's free, completely open source, still seriously under construction, based on Evan Wallace's CSG.js library and can be used from within the Chrome browser.

Launch your Chrome browser and go to: joostn.github.com/OpenJsCad/

The benefits over openSCAD are mainly in the language itself: you can use dynamic arrays for example, and solids can be stored in variables.

UPDATE: I've added a parser for local files as well. Create your own .jscad files, go to
joostn.github.com/OpenJsCad/processfile.html to parse them into an STL file.

UPDATE 2: Here's my first real thing designed with OpenJsCad:
thingiverse.com/thing:16329

Created from a Decorative Garden Mushroom using an Artec 3D Scanner. The model has been checked for holes and given a flat base for printing. This STL was pulled from their gallery of models located at artec3d.com/gallery/3d-models/

This is a terrific print and looks great in Glow-in-the Dark ABS.

The Penrose tiles by pleppik got me thinking and I decided they would be cooler if they held together on their own. The snap shapes enforce the matching rules (as long as all the pieces are right-side up), which means any pattern you make out of them will be aperiodic.

Have you been envious of ever-dimensionally-increasing build platforms? Well now you can claim to be able to print ONE FOOT* OF PLASTIC!

* Warning: Claim may be pun.

But seriously though, this was a test print while I continually try to get my printer to meet my unrealistically high quality expectations.

Hope you get a kick out of this!

UPDATE:
I added an approximately "full-size" model of just the top half of the foot.

I'm satisfied with the quality.

Dental Model
Dental Antagonist
Dental Teeth 16, 21,23

This is a 3D print derived from medical imaging of an aortic bifurcation and iliac arteries. The source data set is publicly available in the OsiriX DICOM library pubimage.hcuge.ch:8080/ . It is a CT scan from a patient that appears to have had one or more iliac stents placed in their right iliac artery. The workflow used to create this Thing was (almost) completely open source:

AMNESIX Data set: pubimage.hcuge.ch:8080/DATA/AMNESIX.zip

OsiriX used for segmentation and rough STL export: osirix-viewer.com/

Meshlab used for cleanup: meshlab.org/

Final cleanup, slicing, and GCode using Netfabb (http://netfabb.com), which is a bit faster than the open source alternatives.

Printed with RepG on an Ultimaker. Using the Netfabb "standard" profile (modified to print at 230 degrees) the full print took 4 hours and 19 minutes.

More on the story of this model: craig.bonsignore.com/2012/01/17/open-source-human-anatomy/

I wrote processing sketches to generate labyrinths ( local-guru.net/blog/2011/04/23/generating-labyrinths-in-processing )

or hexagonal labyrinths ( local-guru.net/blog/2011/04/26/hexagonal-labyrinths-in-processing ) some days ago.

Then I modified my sketch a bit to generate a 3D version of the labyrinth and export it as a stl-File ( local-guru.net/blog/2011/04/29/printed-hexagonal-labyrinth )

Singly connected. Every pair of points can be used as start and goal.

Just a simple wall hook with a bunch of variables to play with that changes sizes of the hook features.

I included 3 different sizes as examples.

It took a long time and a bit of research but in the end I finally did it. What is it? Why, it's a printable LEGO ice mold! Fill it with water, toss it in the freezer, and about half an hour later, you've got some sweet LEGO ice cubes!

Specs: 96.0mm x 99.0mm x 13.0mm, well within the Makerbot's capabilities
Yields 10 blocks per batch.

I don't know if this should be considered a derivative of thingiverse.com/thing:591 or not. It was inspired by it but I started from scratch because I wanted to do it in openscad.
You can adjust the size and tweak the dimensions of the various parts of the lego in the openscad file.
There are probably bugs, it's a work in progress.
A real lego snaps into the bottom pretty well, not as well on top.

This is a scan of our Hack Space Area at Raumfahrtagentur. It was done with a M$ Kinect and the wonderfull KinFu Software provided by PCL pointclouds.org/news/kinectfusion-open-source.html

This is a little bitty nuke. For entertainment purposes only!

This model is visually modeled after a photograph of Little Boy, the nuclear weapon dropped on Hiroshima. I've created it with a hollow shell to save material and to give options for further derivatives. (Flower seeds? Pneumatic or vinegar/baking soda rocket?)