This is George Hart's reconstruction of a 16th-c. wooden puzzle, currently in the Schloss Ambras Museum. Print out 76 units and reconstruct the original! A full description is available at georgehart.com/rp/torzle/torzle.html.

George Hart has a bunch of amazing rapid prototyping geometric structures at georgehart.com/rp/rp.html

These are the parts to make Face-centered Cubic Voroni Tetrahedron of various sizes.

The pieces here have been scaled 7x and oriented to print nicely on a makerbot/reprap. For the originals, and other pieces to allow making octahedrons, see George's original page at georgehart.com/rp/FCC.html

Concept by Colin J. Roberts and Paul J. Roberts. Please see their website for more information and history: pjroberts.com/sphericon/index.php

Some have two positions. In the picture see the amusing paths that these objects (the ones without "Stop" in the filename) will roll along.

3D Modeled by Chris K. Palmer

Printed by Jeff Rutzky. See his model in action here: vimeo.com/16985828

I uploaded these with Paul's permission to commemorate the arrival of my Cupcake CNC!

I've taken all the calibration prints out there and condensed them into one place. I have here:

.5mm thin wall
20mm box
20mm hollow box
50mm tower
perimeter width/t tester
precision block
overhang test
oozebane test
bridge test

and more to come.

All designs are my original work and not taken from other users. But they are inspired by other users.

The 20mm box, thin wall, and 50mm tower are ideas from Spacexula's great calibration set thingiverse.com/thing:2064, and the other ones are my ideas and not influenced by others. After Spacexula's calibration set, there is quite a derivative tree.

Here are some combos I have found with my MK5 extruder:
(In order of: Layer Height, Width/Thickness, Feedrate, Flowrate PWM)
.36, 1.528, 34.1, 255
.3, 1.789, 42, 255
.2, 2.521, 35, 197 *This is still experimental, most prints I try with it fail :(

A collapsible traffic cone.

The sections should be captive (there are some strips on the bottom to hold them in)

It's configurable in the openscad file for the size of the cone, number of sections, wall thickness etc.
There is a variable that you can set to TRUE to render the cone extended so you can see how it looks.

I have printed a small one so far but my TOM is taken apart a bit right now so I haven't printed a large one.

Will this count for the tallest object record if I ever get around to printing a full size one?

The Yoshimoto Cube is a polyhedral mechanical puzzle toy invented in 1971 by Japanese Naoki Yoshimoto (吉本直貴, Yoshimoto Naoki). The cube is made up of eight interconnected cubes and it is capable of folding and unfolding itself in a cyclic fashion. You can keep folding, or unfolding the cube, indefinitely. Once folded, the cube can be turned into two rhombic stellated dodecahedrons. Yoshimoto discovered that these two shapes could pieced together into a square when he was finding different ways he could split a cube equally in half.

--------------------------------UPDATE------------------------------------
6/13/2010

Yoshimoto Cube has just been blogged about on Makezine

blog.makezine.com/archive/2010/06/3d-printable_yoshimoto_cube.html

6/13/2010

As suggested by Michael Ragan,

"Now the n+1 step would be to design a printable mold for this component, so you could print the mold and cast, what is it--16 of these units that you need to make the cube? Then find the right kinda tape to make the hinges. "

I have added a two different molds. A open part mold or a 4 part mold. More information below.

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Saw this Puzzle on Makezine yesterday and wanted one.
blog.makezine.com/archive/2010/06/the_yoshimoto_cube.html

The bad news is the Yoshimoto Cube cost $65.00!!! Ouch
momastore.org/museum/moma/ProductDisplay?catalogId=10451&storeId=10001&parent_category_rn=11480&categoryId=21658&partNumber=67866&LangId=-1&promoCode=8K119&cid=GPS07230901

After two hour of modeling in SolidWorks I was to model the whole assembly!

More information and how to tape up the model can be found here.
instructables.com/id/Crazy-Star-Cube-!/

Later I will add an Active hinge for easy assembly. But till then enjoy!

I am building my Mendel right now, So I will not be able to print this model for a month or so. But would really like to see it working! In SolidWorks this model works great! If you are thinking of building one tell me and Ill add your pictures & Videos if you make then!

A few years ago I was interested in Penultimate Modular Origami by James S. Plank cs.utk.edu/~plank/plank/origami/penultimate/intro.html folding paper into geometrical spheres.
Now there's a rapman in my stable and paper turned into polylactic acid. This is my first printed object, I hope you"ll enjoy it! Can be pressed, stretched, thrown, twisted, and the bow-connectors could be basic elements for connecting rubbers into anything!
In TwistinTheCube.skp I tried to reveal how you get a Qball by twisting a cube, before it becomes a cuboctahedron.

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.

A while back, a friend of mine asked if I could make her a version of a Fox 40 whistle.

Originally, I tried to make one in Google Sketchup but the result was unprintable. Then I made a close replica in OpenSCAD, but that didn't print well and didn't make any sounds.

So, I decided to go after a design that accomplished the same thing (2-tones & pealess) but had a more printable form. It took me 8 iterations, but I finally got it :)

A simple sphere made from three interlocked rings I made one day to show the whole process to a friend.

The dimensions of the rings in the provided stl files are 60mm outer diameter, 20mm height and 3mm thickness. They have been generated with one face at every 2mm of the perimeter and also, a gap of 0.4mm in the slots which gave a nice fit for the rings printed by bot1334.

The zip file contains two more examples (40mm diameter, 5mm and 10mm height and, if I'm not wrong, 2mm thickness) however, I was not using any "gap" parameter for those so... they'll need some cleaning to fit properly.

Some more pics: flickr.com/photos/aubenc/sets/72157627518857918/

UPDATE:
Replaced the OpenSCAD file with v2 version which includes a production plate for the 3 rings in one build.
(I find the multiple colors a much nicer option though...)

Also added:
- A set for three rings that should fit in a Cupcake, their diameter is 48mm, height 16mm (thickness and gap same as above) and they are distanced 2mm.
- Another set for larger build envelopes with huge dimensions (180x60x4dot5.zip)

I have NOT printed those, hope they work fine, good luck if you try them!

BTW, feedback (and picture too) for the big set is highly welcome !!! specially if it doesn't work so no one else will waste time, plastic, energy... trying it out !!!

A derivative of MakeALot and chylld's previous work.
I wanted a more tweakable model, and decided to switch to a different coordinate system as my brain doesn't bend around toroids as easily as MakeALot's!
It's classed as a toy because I spend more time finding cool settings than I do compiling and printing variants (which is quite a claim if you increase the number of spheres and decrease the $fa parameter too far!)
Enjoy!

2011-06-21 Update
I've also implemented the algorithm in Art of Illusion, as it allows much higher resolution STLs to be generated for much lower computational cost.

I decided to revive the venerable iris box by redesigning it in OpenSCAD and making it printable with fewer parts and less assembly. It's also somewhat larger (though now the dimensions are easily adjustable with OpenSCAD), the tracks are redesigned to give more rigidity when closed, and it now opens and closes according to righty-tighty, lefty-loosey. The ring is also aesthetically redesigned and the base interior tapers down the wall thickness to give a little more internal volume.

This is a derivative of thingiverse.com/thing:4458. When I built the shorty version I had trouble getting the parts to print correctly and I wanted the ring to turn further to fully open the box.

When I designed this iris box I started from scratch and used a different mechanism to open the box.

I have also uploaded the NX6 .prt files for anybody who wishes to use them.

This is a 3D tic tac toe board and pieces.

Do you find yourself building Castles out of your chips during a game of Texas hold'um? Here is a great spin on that classic fun!

What to build during your next game? Blow your friends away with these fun design ideas

1) Tower
2) Castle
3) Bridge
4) Stair Case
5) Card holder
6) Wall
7) Gun
8) House
9) Dragon
10) Boat
11) And many more fun shapes. Please post pictures of your parts!

Lockable Poker Chip Size:
Diameter: 39mm (Standard size found online)
Thickness: 3mm (Common size referenced online, this correct?)
8 Slots Measuring: 3.25mm X 6mm with a 1mm rolled edge

This is some further refinement from thingiverse.com/thing:4126 both with and without the mandible from thingiverse.com/thing:3580, both whole and sliced in half.

In my previous attempt, I deleted all of the inside to create a solid object with all the porous and hollow parts filled in, and all external holes closed.

This time, I did the reverse, deleting all of the outside and the smaller internal features, to create simple internal volume (mostly the brain cavity). Then I subtracted the cavity from the solid object, did a small amount of further refinement, and then split it. I reduced the resolution of the mandible from thingiverse.com/thing:3580 to match the resolution of the skull then smoothed, scaled and rotated it to fit as closely as possible. I then cut off and cleaned the remains of the skull's original mandible and subtracted this mandible from the results.

This should give a partially hollow model that still has all the small internal details that can't be seen removed. I have uploaded (and included in the blender file) both the original cleaned skull and the one with the replacement mandible fit in. I also sliced both skulls, but only included the bottom for the second one, since the top didn't change.

I hope that the results will take less time to print than the previous two models.

Work on this model was done with Meshlab and blender.

I teach Linear Algebra to a small class of High School students. We took a few days to learn openSCAD and use the multmatrix function to explore some "real world applications".

The kids in the class had no prior programming experience and I think openSCAD was a great way for them to learn some of the basics of programming.

Their homework assignment was to design two objects, a building and a tree, by writing their own transformation modules using the multmatrix function (i.e. no using the built in rotate, translate, etc. functions, although union, difference, intersection were ok). Here are their buildings.

My grandson and I were up early this morning and he wanted to make a storage box for some of his things. A Thingiverse search didn't turn up anything that interested him, but then he noticed the burn hazard warning sticker on the TOM and decided on a pyramid shaped box. The OpenSCAD script just took a couple of minutes and after a quick look through the filament bin for color ideas it was time to hit the print button.

A python script to generate OpenSCAD models to generate two parts of a box that screw together and snap fit if you find your way through the maze :)

Turn your pencils into a couple of stacked cooling towers, very cool(ing)
I got the idea from a suggestion by relet thingiverse.com/relet

Thank you, all of you who've made cube gears and posted pictures. Since tbuser made these lovely pin connectors, thingiverse.com/thing:10288, I figured it was high time to make a fully printable cube gear set. Now you needn't bother buying any more screws: this one snaps together.

UPDATE: For anyone without access to a 3D printer, you can now buy these from caesia on her Etsy store: etsy.com/shop/PlasticFusion

UPDATE: New version uses tbuser's new pin connectors V2: thingiverse.com/thing:10541, is much stronger, and prints right-side-up. This is practice for making a heart-gear version.

This design also incorporates a couple of tricks that others may find useful. The center block has two very narrow slices through it, which cause interior walls to form, which help keep the tops of the holes from sagging during printing. Likewise, a cylinder is cut out of the interior of the gears, which serves two purposes. First, it makes a strong internal support for the pin. Second, it makes for less stringing between parts when you print four gears at once, because Skeinforge makes the head go from the center of one to the center of the other, so that the perimeters wipe off the nozzle.

UPDATE: By popular demand, a new version of the center block has been uploaded (BcenterFlat.stl), which doesn't have any internal slits and is oriented to print on a large face. This one is significantly easier to print, though the top and bottom holes do end up a touch tighter than the rest.

At last, here is the much-requested 100% printable heart gears. No more ugly bolt holes! This was designed along the same lines as the screwless cube gears: thingiverse.com/thing:10483, and in fact uses the exact same center block (though the pins are slightly shorter).

UPDATE: If you lack a 3D printer, you can now buy these from CarryTheWhat at etsy.com/shop/CarryTheWhat.

The size has been increased a bit from the previous version to accommodate the printed pins, so it now measures 100mm across when assembled. Since everything is now printable, it should be easy to scale this design up or down as you see fit. At this size it took me ~6 hours of printing time on my TOM.

This is a puzzle box I built to infuriate my friends. There is a secret to opening the box that is very, very hard to guess. People will spend hours trying to open it. It is a perfect 1.25 inch cube with only a single seam around the middle.

There are two elements. The first is the actual locking mechanism. The second is a pure distraction to keep them from finding the first mechanism.

The box is locked by a ball bearing being held in place by a magnet preventing the box's lid from rotating. You can't discover or manipulate this magnet unless you apply a very large acceleration to the correct face. If you hit it on the table you break the magnet's hold on the bearing and the bearing moves to an empty space allowing the box to rotate open.

There is also a set of three smaller bearings that roll around in a set of three tracks. They do nothing but you can hear them and you can move them. This is a red hearing. People will fixate on manipulating the bearings inside the cavities that they will never try smacking the box. Hilarity ensues as they get more and more frustrated that nothing works and they hypothesize more and more complicated internals as reasons for their failure.


WARNING MAY RUIN FRIENDSHIPS

How to open box
1. Orient the box with the slightly heaver side upwards
2. Strike the box flat onto the table with moderate to high pressure
3. You should hear a click
4. Rotate the lid clockwise

---
I bought my magnets from amazon
amazon.com/Magcraft-NSN0732-16-Inch-Magnets-40-Count/sim/B000E683XQ/2
But they don't seem to be available anymore. Here is a replacement but feel free to use a different magnet. Edit the parts files as needed.
amazon.com/Applied-Magnets-100-Neodymium-Discs/dp/B001LQQP9W

files for the toadinator

developed at educationhackday.org in baltimore

toadinator.schmarty.net

Thanks to Marty McGuire, Any Hurst, and John Cutonilli for working on the project, and thanks to Mike Brenner for organizing the event.

A sphere thing took from the google warehouse while I was looking for an openwork style sphere.

It's one of the amazing pieces of TaffGoch : bit.ly/uku6QH

Approx. 50x50x50mm

As the name implies, this spindle has collapsible hooks to facilitate quick change of filament spools.

Here's everything you need to convert a standard 7" hamster ball into a radio controlled (or potentially autonomous) ball of fury. I've also included plans for a simple stand for the thing so it doesn't roll away when not in use.

Video of the mechanics in operation:
youtu.be/-h-q-IdnQ3M

Videos of people driving them:
youtu.be/nPqL2h55Tgc
youtu.be/6X15eBpUSGU

This is a derivation of the concept i used for the "BIC powered ballpen" , but with different style.

Its pattern like fishnet stockings and its smooth curves inspired me its name.

improvements are: less material needed, and you can see the cartridge through it.

See it in action!!!
(select 720p hd and fullscreen!!)

youtube.com/watch?v=1Oq3vD4pQIQ

And tell me if you successfully print it, i do not have a 3dprinter, thanks...

This is an exactly proportional copy of the companion cube from portal, as traced from a screenshot.

There were a few cubes already on thingiverse which I've printed out dozens of, but they all had some issues with printability or proportionality. I think I've solved all the problems with this version.

This version is flat bottomed, and has no significant overhangs over 45 degrees.

It is carefully designed in Solidworks so any changes can be quickly and easily made. I also included step files since Solidworks is pretty unfriendly to a lot of other programs.

The default size is exactly 1in^3

The Cube in the thumbnail was printed by a Fablicator.
Fablicator.com

This is the box version of the awesomely printable Companion Cube by Landru. You can put stuff in it. I tried to keep the box as easily printable as the original was.

I included the OpenSCAD script to generate it, it has few parameters that can be tweaked.

New in this version:
- slightly modified the lid and got rid of the very thin parts at the top of the box. If you want old variant, then there is a parameter for that in the openscad.
- all wall/lid/bottom thicknesses are separate parameters, easy to modify to the taste
- increased the default tolerance slightly, so the lid would fit more likely without much sanding
(haven't printed yet this version, but will shortly)