Just use 2 screws (I used 16mm M3) + 4 washers + 2 nuts to secure your keys.

I'm sorry the pictures are not more descriptive but I have an aversion against posting pictures of my keys on the internet. :)

This thing was made with Tinkercad. Edit it online tinkercad.com/things/7FiWYLp03HY

Update: I made a shorter version of this thing (V2). You can download the STL here / or edit it at Tinkercad: tinkercad.com/things/kVRWqtAy9Dn

I've been developing ways to use 3d powder printing to make air powered robots that have no hard moving parts. Using procedural modeling I can create rapid iterations, incremental designs, and inexpensive prototypes with a simple set of tools. Find more details at - bit.ly/softrobots

You can see video of this design in action here - youtube.com/watch?v=EkPeF-sYQ-0

This is an early prototype of a trefoil tentacle. There are three hollow ribbed volumes inside this tentacle that control its motion. It is controlled through a Processing interface and an Arduino switching a bank of solenoid valves using a simple Darlington transistor. You can grab the code here - forums.adafruit.com/viewtopic.php?f=25&t=36579

This whole project has been made possible by the folks over at viridis3d.com especially Jim Bredt. They've been very generous in letting me use their machines and helping me figure out solutions to the material science challenges involved in this kind of work. They're awesome.

HenrySeg builds incredible 3d objects. I found this creation on youtube and he was kind enough to upload it to thingiverse.

However it was not designed to be printed at home. The files were also not to scale. So I scaled the pieces, broke them down into 3 files: box, box lid, and screw so that it could be printed on a home printer.

This was printed at .3 layer height, 100% fill, at 100m/s with full supports.

box top was printed without supports.

Modified iconic lizard by M. C. Escher in 3 dimensions. The top is drafted at 60° to create artistic striations of the profile when printed with a standard .010 inch per layer FDM printer. The individual pieces interconnect on a 1 inch hexagonal pattern. I find this to be a good example of the accuracy and ressolution of these printers. The parts are line to line and snap together nicely. X and Y coordinates show the limit of resolution and the Z coordinate shows the comparative coarseness of detail in that axis.

A giant evolution of my monarch glider with a full, low profile airfoil. Flies very well, best with a rubber strap launch. About 8 Meters of 3mm ABS to build.

For tips on printing these, drop by my blog at bogon-flux.blogspot.com

They’re basically two hollow spheres, except with one has slots in the side so it can flex to shrink, this makes them easier to fit together with larger allowed tolerances on size.(easier to print)

They’re not actually a hose like for water. There are plainly holes in it.(though if at the right angle wrt gravity, it doesnt seem to come out) I made it with the idea that it’d still move but hold a lightweight camera(/other things) in place.

As usual, [the github](https://github.com/o-jasper/various_physibles) contains development versions.

[Video](http://www.youtube.com/watch?v=74ygvXzmrgk).

This is joint work with Saul Schleimer. After making [Triple gear](http://www.thingiverse.com/thing:66708), we realised that there is a much easier way to design a mechanism with three pairwise meshing gears!

Triple helix is also available at [Shapeways](http://shpws.me/nrXc).

Inspired by the tropical and vibrant coral reefs of Palm Beach, this cuff features complex Voronoi patterns that embody a beautiful coral structure. The coral patters on this design make up a single-layer band and includes an opening to allow minimal stretching for easy wearing. The coral band bevels outward making it look more like a torus ring. This makes an excellent demo print for any home FDM 3D Printer and makes a wonderful gift.

To see it flying click the video button or watch it on [You Tube](http://www.youtube.com/watch?v=r-lhAp11iZY)

First of all: Yes, it flies wonderful, easy to fly with surprising self stabilisation. But a little bit faster than motor glider generally use to fly ;-)
And the best off all: It lands by itself...

I always have a copy of Emmett's brilliant Gear Bearing out on the coffee table - it's such a great talking point and introduction to 3D printing - and recently someone I showed it to suggested it might make an interesting bangle. I'm not sure about its fashion-worthiness, but as a printing challenge I thought it was an excellent idea.
I had already used an idea by Sal to print gear bearings with large circular holes instead of small hexagonal ones (http://www.thingiverse.com/make:26306), so I just took this up to the next level. I have posted the modified .scad file so the design is still fully parametric, and also a copy of the STL file that works with the tolerances on my printer.
Here is the video of the bangle working as a gear bearing (but not as a fashion item!) youtube.com/watch?v=Qt39vLo5l90

See github.com/uplake/BezierScad

Updated 5/10/13--fixed triangle winding in centered BezWall; use polyhedron for variable-height BezArc.

I wanted a bezier library that could handle an arbitrary number of control points. When working on thingiverse.com/thing:77586, I also wanted to rotate extrude a "wall" defined by a bezier path and a width.

BezWall is the workhorse function. The "ctlPts" parameter accepts between 1-8 bezier control points.

The parameters "width" and "height" accept static values (e.g., 5) specifying the width and height of the wall. If height is 0, it will generate a 2d object you can extrude yourself.

The alternate parameters "widthCtls" and "heightCtls" accept an array of values that will be bezier-interpolated along the length of the wall.

If the "centered" parameter is "true", the wall is centered on the path defined by "ctlPts". Otherwise, one edge of the wall is defined by "ctlPts".

At the moment, there is no documentation! But there is a test file that runs through most of the available features.

Turn the crank handle and the marbles are pumped up the vertical shaft to return down the spiral.

Based on the mechanism seen here: sentex.net/~mwandel/marbles/pump.html.

This marble pump could be combined with many of the other marble runs found on thingiverse.

Ever wanted a elliptic paraboloid solid for OpenScad? Here it is!

What is a parabolic reflector good for?
Solar cookers, parabolic microphones, satellite dishes, spotlights reflector
en.wikipedia.org/wiki/Parabolic_reflector

Parabolic reflectors focus parallel rays at a focus point (e.g. sun rays).
And it can make circular rays at the focus point go parallel in one direction (spotlight).

It seems to be "similar" to the nose cone design of aircraft and model rockets, too. en.wikipedia.org/wiki/Nose_cone_design

Usage :
paraboloid (y=50,f=10,rfa=0,fc=0,detail=44);

To create a paraboloid choose following parameters:
- height (y); This defines the vertical height
- focus length (f); This defines the distance of the focus point from the top
- radius of focus area (rfa); You can have a focus circle (rfa>0) instead of a focus point (rfa=0)
- center focus center (fc); Choose the center on top (fc=0) or center in focus point (fc=1)
- fine structure (detail) ; defines the numbers of subdivisions - $fn

Oogoo ( instructables.com/id/How-To-Make-Your-Own-Sugru-Substitute/ and instructables.com/id/7-Things-To-Fix-Or-Do-With-Oogoo/ ) is great stuff! Inexpensive, easy to mold, easy to clean up, quick setting, and makes parts with a nice soft yet firm feel to them. The only thing I don't like is mixing it up. Combining silicone and corn starch, possibly along with some coloring agent, is not easy. Messy, hard to get uniform, and the time taken eats into the working time for the Oogoo. There must be a better way.

Here's my answer. Use an auger to press the stuff thru some plates with holes in them. Minimal mixing is needed to just get the corn starch sort of wetted with silicone. Then inject it into the auger, turn the auger, and out comes uniformly mixed Oogoo, ready to mold. Watch the video here youtube.com/watch?v=IE8L7yjxwAE&feature=youtu.be

This is very much a work in process. The OpenSCAD for the Auger needs to be parameterized and there should be a base plate of some sort to hold things together.

GPX is a post processing utility that converts GCode from 3D slicing software (like Slic3r and KISSlicer) into the x3g files used for standalone 3D printing on Makerbot Cupcake, ThingOMatic, and Replicator 1/2/2X printers. GPX output is compatible with both Makerbot and Sailfish firmware.

###FULL DOCUMENTATION WILL BE UPLOADED SHORTLY

GPX can be configured to perform convenient tasks like pause@zPos scripting, changing filament diameters without re-slicing, ditto printing with different filament diameters and varying the print temperature for wood filament.

GPX is a fast and light weight program written in a structured programming style using ANSI C. GPX is precise and standards compliant in the x3g commands it outputs, and while it performs rigorous syntax and semantic error checking on the GCode input it interprets, GPX is very flexible and forgiving in the actual GCode it will accept.

GPX can be run from the command line, called by shell scripts or run as a post process. It has built-in support for 5D Cupcake, Thing-O-Matic and Replicator 1/2/2X printers. GPX can also load custom machine definitions if required. GPX configuration is very flexible, it can load a default configuration, be directed to load a custom configuration from the command line, or configured using a macro language embedded in the GCode header of the files it converts.

n-Sphere Tiles
Designed as an educational toy for my son, the n-Sphere toy is a little puzzle box with no wrong answers. The sphere can be assembled any combination of 6 tiles oriented in any rotation and will always yield a continuous topology of ridges and grooves along the outer surface.
This version is designed with a flat base surface so no support needed with the makerbot.

Version 2 updated for Medium Resolution prints at:
thingiverse.com/thing:88003

Full spherical shell version available at:
Original (baseball size): [apx. $69]
shapeways.com/shops/na?section=n-Sphere+Full&s=0

Mini (racquetball size): [apx. $39]
shapeways.com/shops/na?section=n-Sphere+Mini&s=0

Micro (golf ball size): ]apx. $21]
shapeways.com/shops/na?section=n-Sphere+Micro&s=0

An attempt at a beveled version of Emmet's planetary gear bearing. The way I generated these probably doesn't work right, so I'll be redoing them.

In theory, beveling the gears should make a better thrust bearing, more vulnerable to tension.

Now with a set of spiral bevel gears. Will see about printing and assembling the new design.

noise dampening feet for Ultimaker and Replicator

It's easy to lose track of a perfectly level print bed. A quarter turn to one leveling nob here ... an eighth of a turn there to compensate for problems from print to print ... and whamo! Suddenly you need to re-level your print bed. Wouldn't it be nice if you could get things level, and then set some sort of indicator to tell you what orientation the nobs need to be returned to in order to reset the platform back to its original height? Well, now you can!

Please remember to "LIKE" if you dig it!

Saw these for the first time in Thailand a couple years ago but they cost $30 for even the simplest. Now you can print your own!

Three STLs uploaded are 5cm tall, 10cm tall, and 15cm tall giving you your baby, mama, and papa lamp shades. Yeah, have fun printing 30 of those 15cm pieces! First one to do so gets a pat on the back.

Scale the parts to your liking for different sizes and piece thickness.

I also added DXF files for diversity

UPDATE:
I finally finished printing a full set of 30 - 10cm pieces to make the sphere and found the diameter to be 18cm/ 7 inches, a little small for my liking. I'll work out the simple math soon so that you can scale accordingly, but just keep that in mind!

Turbines have awesome power in a small package. This one spins up to 60,000 rpm using the airflow of a standard vacuum cleaner, sounds like a 747 taking off, produces amazing power, and sucks up its own dust!

This is an opportunity for someone to make a successful product. I have no commercial interest, and would be delighted if anybody developed it further. A good start would be to source a batch of shafts and spacers for people to experiment with.

The spinning top is an simpler project, also there is a small hand-held turbine rotor just for fun.

This was done as a fun, group build at the Chicago Hackerspace, Pumping Station One. The goal was to make a super simple very small delta. It was more for the fun of the build than anything practical.

We used a stationary extruder and a moving build area because it actually made more sense at this size. The build area is about 100mm diameter and about 50mm tall.

To satisfy the people who said it looked upside down, we actually tried it upside down...it worked. See the video here.

youtu.be/mS2b9j2ok0M

There is a bolg post with all the details here and the complete source files are available.

buildlog.net/blog/2013/04/the-quantum-delta-3d-printer/

Click view full size on the images because Thingiverse is cropping them in the preview window. On most screen it might actually be full size :-)

Update: I added some recent features.
1: Magnetic base. This makes it easier to get parts of the base.
2: I lazy susan filament feeder.
3: Some lighting.

Read about the upgrades here.

buildlog.net/blog/2013/04/quantum-delta-3d-printer-updates/

I have access to many types of printers and this little guy is making the best prints of all of them.

I wanted a motorized gear cube without buying any RC Servos and soldering (except for pla).
So I used lego :)

Video: youtube.com/watch?v=LlPQUbPTgc4&feature=youtu.be

I uploaded the parts of my cube, which works very well with PLA.

NOW YOU, PUNY HUMAN, CAN HAVE SMART WORDS OF ME, FAKEGRIMLOCK, IN REAL LIFE!
.
SIGN HAVE ONE OF MOST FAMOUS THINGS ME SAY, PRINTED IN REAL 3D COLOR PLASTIC. IT CLOSEST THING YOU GET TO HAVE REAL FAKEGRIMLOCK NEXT TO YOU, AND HAVE MUCH LOWER MORTALITY RATE.

After seeing the umbilical torus statue at the Beckman Institue at the University of Illinois, we resolved to make one. The mathematical description (see en.wikipedia.org/wiki/Umbilic_torus) did not easily yield a printable surface, so we modeled it as a rotating triangle in OpenSCAD. The attached code does the equivalent of a rotate_extrude command, with a spinning 2D triangle.

The OpenSCAD file is parameterized to make it easy to change the radius and size of the triangle.

This is a simple adjustable-volume straw pipette. It should be very useful around any wet lab and works nicely with a relatively high range of possible volume settings. You can calibrate the volume but it is generally only good for low precision work. The pipette has two thumb nuts for adjusting upper and lower stops.

To complete the build you will also need a spring (Pez dispenser) but it may work without as the membrane is elastic, a kids balloon, drinking straw, and some tape. Good luck!

See a demo: youtu.be/N2Ax4OGokGM

This is a model of the structure of human cytochrome C. The model is based on the solution structure and the PDB file 1J3S.

This printed well, and is now a completed model. I have painted it and provided some pictures.

This protein is the human version, and is important for the transfer of electrons in the electron transport chain. It has a single heme heteroatom, which I have represented as CPK, along with the histidine ligand. I was a little bit upset by how flimsy it was following the initial print, but actually have grown to like it very much, as it gives one the sense of the fluidity of the protein backbone and structure. It is not as sturdy as some of my other models, but turned out very nice.

Inspired by the (now out of production) Spacewarp roller coaster system, I decided to see if I could make something similar that's all printed. Here's the result!

For examples of SpaceWarp in action, see youtube.com/watch?v=LJK1NxoreDI and follow the links. Or browse around angelfire.com/journal/scottmills/SpaceWarp/spacewarp.html . In particular, the Gallery ( angelfire.com/journal/scottmills/SpaceWarp/Gallery/Gallery.html ) has some good example sets. And if you read the manuals he's scanned and posted, you can see exactly how large, complex sets are put together.

UPDATED: Added parts:
- Loop: flip a ball around 180 degrees
- Tee Bar: makes it easy to run track looping around a vertical bar

This module makes a shape follow another shape to make more complex stuff.

A small and handy safe box with a built in combination lock. The whole box prints preassembled (inspired by emmett) including hinges, the only thing to add are the combination lock dials and rods which easily slide into position.

Two hexadecimal dials ensure a completely safe solution with 256 different possible keys (that is about as safe as WEP). Choose your own favourite key!