For a graduate course I was doing I needed two webcams that would produce rectified (no rotation and only translation along 1 axis) stereo images.

To compensate for any imperfections in camera positioning there are adjustment screws to change the camera angles as needed.

This is a ducted fan mount for a Makerbot/Cupcake with MK5 Extruder. It seems to successfully stop small objects from turning into molten blobs.

The whole thing clips into the extruder mount. It uses an old fan from the junk box, I think it was from a graphics card or similar.

Mostly cools the current top layer of the printing object without pushing the platform heater into desperation. I'm running the fan through a 200 Ohm potentiometer, to control the airflow.

The air flow is down and towards the nozzle, roughly 45 degrees. The air follows the extruder hot end and reaches about 60 degrees by the time it hits the object.

Here are some miscellaneous toolholders that can be scaled to fit practically any tool.

I was in the market for something like this myself, and was looking around searching for toolholders. The problem however is that there ar alot more different sized tools than there are toolholders that match, so then you end up with something that just looks awful and doesnt fit 100% to anything.

So regarding this project the goal was to make many different shaped toolholders that could easily be customized to fit any tool.

And again a big thanks to the makerbot crew for the plastic that made this:)


(Just an FYI - Everyone of my toolholders are printed on my full size makerbottable makerbot thingiverse.com/thing:3285)

This is copied from "thing:9681"

Printing Testpart for RepRap Machines by Patrick

thingiverse.com/thing:968

We as a community of "fabbers" need to have some sort of standard to gauge how our machines tolerances are evolving, Patric has made a good start.

Here is an awesome pen holder in the form of a fish ;)

This is thingiverse user dom's laptop stand (from this comment: thingiverse.com/thing:32#jsid-1237162568-10), with the Hokusai Wave pattern. These are dom's improvements over the original laptop stand design:

- less sharp edges on the bottom
- slightly longer stands so 15'' notebooks also fit
- a 90 Degree Angle at the holding area, so the notebook has a smoother fit
- also made the holding area slightly deeper for a better fit

It fits my 15" Macbook Pro perfectly (only problem is that I laser-cut the notches too wide; jamming a piece of paper in them fixes this - no more wobbling).

I discovered that the first derivate I made of this didn't work perfectly with my Macbook Pro 15": The hinge was hanging a few centimeters out from the far corner, so opening it while in the stand would lift the front of the stand. So this variation features a 30 cm long holding area: This is slightly longer than a 15" Macbook Pro, and should hold a 17" one just as well.

It also comes with a cable guide hole, cut to fit underneath the wave. If you want to put the stand up on a desk and leave it there, you now have a way to reduce cable clutter, too.

I re-did the shape in qcad and Stefan, an Illustrator master at the Metalab (http://jain7th.soup.io/) helped me make the outlines that mimic the wave a reality.

This is for mounting a Parallax Ping))) ultrasonic sensor on a servo. This is useful for robot navigation and mapping.

There is also a Shapeways optimized version available.
shapeways.com/model/80059/sonar_servo_mount.html

This is the Sanguino board. It is an Arduino compatible board based on the atmega644P. This page will tell you how to assemble one, probably from a kit that you bought somewhere. Once you are done, you'll have a sweet little board you can use for prototyping, hacking, or even for a permanent project.

The Sanguino has some awesome features like:

* 64K of flash space
* 4K of RAM
* 2K of EEPROM
* 2 hardware serial ports
* 32 GPIO pins
* 6 PWM pins
* 8 analog pins
* I2C, SPI, etc.

Perhaps one of the funnest projects we have attempted around the .:oomlout:. offices. A five degrees of freedom robotic arm. While we have spent many hours twisting knobs to move pop cans from one point on our desk to another sadly it has not progressed much further.
The main reason for this is the sum total of math knowledge around the oomlout.com offices is about 4 (don't ask us to show our work on how we calculated this) so inverse kinematics is well beyond our reach.

We are releasing it in an imperfect form in the hope that the clever Thingiverse denizens will be able to make it better.

Why this isn't quite ready for sale:
-We lack any inverse kinematics program which makes moving the arm intelligently nearly impossible.
-Without software limits on the servos it is capable of stripping the low cost hobby servo motors (this is alright for testing as they are only five dollars) (we have stripped two in the life of our arm and both happened when we were asking it to do silly things) (this can be fixed by upgrading the servos)
-We haven't completed the 3d model or assembly instructions just yet, but by studying the photos it is possible to assemble. (think more jigsaw puzzle than lego set)
-The gripper, lets just say the gripper needs a little work.

That said it is an amazingly fun toy to play around with, and a good starting point if anyone has ever had a desire to make the perfect robotic arm (it is open source so you'd be free to make and sell your own)

(shameless plug)

For more details about becoming a Robotic Arm Developer visit our blog
(http://www.oomlout.com/blog)

This is my second prototype of a Sarrus linkage type linear axis. A Sarrus linkage uses hinged joints to make linear motion. The idea is to have a linear bearing suitable for making part of an x-y cartesian assembly without needing long polished metal rods, thus getting a 3D printer that can make more of its own parts.

Notice that there is a set of 4 holes on the top armature that match 4 hole patterns on the end pieces. This means that one axis could mount on two others at right angles.

Drive system: DC motor from a cheap garage sale inkjet printer, using the timing belt from the printer. The pulley at the other end of the belt is a screw/washer/spacer combination with a skate bearing. The skate bearing is mounted in a flexure plate style mount to give tension the belt.

Optical feedback: I took a optical quadrature encoder and encoder strip from the same printer as the motor. The encoder is mounted on the moving armature, and the strip is anchored at both ends in the end blocks.

Hinges: The hinges on the Sarrus linkage are made with 1/16" diam brass rod as the hinge pins. The holes for the hinge pins were reamed out with a 1/16" drill bit.

Frank Davies

An eight-legged big spider robot.

The design goal was to create a legged robot that is large enough to walk regular stairs and strong enough to lift simple loads. It also had to be simple enough to use regular RC-srevos and could be cut with my minimal CNC machine.

youtube.com/watch?v=gNXuzhop-u8

youtube.com/watch?v=mSzAuPa47WA

The build process is documented here:

roboternetz.de/phpBB2/zeigebeitrag.php?t=39810&highlight=