The sound of the engines at the Reno Air Races is truly incredible, but this year one in particular caught my attention. A Sea Fury flew past with its original Bristol Centaurus engine, and the sound was notably different than the other radials, very low and smooth. It turns out this is a sleeve valve engine, which explains the different sound. I figured it'd be a cool thing to make a model of.

Well, it turns out the Bristol Centaurus is not a simple engine (seriously, that's an understatement). However, during the search I came upon an alternate sleeve valve design used in radio control airplanes. This design is not only simpler than the Bristol Centaurus, but is actually simpler than any other 4-stroke piston engine I've seen: rcvengines.com/how-it-works.htm.

So, here is a fully printable, snap-together model of a 4-stroke engine that clearly demonstrates the four strokes: intake, compression, expansion and exhaust. What I'm most pleased with is that the tolerances allow it to spin easily, yet you can still feel the difference in torque between the compression and exhaust strokes.

This is a replica of the Small energy cell Ammunition for the Laser pistol in fallout 3/ Fallout new Vegas. I’ve made two versions of this; one is fully printed and accurate to the game files but with a far higher detail level. The other was designed when I noticed that the cells in the item are almost exactly the same size as AA batteries and is designed to accommodate three of them making an actually functional cell (I’m actually thinking of designing a battery compartment to fit these, it should be trivial)
I’ll put up a better pic as soon as I receive the grey filament I’ve ordered.

Plastic insert for the ElevationLabs Elevation Dock to use an Apple Lightning cable instead of the 30 pin dock adapter it comes with.

This is orginally based on the thing thingiverse.com/thing:31429 but the calibration between whatever was made to print that and my replicator is off. The lighting cable would not even fit in to the rectangular hole they used.

This fixture makes it easy to cut small gauge brass or aluminum tubing with a regular hobby knife

Stack Them, and shake them. and your work is done.

The Lyman Filament Extruder is a machine that extrudes filament from pellets for use in a 3D Printer. It can extrude 1.75mm and 3mm filament with easy nozzle exchange. The material cost is about $250.

A playful vase or flower pot.
Made from a four generation binary tree, with a two generation cavity.

Images show a preview render of the Ceramics look and a black ABS version printed using an Up!

I designed this for the GrabCAD/Figulo Ceramics challenge, but I missed the deadline.

Since it was intended to be shared, here it is too :-)

Wall thickness should be enough for professional ceramics printers.
So I guess it will print fine on most home printers.

To support my design efforts you can also buy the ceramics version from my Shapeways Shop here:
shapeways.com/model/621640/BinaryRoots.html

I only kept the middle chainring on my bicycle because I was barely using the two others anyway.

This chainguard replaces the outer chainring and prevent the chain going off the chainring on this side.

It fits the 5 bolts 94BCD crankset (aka compact mountain bike cranckset) with a 32 teeth chainring.

A simple process art piece where a gestural line is drawn in Inkscape and extruded in OpenSCAD to create a 3D form. This cylindrical shape is then re-factored in MeshLab to make geometric vases. These were made for Chapter 9 in Practical 3D Printers apress.com/9781430243922.

Designed with fractals.


Size: 100x100x170mm
Wall thickness: 6~7mm

3D Print it with Glazed Ceramics at Ponoko.com (USA) , i.materialise.com (EUROPE)
or use white ABS / PLA.




Enjoy,
3Dizingof.com

Cover for power supply.
I made it for the MeanWell I bought but it should fit any psu with the mounting holes as they seem to be pretty standard probably.

Derivative of the part ps-cover-1off.stl from thingiverse.com/thing:20968

I took out the bit on the inside.
Made the whole thing bigger.
Put bigger sides on with holes lined up with the mounting holes on the PSU.
Needs to be a bit longer, I think, but it fits with mine. I did have to bend the pins on the power input though.
Flipped the power input and output holes over to match with the terminal pins.
Made with Google SketchUp and netfabb Studio

I copied the same licence as the original.

So I wanted a super screwdriver! Had to be small yet balanced, universal, yet fit in the palm of my hand, and able to be used with one hand.

No lasers? Na not this time ;)

I present my swivel driver.

Used blender to add superness.

Added a small paw version with less weight and more plastic. Still very balanced.

Get ready to roll with this magnetic marble race track! It’s simple to build and easy to expand - the only limit’s the size of your refrigerator door!

    Who can build the longest track?
          Will you beat your friend in a head-to-head race?
                  How far can your marble jump?

               ----- Thingiverse wants to know! -----

This is the low-cost prototype of a robotic arm with 6 DOF, 3D printers manufactured and designed using free software (OpenScad, Inksape..).

**
EDIT: these files have now been removed. look on github instead.

Until things have been cleared up re: licensing, selling and generally being cool with the OS community again.

**

Brief: to create an open design that allows people with varying levels of arthritis to use aerosol cans. Existing products on the market are either very expensive or still require quite fine dexterity to use.

We designed and built these using mainly a laser cutter and acrylic sheet stock, with some use of a lathe to turn a flexible plastic part.

Created as part of the Hackshack project for Full Circle Arts, Manchester.

fullcirclearts.co.uk/projects/hackshack-all-about-the-process/

Materials list:

5mm acrylic sheet

3mm acrylic sheet

Delrin or Nylon plastic bar stock

M5 + M3 hardware, see design files for full listing

Designed with Fractals.
Use as a decorative Vase or Light Shade.

Size: 150x150x150mm
Wall thickness: 3 to 5mm at the base.

3D print it with ABS, PLA

The top part is elevated so a little to none support is needed.


Note the optical illusion of a crisscross.

This is a cover for a led powersupply I bought on ebay to power my Prusa. The cover has a switch , a power connector, a strain relief and lots of holes to attach it to something with tie wraps

A clock with a chain that rotates around the minute shaft. Once every hour a nuber will be at the top.

It uses a regular quarts motor for wall mounted clocks.

The design is inspired by a clock made by Andreas Dober 1993 for Anthologie Quartett.

Hexagonal cloud wall-hanger. Comes with two holes for wall-mounted screws 2 1/4" apart. Modeled in Maya. I've yet to stress-test it for how much it can hold, but I presume it's quite a few pounds.

In an event of emergency, print this.

This is a processing sketch that generates Eagle BRD files for a heated bed based on parameters you specify. You can make it whatever size you want and use trace widths and spacing as needed to get whatever resistance you want.

THIS HAS NOT BEEN TESTED! I suggest making a small cheap board with an easy to measure resistance like 50 Ohms or so, ordering it through a cheap service like BatchPCB, and verifying that the calculations were correct! Throw on a cool design and you can make coasters out of your example boards. :)

This sketch uses Processing 2.0 (not 1.5, though it could be modified for that - look at the XML handling) to generate a native eagle BRD file using their new XML format, so everything is nice and clean.

Generate a board file, look at the Processing output window to see what the resistance, current, and power draw will be based on your input voltage (I can't guarantee those numbers are correct! I haven't tested this yet and I admit I wrote it pretty quickly - its more of an example. You should double check the length calculation section of the code - god forbid I messed something up and you waste money on a bad run of boards!)

The files are hosted on Github, so check there for any updates:
github.com/tlalexander/ReprapHeatedBedGenerator

This micro quadcopter is 3D printed with ABS plastic parts. The arms are capable of bending without fracturing under a heavy impact, yet they are rigid under a normal load. These attributes are perfect for a micro multicopter frame.

Kits and parts are available for purchase from my website:
polakiumengineering.org/?page_id=1989

Eventorbot! Open source 3D printer. Simple with less materials. Frame is made of a single 4' long, 2 1/2" square tube (16 gauge/1.5mm/.0598" thick, cost: less then $20.00). With the design there is less plastic parts, stronger structure, all wires are hidden, and a more appealing/finish look. The blue print file will get you more familiar with the construction of the unit. The downloadable file is my blue print that I designed and used to build the machine. The accuracy is to the exact of my build.
For more images and updates like:
facebook.com/pages/Eventorbot/111169638934671

The unit is supposed to resemble a robotic arm with hydraulic tubes. It was designed for prints to be less affected by vibrations. With the 1 solid frame, any vibrations of any axis will cause the other axis to move with it. For example: If the X axis causes a slight vibration/1mm movement to the right, the Z and Y axis will also move that 1mm to the right. This will result in a better print as everything will remain squared.


For those who do not have access to a 3D printer. You can order the plastic parts and frame at: kickstarter.com/projects/1874396831/eventorbot-open-source-3d-printer

Eventorbot has met its funding goal!

Well, I'm speechless and overwhelmed with all the support. I will like to say a BIG thank you for all the support, kind words, and to all the backers. To be able to share and have your interest in something I created is a great feeling. Everyone of you guys have made something that was a big dream become reality. Eventorbot, as a 3D printer is now going to happen! You will have no regrets in owning a Eventorbot, our machine will be a strong contender.

Thank you... thank you... thank you...

This is a 3 extruder setup with a single hot-end combining nozzle, to 'mix' and blend coloured filament plastic or different materials on a RepRap or other 3D printer.


Also check out my blog at richrap.blogspot.com and

website at richrap.com

And Youtube Channel - youtube.com/user/RichRap2011

This is a derivative of Prusa's excellent PCB heatbed. It has two major additions.

First, it has a place to solder a surface mount thermistor with pads on the side to connect to the electronics. Hopefully we won't have to tape a thermistor under the bed anymore.

Second, there has a spot for a surface mount right-angle LED on the side of the bed instead of soldering a normal LED facing down like the Mk1.

To keep my screwdrivers in place I designed a very simple rack for six tools. It is perfect for WIHA PICO FINISH tools, like the one supplied with the Ultimaker.

One of my USB sticks had a cover that broke open, so I made this! It's a from thingiverse.com/thing:17656, cleaned up, modified slightly, and smoothed in Blender. There's a hole in the top half of the model for fitting the innards of a USB stick, and the bottom half slips over the USB plug to form a cap.

The USB stick sticks out slightly in the back, but I didn't want to slide the top half of the model forward because of stability reasons. I might make another version with the USB stick positioned slightly forward - I didn't do that originally because the walls were a bit thin in that position, but I'm sure with some modifications it could be made to work.

Stool that can be assembled and disassembled.
This stool was created at ProtoSpace, the Fablab in Utrecht.

In progress design -- pictured is the paper prototype, but I don't know enough about 3d printing to get it to come out right:

publiclaboratory.org/notes/warren/7-17-2012/failed-3d-print-mobile-spectrometer-attachment

publiclaboratory.org/notes/warren/6-12-2012/mobile-android-version-spectral-workbench

Software: spectralworkbench.org/

This design is released under the CERN Open Hardware License 1.1

publiclaboratory.org/tool/spectrometer

Claystruder 2 is a prototype for paste extrusion that is build around a standard fairly lowcost disposable industrial auger extruder. This design is a testbed and not meant as an elegant design. Read about this extruder on unfoldfab.blogspot.be/2012/08/road-to-better-paste-extrusion-episode.html