This hand pump is located at the Wilson Montessori school Wonderground SPARK park in Houston wilsonspark.org/ It gives the kids a safe way to get water to play with, and demonstrates James Watt's straight line linkage.

I found an antique Hermes Baby typewriter in a shop. It was in working order but way too expensive, so I thought, "why not just print one?" I have a MakerBot, and I can print anything!

So I scanned the typewriter into an STL file, then used some CAD magic to split it into individual STL's ready for printing.

The finished product works wonderfully. I've made some modifications to reduce the depth of the keys and reduce the chance of jamming it.

It is somtimes useful to include cantilever springs in a plastic mecanism. But, because of the many variables involved in printed plastic parts, there is very little information on the properties of the material. Thus experimenting with many different desings become a solution that consume a lot of time and resources.
This device is intended to measure the elasticity constant (Young's modulus), the yield strength (the force required to deform the part) and the ultimate strength (the force required to break the part)

This is a fork
You can Eat with it
You can stab things with it
You can launch it with a device made to launch such objects


This thing has changed the world, can you?

This is a fork
You can Eat with it
You can stab things with it
You can launch it with a device made to launch such objects


This thing has changed the world, can you?

Steel rabbit target. Bulls eye is a trigger. When hit, the target spins Powered by a weight on a cable which is wrapped around an axle. Made of materials to withstand low caliber shots.
youtu.be/Fta_Ps9fvfA

Solid Works Drawings of a Mendel that is all metal, uses linear bearings on all axis and dual belts on X and Y to cope with extra weights involved.

This printer was started as a result of my friends astonishment of what i was able to make using a cordless drill and a hacksaw. my repstrap didn't sit flat or square it wobbled, i used lead screws to drive all the axis' as a result it was slow best speed i could get was 1000rpm ~650mm/min, but at that speed the frame wobbled and the resulting prints had waves in 6 different directions :P

This is part of an audit of the Prusa Mendel to improve stiffness and reliability.
Other byproducts of those concerns:

thingiverse.com/thing:11017
thingiverse.com/thing:10994
thingiverse.com/thing:15606

There is ancestry for this thing in Thingiverse, as a case for including a drilled out and tapped M5 nut to secure a pulley on a motor shaft has already been published. Cannot happen to find that design right now.

* This method addresses concerns of slippage along smooth rods: the trapped nuts on the idler and motor ends of some of the Mendel x-end designs are held by very few layers of plastic. This drastically limits the pressure one can appply to fix in place the smooth rods. Symptoms might include the need to frequently adjust / re-tension the x axis belt. Some designs address this by closing the rod channel ends, but rod length may then be an issue.

Alternative solutions dealing with plastic: to significantly increase the number of layers under the trapped nuts; a printed collar piece like thingiverse.com/thing:2454 (but less pressure can be applied with that one); bolted brackets (like Selis Mendel), closing out the ends of the rods channels (but rod length issues may arise then); commercial shaft collars (expensive!), etc.

* This low cost solution will allow you to tighten and secure the smooth rods with significant pressure. To secure a Prusa Mendel's X rods you'll need to prepare 4 of those. Can come handy in many other situations.

Note: I drilled them at 180 degrees for expediency, but have learned since then that the optimal solution would be 90 degrees between the screws. drilling the center of faces 120 degrees apart might be an acceptable compromise.

Dino-girl's flatpack spider milled from aluminum.

Shiny arachnid go!

I built this CNC router from designs I saw all ver the place and like the idea of using aluminium channel and steel. I simply built the table then measured the gantry to suit. You can build any size this way as long as you re-enforce properly. The control board came from HobbyCNC and the motors are NEMA 23. The power supply I built (simple 24v 7A).

I made the head in Hexagon 2.5.0.5. I wanted the head to look like the head on the new Robotis robot DARwIn-OP.

robotis.com/xe/

mike-ibioloid.blogspot.com/

sourceforge.net/projects/darwinop/?sms_ss=blogger&at_xt=4cf135c87d86608b,0

3D model of the superman returns logo. Modeled in SolidWorks using an image as reference.

UPDATE 2010-03-19
I've added new pictures and completed the build and usage instructions. I spent my time on those so am still cleaning up the OpenSCAD files.

UPDATE 2010-03-05
I've uploaded two new STL files. These supersede all previous versions:

* MouseMotel_0.3.stl
* MouseMotelLid_0.3.stl

These are for a 70 mm ID bottle. I used a 20 oz/591 mL one.
I've uploaded an OpenSCAD screen grab of the parts assembled to show how they go together.

Once I clean up the MouseMotel.scad file I will upload it too.

UPDATE 2010-03-04
I've uploaded an STL file of the main part. I still need to tweak the flap that contains the mouse.

UPDATE 2010-03-02
Look at the photo; mine works!
And it's still alive!

;)

Seriously, since any garbage can contains a suitable enclosure for the trap, i.e., a soda or water bottle, I decide to focus on creating a printable one-way flap that can be fitted to a cut-down bottle. This reduces the size and number of parts necessary for the trap and because I used my favorite modeling tool, OpenSCAD, I parameterized the design so it can be used for bottles of various diameters.

Here's the basic concept:

* Cut off the top of your selected bottle
* Size and print a ring that fits inside bottle
* Print flap that sits inside the ring
* Insert 2 3 mm captive nuts into holes on outside of ring
* Insert ring into bottle
* Punch/cut holes for stabilizers
* Insert stabilizers into captive nuts
* Insert a length of 3 mm plastic feedstock to function as the flap hinge pin
* Place motel at desired location
* Bait motel with peanut butter
* Wait

The mouse will smell the bait, enter the one-way flap in the bottle to get it, and be trapped!

The stabilizers on either side of the bottle will keep it from rolling around as the mouse explores its new home.

I'm still working on a few details, and will update this thing as I finalize them.

My Second design of a small geometric sculpture that explores the battle between cake and pie