When I saw thingiverse.com/thing:9383 by PacManFan I remembered that I also was playing a little bit with lead screws, auges, whatever but "I forgot" to upload it...

It has been hard to find back most of the parts I was printing and using to do those tests and it has been really hard to find the OpenSCAD file that I upload here. I have hundreds of them.

I've choose this OpenSCAD because is the most complete one and the one that is less hardcoded (but still quite a shame). I've put some effort to clean it here and there but still there's no warranty at all that it will work fine.

No warranty neither that the stl provided will fit properly, I think that they should but... who knows????

This time I don't have extra pictures to show (my pleasure), instead I have this video... youtube.com/watch?v=a-4naMl-TOQ

I just hooked up the motors to bot1334 and ask it to build one stl via RepG.

The lead screw provided has a travel per turn of 36mm and I was not modifying the machines.xml to adjust to real sizes.

This is a small 200m test print of some threaded rod I made along with a matching nut. It is a double helix with 1 turn per 50mm. The math works out like this:

For a standard 200 step/ rev stepper motor
50mm / 200 step = .25mm per step
add in a 2:1 gearing or half step motor controller and you have .125 mm/step
add both and it's .0625 mm/step

From what i can tell, there is no perceptible backlash and the nut slides very freely.

I'm sure I'm going to incorporate this into my shuttle system or a printer somehow.
Enjoy...

Edit:
As per request, Here's a video of it:

youtube.com/watch?v=Hkjf8x__SrE
The video shows that it's loose enough to slip down on it's own.
I would recommend printing one to test tolerances for yourself.

Edit 6/18/2011
Uploaded the quad helical nut/thread. This should help with any wear issues, as well as addressing any concerns with backlash.

C60 based structure comprised of Pentagon and Hexagon plates connected to center core by coil springs. I first designed this in 2001. Feel free to download and build

I made one error on this design, the lack of filleting on the "coil to plate core junction" and "plate junctions" will reduce its resistance to fracture from cyclic deformations. However in Nylon it works fine.

1. Always be generous with fillets for surfaces undergoing cyclic tensile stress - especially at the acute apex of the junction.
2. with springs always over model position as typically they will creep deform to a stable state after initial cycling

Note it will Bounce just like a rubber ball

- send me photos - enjoy ! Pat

I decided to make a weighted Companion Cube case for my fileserver. It runs a mini-ITX intel atom with 2 hard drives. The power supply is very unusual so if you are planning to build one for yourself you should check that you have space for it.

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.

Some other turret models have been posted and people have been asking for the model for this one on the flickr set ( flickr.com/photos/7820200@N05/sets/72157626476156514/with/5614051491/ ), so I thought I'd post my progress. There's a lot left to be done, but the white shell parts are pretty much finalized. It's a complex model, and rendering will take a while, this is normal. You can change the $fn variable at the beginning to make smoother curves with smaller facets, but the larger the variable, the longer it will take to render. I've been working on other projects, but if/when I finish this, I'll update this space.

This model is based on careful measurement of images from screenshots from Portal, Portal 2, and Portal 2 promotional materials. It is actual size, as measured by taking screenshots in which Chell can be seen standing next to the turret, and assuming her to be average height for an adult female. This resulted in an estimate that the standing turret is 1.5m tall including the antenna, and the spheroid portion is 1m tall when folded.

Update: thanks to eric1000 for the pics of a 1/10 scale shapeways print!

Update 2: The design now has parameters for size (height of the complete spheroid, "full size" is 1000mm) and thickness of the shell in mm. This should make it easier to produce printable STL files. Also, the different parts are now modules that can be easily disabled at the beginning of the file.

Update 3: I've successfully printed all of the shell parts on my Makerbot with supports at 1/5 scale. Pictures have been added, and I've posted the STLs I used.

Update 4: I've added the black feet and updated the legs with small recesses to insert them into. The scad file is also updated, and includes the code for generating the printable plates.

I was showing off some of my designs at a recent Makerbot user group meeting, and I wished I had tags for them with QR codes and some other relevant data. This bookmarklet will generate such tags.

This is a smaller version, with the QR code on one side and the human-readable information on the other.

Note: I initially set the license to CC-BY for the example picture because the CC licenses look a little nicer on the tags, but I've changed the license to PD, so feel free to use it however you want.

Update: Some errors were reported with the DOM walking, so I rewrote those portions to use Regex instead. This should improve compatibility.

This Eggbot has mechanical Parts, that are mostly made of Fischer Technik (FT).
Fischer Technik is a typical german Toy. See
fischertechnik.de/en/desktopdefault.aspx
I like it very much, because one can design quickly mechanics or little machines like this one.

This Eggbot is a drivat of SphereBot by Zaggo
thingiverse.com/thing:7656
All the Electronics and Software are the same, except of the reference sensor. Still now i easily dont use it.

I was showing off some of my designs at a recent Makerbot user group meeting, and I wished I had tags for them with QR codes and some other relevant data. This bookmarklet will generate such tags.

Note: I initially set the license to CC-BY for the example picture because the CC licenses look a little nicer on the tags, but I've changed the license to PD, so feel free to use it however you want.

Update: Some errors were reported with the DOM walking, so I rewrote those portions to use Regex instead. This should improve compatibility.

This is a stand-alone Public Domain model of a Wankel Engine in OpenSCAD. This is intended more as an example of an interesting mechanism than as a useful engine.

See en.wikipedia.org/wiki/Wankel_engine

The file uses code appropriated from
Leemon Baird's PublicDomainGearV1.1.scad
which can be found here:
thingiverse.com/thing:5505

The original STL is too big, So I have reduced the facet. This is to test that the bearing is printable, but there will be support structure needed. It takes us 1 hour and 11 minutes to print, and only another 3 minutes to remove the support structure. The support is very easy to remove. As long as the support structure is cleaned up, it will be slippery enough. (edited on Sep6)

This bearing has an outer diameter of 51.5mm and an inner diameter of 8mm, making it perfect for making a resistance-free spindle out of an 8mm bolt, for example the one from the stock Rapman spindle. The outer diameter fits perfectly in reels from orbi-tech.de and the photos seen here are made using their amazing custom PLA mix.

This is also just a fun piece to print as it spins freely with hardly any cleaning up!

Inspired by TheRoosters printable linear bearing.

5 piece linear bearing with slack adjustment.
As the plastic wears away you can take up the slack.

This is only a concept and will require refining.

The Slot/Track is modeled at 5mm for 4.5mm BB's
Uses only 3/4 of the BB's required for TheRoosters design

All Parts may require scaling. (if you have to scale it please let me know)

The standard acrylic involute gears were driving me nuts with their incessant CLICK-CLACK CLICK-CLACK noises, so I designed these herringbone gears to replace them. Now I can't hear my printer from the next room :)

The motor gear has a 'floor' to help you position the grub/nut easily and precisely. The rebate for the nut has also been set back from the shaft a bit to make it easier to fit than ever.

An additional advantage is that they are constantly in mesh, so there is no slack to take up when reversing direction (if you use M227, this happens hundreds/thousands of times each print!) so you will have cleaner prints too.

This one has a really nice star shaped base. And a lot of strings! The droopier one reminds me of a spider web. If not for the hole in the base it could be a decent pen/pencil holder.

This Thing was designed with the filament's tendency to droop in mind. Those thin rings in the model should print as single sagging filaments. I designed and printed with 0.3mm layers, but I imagine a little bit larger or smaller should work.

The first print I did was white PLA at 205 degrees. It drooped a little more than I wanted, so I printed it again at 190 degrees. But that one didn't droop at all! I think both look nice. I will have to try again at around 200 degrees though.

I am not sure how much it will droop in ABS, give it a try. Make sure to turn support off!

Dimensions:
77.5mm x 73.8mm x 81.6mm tall

Linear Bearing designed for 608 (skate) bearings and M8 or 5/16" bolts. (File is in Inventor 2011 format, as well as STL). Designed for a 1/2" rod. Two of the six bearing holes are slightly oval to allow for adjustment via the set screws.

Update #1 (06-OCT-2010):
- Fixed scaling issue in STL file.


Update #2 (06-OCT-2010):
- Added mounting holes.
- Added additional STL file without mounting holes.


Update #3 (06-OCT-2010):
- Modified one set of bearing holes to be slighting oval.
- Added set screws to allow for bearing adjustment.

Some weeks ago i found chris schaie's [1] iris on hackaday [2] and i was so amazed that i took a screenshot from the video and made my own iris based upon his design.
From there it was a long road but eventually my own design worked out and i managed to create a mechanical iris that can be opened with a stepper motor.
Now we have a welcoming system at the metalab [3]

[1] schaie.com
[2] hackaday.com
[3] metalab.at

A model of the great pyramid at Chichen Itza, in Mexico.

This is a ring from the Improbablecog: Division of Human Adornment line.

I print them in stainless steel through the Shapeways service, and have also made them available to be printed at cost at: shapeways.com/shops/improbablecog


This piece has been released under a Creative Commons Attribution Share Alike License, through funding collected via Kickstarter, due to the support of the following patrons:
BJ Becker, Boon Sheridan, brepettis, Brian Hawkins, CatFord, Edvard Immonen, Edward Henderson II, GothicCharmSchool, Helen, Ian Nusbaum, Jack C, Jake von Slatt, James Ian Burns, Jess, Jezcabelle, Johnny B Jackson, Katt Tewksbury, Kim Dancy, Lastwear, Leila Smith, Libby Bulloff, Lucas Richter, Lyssa Chartrand, Malcolm Tredinnick, Marguerite Kenner, Melody Burdett, morbidity.unlimited, Nick Setten, Patrick Ball, Peter Simon, Raymond McCauley, Robert Schouwenburg, Sara Mitchell, Sigrid Ellis, strand, Sue Jackson, Theodore Minick

Because of their contributions, you are free to print this model at cost, download the original model files use it, modify it, and even sell physical copies, with the following restrictions:

- All derivative work must be released under the same license.
- You must attribute the original design to Noah Beasley or Improbablecog, and to the URL improbablecog.com

Also, if you do anything cool and interesting with this model, please drop me a line and let me know about it! I would love to promote your modifications, and point people your way to see it.
If you do decide to sell physical prints of this model, that's also allowed so long as you attribute the design. I would be glad to list you as a local reseller on my website as well if you let me know about it :)

That's it, otherwise have fun!

For more information about the work I do, check out: improbablecog.com

This is a magnetic coupling concept that uses 10 of the Makerbot 3mm x 3mm x 3mm Neodymium magnets. These comes in handy when you need to couple two shafts together, but don't want to painstakingly axially align the shafts, within thousandths of an inch.

I measured the holding torque of the coupling, with the magnets inserted into the couplings in both attraction and repulsion. I used a digital torque meter and analog torque watch, until the coupling slipped and recorded the data below.

Attraction: ~43 in-oz
Repulsion: ~25 in-oz

Accepts a 12mm shaft diameter. I plan to make couplings that have smaller shaft diameters later and I am also working on magnetic gears.

Update: Added 3/16" (4.8mm)ID coupling; accepts shaft size of a NEMA 17.
Added a 1/4" (6.35mm) ID coupling; accepts a NEMA 23 sized shaft.

It's the Lambda logo from Half Life 2.

A simple single sided stargate.

This thing is a derivative of:
The "IrisBoxRing" J_Hodgie's Iris Box v2 thingiverse.com/thing:5589
and
Stargate by Glitch

The Stargate was almost the perfect size. I created a cylinder to strip off the little bumps on the Iris Box Ring and combined it with the Stargate, scaled up 2%.

Unfortunately, while OpenSCAD rendered this thing (as per the picture), I couldn't get it to actually generate the resulting STL file. Maybe you can?

I fell in love with hotkey's Ninja Fridge Shuriken thingiverse.com/thing:6383
and so designed a few of my own, and based some on thingiverse.com/thing:323

I put holes in the middle to cut down on plastic a little. and beveled edges but tried to keep it to 60 degrees so you shouldnt have a problem printing them.

Yay! Ninjas in your kitchen! This is a printable "Shuriken" fridge magnet.
SHOW EVERYONE YOUR NINJA PRINTING SKILLS! :-D

Updated: Version 103 has more user-friendly parameters. The 103.stl has an altered impact angle. So if you plan on printing more than one: Download and print both STLs for a more natural "ninja attack" look :-)

3D printable snap-together tank.

Tracks Chain and Pinions is, of course, a derivative of the masterful Chain and Pinions by aubenc (http://www.thingiverse.com/thing:5656).

The drive shaft is also a derivative of Large Threaded Bolt and Nut by ub3rgeek (http://www.thingiverse.com/thing:4880).

Many of the parts are also derivative of my 9 Volt Racer design (http://www.thingiverse.com/thing:4818).

Still wishing for a multiple derivative feature on thingiverse!!!

I like to print successfully before uploading, but this design's been sitting on my desktop unchanged for several weeks. It is designed to work with a pair of 600 RPM DC motors, which I do not have and since I've blown my R&D budget for the next few months, I doubt I'll finish it in the near future. Any help completing this design would be greatly appreciated!!!

You got gears in my weighted storage cube! You got weighted storage in my cube gears!

This Thing is a mashup of:
•Cube Gears by emmett - thingiverse.com/thing:6073
•Weighted Storage Cube (from Portal) by cyrozap - thingiverse.com/thing:1614

This is a sphere made of gears. The hub of the gears is off-center so that the surface breaks up when the gears turn.

This is based on emmett's cube gears ( thingiverse.com/thing:6073 ), but with a lot of improvements to the script. Rendering still takes a long time at first (as much as 10 minutes for this version), but I've added caching so that you don't have to wait that long every time. The render statements I used to do this also stop the OpenCSG renderings from looking like something homicidal impressionist clown with dyslexia painted during an earthquake. I also made the animation work, though even with the caching it won't exceed a few fps. The most important thing, though, is that I added a module to the parameters section to define the shape to cut into gears. You can now make gears out of any STL just by dropping the "import_stl" into this module.

Ok, this one is kinda meta. Continuing with the theme of making stuff into a set of gears, this is one large gear made of eight smaller ones. I used the involute gear script that was already in the scad file from the Eccentric Sphere Gears script and its predecessors, and made a gear to cut the other gears out of. I basically mashed it up with itself.

This piece is designed to have 3mm dia magnets embedded in its side. When several are printed they can be assembled into a gyroid shape.

The sample was printed in a Stratasys BST-768. I'm not really sure how this would go on a MakerBot.