I am collaborating with the Betty Brinn Children’s museum to create something similar to this.
This sculpture has 844 balls hanging from strings wound around a pulley on a DC motor shaft. Ours will feature somewhere between 320 to 500 balls. I am currently working on a prototype to test and qualify different electronic and control platforms. It’s made out of 40mm x 40mm aluminum extrusion, laser cut wood motor mounts, 5V steppers, and ULN2003 based stepper drivers. I have been using an Arduino mega for now to test the motor and drivers.
The next step is to write software to create “voxels” with instructions akin to G-code. Additional software will be necessary to simulate the animation. G-code like instructions will be used by microcontrollers to control steppers in order to create an animation.
We hauled Baby Burrito to the fairgrounds to tool around on during the event, and race it if needed. Tom managed to get a flat tire (!?) and left it somewhere (!?) and the next day when he went back to get it, it was gone. (!?!?!)
Be on the lookout for this slow moving vehicle. Also, it has no brakes, though you can “fire the retro-rockets” to stop it, which involves hitting the reverse button quickly to stop the forward motion.
If you know the whereabouts of Baby Burrito, please let us know. We aren’t out to prosecute anyone, we just want our silly car back.
You may remember it from such events as the South Shore Frolics 2014 parade. (Though you won’t see it in the video, because I was driving it and had the camera on my helmet!)
If you haven’t heard, we co-hosted the Maker Faire Milwaukee last weekend. Over 26,000 people attended the inaugural event at the Expostition Hall at State Fair Park! Here’s a few highlights from the event.
This is your invitation to get out and explore Milwaukee!
We’re just one of several dozen buildings that will be open this weekend for guests to come and visit. We will be giving tours both Saturday and Sunday this weekend, between 10 AM and 5 PM. If you visit, please enter at the north side of our building which is on Otjen Street.
My recent acquisition of a Meade ETX-90 telescope with computer go-to system for locating objects in the sky got me thinking that it would be nice to have a system to locate objects in the sky when you’re looking through binoculars or a telescope that doesn’t have a computer and motors to drive it. To that end I came up with the idea of mounting a green laser pointer, commonly used by astronomy nutz to point out objects in the sky to noobs, on a cell phone or tablet running a program such as Google SkyMap or Skeye.
CAD rendering of the parts
After much thought and a few prototypes I came up with a system that allows a laser to mount on a phone and that assembly to mount on a tripod, a handle, or a telescope. The tube that holds the laser has adjustment screws to allow the laser to be aligned with the SkyMap on the phone. It also has to slots that fit over standard gun sight rails. On one side I have a phone/tablet bracket that has a gunsight rail and slides into the laser tube, and the other side can be used for a rail that mounts on a tripod or a handle. Extra rails can be mounted on telescope tubes. I haven’t yet designed a binocular mount, but will soon.
Parts printing on MegaMax
I printed the parts on MegaMax with Octave fluorescent red filament (that’s why the colors vary in the photos- the flash apparently excites the fluorescence in the picture with the handle). All the parts fit VERY tightly together but I included screw holes for extra security. The phone/tablet mounts on the bracket using velcro tape. I think it may be better to print or buy a cheap case to fit the phone than screw it to the phone/tablet bracket. I’ll be posting the design files to Thingiverse shortly.
Years back, I used to throw a lot of cocktail parties. Between myself and two good friends, we owned five cocktail shakers and 35+ martini glasses. During the parties, we’d typically be the only three people shaking martinis for all the guests. Though that’s awesome, it also means we missed out on much of the socializing and mingling during each party. In preparation for a recent birthday party, the solution came to me: Use Lasers! So, I laser cut ten coaster-sized pieces of basswood and then laser engraved my twelve favorite Martini and Champagne cocktail recipes on them. I also cut stands for them that had a laser engraved “best practices” guide for shaking Martinis – you know, the things that bartenders are typically too busy to do for you: Chill your glass before pouring your drink into it, shaking your drink until it is sufficiently cold, etc. The drinks have recipes that taste better than what most bartenders will make for you, because they include things like an amount of lemon or lime that they’re too busy to squeeze into your drink. The party was an even more awesome experience for me, because I wasn’t only shaking drinks all night. It was also even more awesome for the guests, as they found that great cocktails are super easy to make! And who doesn’t like to make things? Also, the carbonated Gin & No tonic is real crowd pleaser! See my previous post about home carbonation for more info, and note that all types of inappropriate things can be carbonated: Gin, Ardbeg Corryvreckan, grapes, etc!
We’re planning on setting up a Nerdy Derby track at the upcoming Maker Faire Milwaukee so to that end we are preparing car parts. We recently received a generous donation of filament from Inventables (thank you!) so MegaMax and others went right to work printing wheels for the Nerdy Derby cars. The goal is to print 4000 (!) wheels before the Maker Faire.
A small batch-test run of twelve wheels
Starting a batch: printing 40 whimsical wheels and once!
We recently got in a CubePro Trio from the folks at 3D Systems and while we’ve still got a lot of testing to do, we’ve started to run it through its paces.
It’s definitely a nice looking machine. Professional quality build all around. Matt N. spent some time setting it up and hit “print” on a rather challenging model (with tiny spires and everything!) The first print turned out OK, but as with any 3D printer, there’s probably a bit of tweaking (or reading of the manual) to do.
We’re excited to see what our members can do with this machine, and how it compares to the MakerBot, LulzBot, and Solidoodle we currently have in the 3D Printing Lab.
September 27-28 at Wisconsin State Fair Park, the same weekend as Harvest Fair. Admission is free. Maker Faire Milwaukee's Call for Makers is now open.
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