Want to build up a desktop CNC machine without breaking your pocketbook? [James Coleman], [Nadya Peek], and [Ilan Moyer] of MIT Media Labs have cooked up a modular cardboard CNC that gives you the backbone from which you can design your own machine.
The CNC build comprises of design instructions for a single axis linear stage and single axis rotary stage with several ideas on how to combine multiple of these axes together to construct a particular machine. Whether your milling wood, laser-engraving your desk, or pipetting your bacteria samples, the designs [Dropbox] and physical components can be adopted for your end-application.
Perhaps the most interesting aspect of this project is that, at the high level, it is not just a cnc, but a framework known as Gestalt. This architecture enables users to develop their own machine configuration consisting of multiple software nodes linked together with high-level Python Code. Most of the high level computation is organized by a Python library that calls compiled C-code. This high-level framework processes instructions through the desired machine’s kinematics to output commands to the motor controllers. Finally, the top-level interface does away with the archaic GCode with two alternatives: a Python interface consisting of function calls to procedures and a remote interface to make procedure calls through http requests. While the downside of a motion control language is that commands have no standardization; they are, however, far more human-readable, a benefit that plays into the Gestalt Framework’s aim “to be accessible to individuals for personal use.”
In the paper [PDF], [Ilan] expresses the notion of a tool as an impedance-matching device, an instrument that extends the reach of our creativity to bend and morph a broader range of shapes into forms from our imagination. Where our hands fail in their imprecision and weakness, tools bridge this gap. Gestalt and the Cardboard CNC are first steps to creating a framework so that anyone can design and realize their own impedance-matching device, whether they’re weaving steel cables or carving wood.
The folks at MIT Media Labs a familiar heavy-hitters in this field of low-cost machinery, especially the kind that fit in a suitcase. We’re thrilled to see a build that reaches out directly to the community.
Hexapods are wonderful things. With their elegant gait and insect-like caricature, they’re an instant hit for coffee-table-conversation-starters. They’re also wonderfully expensive, with the redundancy of each leg chewing viciously into your pocket. This price point is a deal-breaker for many, but for others, it’s a challenge to let one’s design skills defy that barrier. [Mike Estee] is one such engineer who’s done his best to design away a stock structure with a cardboard variant that wont break the bank.
On the table, [Mike] assembles his hexapod frame from budget servos, corrugated cardboard, paper clips, and tape. The result is a hexapod frame that can be built for practically just the cost of the servos (about $80 in this case). In his posts, [Mike] details the design evolution of the frame focusing especially on the legs, which he intended to be folded from a single sheet. After a few revisions, [Mike] succeeded, and he’s graciously posted his latest revision on his blog [PDF].
While we’ve certainly seen impressive budget hexapods before, we really appreciate the elegance and simplicity of a design made entirely from a single sheet of cardboard. His progress is a step forward to reaching a ubiquitous low-cost, force-control based robot platform. While that’s a milestone many of us hope to see in the future, he’s done a fantastic job designing a proof-of-concept frame template that anyone can cut out and assemble with a couple of spare hours.
Continue reading “Fold a Hexapod from Pilfered Office Supplies”
Ever since Google Cardboard came out, [Julian Jackson] had been meaning to give it a shot. Affordable virtual reality? Who wouldn’t! But, he never got around to it — until one day he was sitting in McDonald’s with his son, explaining to him how the latest Happy Meal toy worked — it was a pair of penguin binoculars.
Fast forward past Thanksgiving and Black Friday and [Julian’s] son had completely forgotten about the McDonald’s toy in all the excitement, so [Julian] asked if he could have it. His son was mildly confused, but curious also, so he let his dad take his toy.
After attempting to dismantle it with a screw driver to get at the lenses, [Julian] carefully calculated the best place to simply break it without damaging them. With the precision of a heart surgeon he swung back his trusty hammer… Continue reading “Happy Meal Hack Produces a Google Cardboard Test”
Back in the 70’s when computers were fairly expensive and out of reach for most people, [David Hagelbarger] of Bell Laboratories designed CARDIAC: CARDboard Illustrative Aid to Computation. CARDIAC was designed as an educational tool to give people without access to computers the ability to learn how computers work.
The CARDIAC computer is a single-accumulator single-address machine, which means that instructions operate on the accumulator alone, or on the accumulator and a memory location. The machine implements 10 instructions, each of which is assigned a 3-digit decimal opcode. The instruction set architecture includes instructions common to simple Von Neumann processors, such as load, store, add/subtract, and conditional branch.
Operating the computer is fairly simple–the cardboard slides guide you through the operation of the ALU and instruction decoder, and the flow chart shows you which stage to go to next. The program counter is represented by a cardboard ladybug which is manually moved through the program memory after each instruction completes.
Even though the CARDIAC is dated and very simplistic, it is still a useful tool to teach how microprocessors work. Although modern processors include multi-stage pipelines, finely-tuned branch predictors, and numerous other improvements, the basic principles of operation remain the same.
Feeling adventurous? Print out your own CARDIAC clone and try writing your first cardboard computer program.
While others are absorbed in baseball playoffs, [Aidan] has spent his recent Octobers planning incredible Halloween costumes for his son. We don’t know what he did last year, but there’s no way it’s better than this laser-cut cardboard airplane costume.
He had a few specs in mind and started with a model of a Grumman F4F-4 Wildcat from 3D Warehouse. Using SketchUp, he simplified the model and removed the landing gear and the propeller. [Aidan] created a simpler model on top of that, and set to work changing the proportions to make it adorable and toddler-sized.
To build around his son’s proportions, he inserted a 10-inch diameter scaled tube vertically into the model and squished down the fuselage in SketchUp. The plan was to have it laser-cut by Ponoko, which meant turning the design into flat pieces for them to cut. He ended up with 58 parts, many of them mirror images due to the symmetry of his design.
When the box from Ponoko arrived, [Aidan] was giddy. He was astonished at the quality of the pieces and found the plane very satisfying to build. But, he didn’t stop there. Using LayOut, he created a custom instrument cluster with reflections and shadows. The plane also has a Wii steering wheel, a motorized propeller, and of course, decals.
This cube lamp was assembled using common cardboard. Not only does it look interesting, but it’s basically free with every Ikea purchase since all you need is a source of cardboard, cutting implements, and glue.
[Lindarose92] fabricated the shade out of narrow strips of corrugated cardboard. This particular lamp also has a cardboard base but we’re sure you could use it for just about any light source with doesn’t generate enough heat to cause problems. The build starts out with the tedious process of cutting 5mm by 8cm strips, and you’re going to need a lot of them. Each strip is cut perpendicular to the corrugation, which allows the light to shine through the wave pattern. The strips are then glued into 8cm x 8cm squares, which are in turn glued together into the four by four panels that make up each side of the cube.
Boom, you’re done. And if you get tired of it, just toss the thing in your recycling bin.
[via Hacked Gadgets]
The image to the left doesn’t make this look like much, but inside of the cardboard vending machine lives a clever Rube-Goldberg device. The video after the break gives a look at the inner workings to show how a quarter manages to dispense a full can of Coke. But that’s about all the detail we get on the project.
There are two sets of counterweights used in the design. Some marbles, and what look like giant pinballs. The coin chute, located on the left side of the venting machine, funnels the money into the waiting marble. When the marble rolls off it lands on a spoon. The weight rotates the spoon-filled disk and causes one of the waiting pinballs to drop from their rack. As that metal ball falls it operates a ratcheting system to dispense just one can. It looks like the capacity of the machine is limited to two refreshing cans of sugary liquid, but that could be scaled up if more room were made for cans and counterweights alike.
Continue reading “Rube-Goldberg provides liquid refreshment”