[Caleb Peters] looked at the Shapeoko 3 CNC kit, a kit designed to make building an entry level CNC router a possibility for anyone, a kit to take the guesswork out of the equation, a kit that removes all those difficult technical barriers. He looked at all of that ease and thought, “nah.” He wanted to learn! So he decided to build one the hard way. Like the early American Pioneers, he’d build his Shapeoko from scratch, suffering piously all the while.
His goal was to build an improved iteration of the Shapeoko 3, for less than the price of the kit. The first problem was the rails the gantry would run on. Inventables wasn’t going to sell him the rails, and he wasn’t sure if the delrin wheels used would be able to hold the weight of his heavier design. After some strife he determined that aluminum hard coat rails and steel wheels should last long enough, and if the aluminum wore away, the more expensive steel rails were a drop-in replacement.
Similar problems were overcome at each step. He couldn’t exactly copy the Shapeoko design. The Shapeoko’s steel pieces can only be made on a larger machine like a waterjet or industrial laser. He did have a knee mill and managed to cleverly avoid the need with some slight redesign. He kept at it, doing cool things like drilling a hole through the housing of a wood router, used as the spindle, and putting a hall-effect sensor just behind the commutator and brush assembly to get a spindle rpm reading.
Fortunately for us, he documented it all very well and filmed a nine part video series; the last of which you can see after the break.
Continue reading “Build a Shapeoko The Hard Way”
In an ambitious and ingenious blend of mechanical construction and the art of dance, [Syuko Kato] and [Vincent Huyghe] from The Bartlett School of Architecture’s Interactive Architecture Lab have designed a robotic system that creates structures from a dancer’s movements that they have christened Fabricating Performance.
A camera records the dancer’s movements, which are then analyzed and used to direct an industrial robot arm and an industrial CNC pipe bending machine to construct spatial artifacts. This creates a feedback loop — dance movements create architecture that becomes part of the performance which in turn interacts with the dancer. [Huyghe] suggests an ideal wherein an array of metal manipulating robots would be able to keep up with the movements of the performer and create a unique, fluid, and dynamic experience. This opens up some seriously cool concepts for performance art.
Continue reading “The Unity of Dance and Architecture”
When a neighbor decided to cut down a walnut tree, [voluhar] decided to make something of the wood. The result was this custom keyboard that combines wood and metal in a lovely and functional package.
Walnut is a wood with a rich heritage in consumer electronics. Back in the early days of TV, huge console sets were built into solid walnut cabinets and proudly displayed along with the other fine furnishings in a home. [voluhar]’s keyboard captures a little of that spirit while retaining all the functionality you’d expect. From the custom PCB to the engraved aluminum key caps, it looks like every part was machined with a CNC router. The keyboard sports satisfyingly clicky Cherry MX switches, and a few cleverly positioned LEDs provide subtle feedback on the state of the locking keys. As for the imperfections in the walnut case, we think it just adds to the charm and warmth of the finished product, which would look great on any desktop.
Wood has appeared in a couple of custom keyboards that we’ve featured before, like this all-wood version. But if you want the retro look without the wood, you could always try a keyboard built out of a typewriter.
Continue reading “Walnut Windfall Winds up in Custom Keyboard”
Choosing between manually changing endmill bits on a CNC machine and investing in an expensive automated solution? Not for [Frank Herrmann], who invented the XATC, an eXtremely simple Automated Tool Changer. [Frank’s] ingenious hack achieves the same functionality as an industrial tool changer using only cheap standard hardware you might have lying around the workshop.
Like many ATCs, this one features a tool carousel. The carousel, which is not motorized, stores each milling bit in the center bore of a Gator Grip wrench tool. To change a tool, a fork wrench, actuated by an RC servo, blocks the spindle shaft, just like you would do it to manually change a tool. The machine then positions the current bit in an empty Gator Grip on the carousel and loosens the collet by performing a circular “magic move” around the carousel. This move utilizes the carousel as a wrench to unscrew the collet. A short reverse spin of the spindle takes care of the rest. It then picks another tool from the carousel and does the whole trick in reverse.
Thanks to Smoothieboard creator [Arthur Wolf], who is currently working on a similar project, for the tip!
[HomoFaciens] is always making us feel silly about our purchases. Did we really need to buy a nice set of stepper motors for that automation project? Couldn’t we have just used some epoxy and a threaded rod to make an encoder? Did we need to spend hours reading through the documentation for an industrial inkjet head? Couldn’t we just have asked ourselves, “What would [HomoFaciens] do?” and then made a jailhouse tattoo gun attached to a broken printer carriage and some other household tech trash?
In his continuing work for his Hackaday prize entry, which we have covered before, his latest is a ink (…drop? ) printer. We think the goal is a Gingery book for CNC. He begins to combine all his previous work into a complete assembly. The video, viewable after the break, starts by explaining the function of a salvaged printer carriage. A motor attached to a belt moves the carriage back and forth; the original linear encoder from the printer is used for positional feedback.
The base of the printer is a homemade y-carriage with another salvaged printer motor and encoder driving a threaded rod. The positional feedback for this axis is provided by a optical mouse gliding on a sheet of graph paper. The printer nozzle is a cup of ink with a solenoid actuated needle in it. When the needle moves in a hole at the bottom, it dispenses ink.
As always, [HomoFaciens] makes something that is the very definition of a hack. Commenters will have to go elsewhere to leave their favorite debasement.
Continue reading “[HomoFaciens] Shows Off With DIY Paper Printer”
The folks at Leeds Hackspace have built themselves a shiny new C-beam based CNC mill. As you might expect everyone wants to try the machine out, but there’s a problem. A CNC machine presents a steep learning curve, and a lot of raw materials (not to mention cutting bits) can be used in a very short time. Their solution is simple: mix themselves some machinable wax from LDPE pellets and paraffin wax, then easily recycle their swarf and failed objects back into fresh machinable wax stock.
Making the wax recipe is not for the faint-hearted, and involves melting the LDPE pellets and wax to 130 degrees Celcius in a cheap deep-fat fryer. They bought the cheapest fryer they could find at the British catalogue retailer Argos, you really wouldn’t want to risk an appliance you cared about in this exercise.
Colouring came from an orange wax crayon, though they note recycling of mixed colours will inevitably result in a muddy brown. The finished mixture was poured into Tupperware lunchboxes to set, and the resulting blocks were trimmed to square on a bandsaw. The Tupperware proved not to have a flat bottom, so later batches were cast in a loaf tin which proved much more suitable.
We’ve mentioned the machinable wax recipe before here at Hackaday, but it’s worth returning to the topic here with a description of it being used in the wild. Having watched other environments get through learning materials at an alarming rate with very little to show for their effort, we can see it makes a lot of sense as a training material.
[Fabian Chouteau] built a plotter out of CD-ROM parts. Yawn, you say? Besides being a beautiful physical build, this one has a twist. He wrote the software and firmware for the entire project himself, in Ada.
Ada is currently number two on our list of oddball programming languages that should be useful for embedded programming. It’s vaguely Pascal-y, but with some modern object-oriented twists. It was developed for safety-critical, real-time embedded systems (by the US Department of Defense), and is used in things like airplanes, rockets, and the French TGV trains. If that sounds like overkill for your projects, [Fabian]’s project shows that it’s still very tractable.
In his GitHub, he re-implements the GRBL G-code generator and then writes a GUI front-end for it. In his writeup, he mentions that the firmware and its simulator for the front-end use exactly the same code which is quite a nice trick, and guarantees no (firmware) surprises when moving from the modelled device to the real thing.
We looked quickly around for Ada resources and came up with: GNAT, the GNU Ada compiler, and its derivatives: GNAT for ARM (STM32-flavor), ARM-Ada (LPC21xx flavor), AVR-Ada, and MSP430-Ada.
Any of you out there use Ada in embedded work? We’d love to hear your thoughts.
Continue reading “Pen-Plotter Firmware Written Completely in Ada”