Late last year at a craft show, [hahabird] and a friend came across a laser-cut Spirograph and they both had a go at it. After mocking his friend’s lack of fine motor skills, [hahabird] was struck with the idea of making a giant-scale Spirograph that would (hopefully) be less frustrating for kids of all ages.
He generated the gears using an InkScape plugin, and then moved the project to Illustrator for adjustments. After nesting the inner gear drawings, he was able to print them out on one 3×3′ piece of paper at the local FedEx-Kinko’s. To make a template for routing he pieces that make up the eight-foot diameter outer ring, [hahabird] first cut it out of MDF and then bolted that to plywood. The outer ring’s size was dictated by the number of sections that fit on a 4×8 piece of plywood.
The challenge of the inner cogs was to make them move smoothly and still mesh with the teeth of the outer ring. [hahabird] solved this by mounting casters on raised platforms, which double nicely as handles. Each inner cog has a series of PVC couplers that take the 1″ PVC chalk holder insert.
So far, [hahabird] has cut 22-, 35-, and 44-tooth cogs, all of which are painted in nice, bright colors. According to his reddit comments, he will have a video or gif of it in a few days. We hope he makes the plus sign cog and the tongue depressor piece, too.
Here’s something that be of interest to anyone looking to hack up a router for their own connected project or IoT implementation: hardware based on a fairly standard router, loaded up with OpenWRT, with a ton of I/O to connect to anything.
It’s called the DPT Board, and it’s basically an hugely improved version of the off-the-shelf routers you can pick up through the usual channels. On board are 20 GPIOs, USB host, 16MB Flash, 64MB RAM, two Ethernet ports, on-board 802.11n and a USB host port. This small system on board is pre-installed with OpenWRT, making it relatively easy to connect this small router-like device to LED strips, sensors, or whatever other project you have in mind.
The board was designed by [Daan Pape], and he’s also working on something he calls breakoutserver There’s a uHTTP server written specifically for the board that allows any Internet connected device to control everything on the board. There’s also an HTML5 app they’re developing which could be pretty interesting.
All in all, it’s a pretty cool little device that fits nicely in between the relatively simplistic ‘Arduino with an Ethernet shield’ and a Raspi or BeagleBone.
The Electronic Frontier Foundation have released an alpha of their own Open Wireless Router Firmware as part of the Open Wireless Movement. This project aims to make it easier to share your wireless network with others, while maintaining security and prioritization of traffic.
We’ve seen a lot of hacks based on alternative router firmware, such as this standalone web radio. The EFF have based their router firmware off of CeroWRT, one of the many open source firmware options out there. At this time, the firmware package only targets the Netgear WNDR3800.
Many routers out there have guest modes, but they are quite limited and often have serious vulnerabilities. If you’re interested in sharing your wireless network, this firmware will help out by letting you share a specified amount of bandwidth. It also aims to have a secure web interface, and secure auto-update using Tor.
The EFF has announced this “pre-alpha hacker release” as a call for hackers who want to join in the fun. Development is happening over on Github, where you’ll find all of the source and issues.
[CNLohr] is no stranger to running Minecraft on some weird hardware. Earlier, he built this Linux powered microscope slide… thing to toggle LEDs with redstone levers in Minecraft. Figuring if Minecraft could run on an AVR, he decided to try the same thing on a router, a TP-LINK TL-WR841N to be specific. Like the microscope slide running Linux, this proved to be an easy task. [CNLohr] had another router he could run Minecraft on, and this one could also punch wood. There really was only one thing for him to do.
Like the microscope slide and the wireless router, [CNLohr]’s CNC router is now running a Minecraft server. The phrase, “because it’s there” comes to mind. When connected to the CNC server, the player controls a snow golem (a snowman with a jack ‘o lantern head) with a carrot. Wherever the snow golem goes, the tool head follows, allowing him to carve objects in the world, and on a sheet of MDF secured in the CNC machine.
It’s certainly an odd build, but [CNLohr] was able to carve out a pixeley, blocky Hackaday logo with the snow golem controlled CNC machine. Code here, video below.
Continue reading “Running Minecraft On Two Routers”
With tiny Linux boards popping up like dandelions, it was only a matter of time before someone came out with a really tiny Linux board. This is it. It’s a tiny board less than an inch on each side with an 802.11n System on Chip running OpenWrt on Linux. The best part? You can pick one up for $20 USD.
The VoCore isn’t so much as a cut down ARM dev board as it is a cut down router capable of running OpenWrt. It’s not a power house by any means with 8MB of Flash, 32MB of SDRAM, and a 360MHz CPU, but if you ever need something that’s less than an inch square, you probably don’t need that much power.
The VoCore features interfaces for 100M Ethernet, USB host and device, UART, SPI, I2C, I2S, and 20 GPIOs for blinking LEDs and listening to sensors. There’s also a dock that breaks out the Ethernet and USB ports, available as a kit or already assembled.
It’s a pretty cool device, and with low current draw (about 200mA) and being able to accept +5V power, we can easily see this tiny board popping up in a few projects.
There were so many things to see at Maker Faire that the booths spilled out of the buildings and into various tents on the grounds. One of the most interesting tents was packed with tables showing off CNC machines and that’s where we ran into two that are familiar, and still amazing.
First up is the handheld CNC router which we saw all the way back in 2012. It’s a spectacular piece of tech that adds a base to a handheld router. The base gives the tool a touchscreen system, the ability to precisely track it’s location, and adjustment motors to move the cutting bit in order to correct for imperfections in operator movements. It’s really amazing and we are happy to see they have formed a company called Taktia around the concept and are heading for crowd funding soon.
The second half of the video shows off the Nomad CNC mill which we covered at the end of April. Carbide 3D had a hugely successful (more than 10x the goal) Kickstarter that they tried to blame on the support of Hackaday readers. It’s a no-brainer that this machine is the one to watch, as even our hacked camera work doesn’t lose the fact that it can produce rock-solid results.
While cheap hobby CNC mills and routers are great machines that allow you to build things a 3D printer just can’t handle, they do have their limitations. They’re usually powered by a Dremel or other rotary tool, so speed control of the spindle via Gcode is nigh impossible. They’re also usually built with a piece of plywood as the bed – cheap, but not high on repeatability. The Nomad CNC mill fixes these problems, and manages to look good and be pretty cheap, to boot.
Instead of using a Dremel or other rotary tool to cut materials, the Nomad team is using a brushless DC motor connected to a real spindle. With a few certain motors, this allows for closed loop control of the spindle; Sending S4000 Gcode to the mill will spin the spindle at 4000 RPM, and S6000 runs the spindle at 6000 RPM, whether it’s going through foam or aluminum. This is something you just can’t do with the Dremel or DeWalt rotary tools found in most desktop mills and routers.
Along with a proper spindle, the Nomad also features homing switches, a tool length probe, and a few included fixtures that make two-sided machining – the kind you need it you’re going to machine a two-layer PCB – possible, and pretty simple, too. The softwares controlling the mill are Carbide Motion and MeshCAM, a pretty popular and well put together CNC controller. Of course the mill itself speaks Gcode, so it will work with open source CNC software.
It’s all a very slick and well put together package. Below you can find a video of the Nomad milling out a Hackaday logo.
Continue reading “Finally, A Desktop CNC Machine With A Real Spindle”