Although not the biggest hexapod walker we’ve seen by any means, this one is nonetheless worth a mention. Made with windshield wiper motors, PVC pipe, and lots of wood, it’s still a good size ‘bot. It’s a work in progress, but check out the video of it’s legs being tested as well as one of it’s preliminary assembly after the break.
Control is similar to this little hexapod that we’ve featured before in the the front and back legs are driven by a motor and linked together using threaded rod. In this case though, the rod is 1/4 – 20, much larger than the 4-40 rod used by it’s little predecessor. Also unlike little PegLeg, the middle legs are independently actuated, not linked together. This should allow for some different modes of locomotion.
Different modes of locomotion, that is, if it’s able to walk. Although able to pick itself up, the middle legs are barely strong enough to support the large battery and powerful, but heavy, automotive motors. This is an introductory post to this project, and everything will hopefully be worked out and explained in time. Be sure to check back and see how this robot progresses, and the details of the different elements of this ‘bot. Continue reading “A Large Hexapod Made of Wood and PVC Pipe”
It’s hard to be an expert at everything, but this collection of wood joinery techniques will make your next project look like you’ve just finished your degree in mechanical engineering. They’re targeted for use in projects where thin sheets of plywood are CNC cut to make enclosures and parts. [Sean Ragan] mentions that these are not new, but we haven’t come across such a large collection of examples as this.
The joints shown above address a series of different needs. You’re probably already familiar with the joint on the bottom right which makes nice corners for a box, providing a lot of surface area for gluing. But just above that is a simple variation on the idea which includes slots for square nuts. This type of mechanical fastener brings strength while keeping the option to take the joint apart again
To the top left you can see a design that includes a snap lock. As the two pieces are slotted together, the barbs flex until they find their mating openings and hold the pieces firmly together. Below that are some bulbed finger joints which don’t need glue to hold themselves together.
[Sean’s] post goes on and on with these designs. He even covers the laser-cut bendable hinges which we are quite fond of.
[Johan von Konow] wanted to make something special as a wedding gift to his wife. He decided a pair of interlocking miniature rings would be the perfect keepsake. He started his search for a way to mill the wooden rings from a solid piece of wood, and documented his journey for our enjoyment.
This project poses an interesting challenge. Most CNC mills offer three axes of freedom, but he only had a 2D mill meant for routing PCBs. This means the cuts can only be made from the top down at one depth. In order to fabricate the rings he needed to cut from more than one side. With more study, [Johan] discovered that it would be necessary to cut the wood stock from eight different angles before the rings would be complete.
The solution to the problem was to first mill a jig to hold the wood stock. It has positions to hold the stock at each different angle. The final step before starting the cut was to mill the stock itself to perfectly fit his custom jig. We think it turned out great, thanks in part to hand filing, sanding, and polishing to smooth the marks left from milling.
Here’s a project that’s hard to categorize. It generates electricity by burning wood. The diamond-plate wrapped column to the right is a magazine that stores the wood, which is gravity fed as pieces below are consumed. The heat is used to drive a power turbine which is responsible for generating the electricity.
This begs the question, is this a sustainability hack? From one perspective it’s burning renewable biomass. Right now that’s wood, but it could be compressed blocks of grasses or wood manufacturing byproducts. So in this sense it is sustainable. Unfortunately it still doesn’t solve the problem of carbon emissions.
The build log for the project is both image and video heavy. You can see the initial prototypes which are not self-feeding, but burn so hot that there’s a nice pink glow to the entire assembly. But by the time they get to the final prototype it’s running much more efficiently, and can put out a peak of over 100 amps!
[Frank] sent in a link to this fantastic wooden clock. The design was dreamed up by [Clayton Boyer] and he’s got full-sized templates for sale on his site. We’ve marveled at his creations in the past, having featured his useless machine that was made from wooden gears. This “Bird of Paradise” clock steps up the complexity quite a bit, creating a timepiece without a case to show off the beauty of all of those teeth.
We wondered what goes into building one of these yourself. From the FAQ page it seems you could get by with a scroll saw, drill press, Dremel, and sander. That’s the medium-tech method, but you could opt to scan the plans in order to laser cut your parts, or just use hand tools. But in addition to building tips, there’s advice on how to fine tune clocks that don’t want to keep running, thoughts on finishing the wood parts, sanding, tweaking the teeth, and much more. It’s no secret we have a love for digital clock projects, but there’s something very seductive about a design like this that uses no electricity. Don’t miss the clip after the break to see what we mean.
Continue reading “Do you have what it takes to make lumber keep time?”
Behold the wooden machine (translated) that is used for… well it does… it was built because… Okay, this is a case where asking what it does or why it was built is the wrong question. [Erich Schatt] began building the piece that he calls “Wheels” back in 1995. It took just seven years to complete, and is made entirely of wood. The video after the break shows a multitude of moving parts.
The chains were modeled after bicycle chains, which are used to transfer motion from the “rider” throughout the machine. The gearing for each segment was meticulously calculated, then perfected through trial and error. The complexity even calls for a differential and universal joints. It’s mesmerizing to watch and for that reason it’s made appearances at conventions and been featured in art exhibitions.
It’s also worth mentioning that this comes from a very humble-looking shop. [Erich] posted some pictures of his studio and aside from the abundance of bar clamps, it’s just your average garage or basement setup.
Continue reading “Wooden machine belongs in Willy Wonka’s factory”
Feeling pretty good after putting together your brand new standing computer desk? Step aside please, [Kagen Schaefer] has something he’d like to show you.
His Pipe Organ Desk is undoubtedly one of the coolest pieces of furniture we have seen in a long time. The project took [Kagen] over three years to complete, which sounds about right once you see how much attention was put into every last detail.
This desk is amazing in several ways. First off, the entire desk was constructed solely from wood. The drawers, the supports, knobs, screws, and even the air valves – all wood. Secondly, when one of the desk’s drawers are pushed in, air is directed to the organ pipes at the front of the desk, which plays a note.
A small portion of the air is also directed into the desk’s pneumatic logic board, which keeps track of each note that has been played. When someone manages to play the correct tune, a secret compartment is unlocked. The pneumatic logic board is an unbelievable creation, consisting of well over 100 wooden screws which can be tuned to recognize any number of “secret tunes”.
Sure a well-placed axe can open the compartment too, but who would destroy such a fine piece of work?