A Hexapod Robot Made from Scrap

radial-robot

Many if not most good hacks come from scrap or unused parts, but this hexapod robot takes it to a new level. [Helmut] wrote in to tell us about his ‘bot built from discarded electronics. As with most of the little walkers that we’ve featured here, this robot features some basic obstacle avoidance with a sensor array on the head unit.

The way the head controls this robot is really the interesting thing about this setup.Rather than send a signal to tell servo motors to walk in a certain gait, the head physically tilts in the direction that it should go. Although it’s somewhat hard to tell, it appears that a driving motor in the head assembly pushes a sort of camshaft down into the body. This is then mechanically coupled to the legs causing it to walk in the correct direction.

Be sure to check out the videos after the break, featuring narration by a computer in English, or by a human in German if you happen to sprechen sie Deutsch. [Read more...]

Steam-powered hexapod

This all-mechanical hexapod (translated) was meticulously planned and beautifully constructed. It’s not craning its neck to see what’s ahead. That’s a smoke stack for the steam engine which propels the machine.

Mechanically the legs were the hardest part. That’s only because the steam engine was not built from scratch. It’s a Wilesco D14 which is powered by solid fuel tablets. It puts out high RPM but low power so the gear ratio was set at 286:1 to make the most of its output.

The legs themselves are made of brass rods. These are anchored on one side of a larger gear, with a pivot point that allows the leg to slide vertically. The result is best seen in the clip after the break. As the drive wheel rotates, the pivot point moves the body forward until the foot is lifted by the sliding motion of the rod. It ends up looking more elegant than some of the more dexterous hexapods, but it lacks the ability to turn.

[Read more...]

A Large Hexapod Made of Wood and PVC Pipe

pvc hexapod rc tests with Evie the dog

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. [Read more...]

MakerFaire K.C.: Hexy, the $200 hexapod project

I’ve always loved hexapods. Unfortunately, the cost to play with them can be rather daunting. Hexy is seeking to make a decent impact on that by being only $200. Yep, that $200 includes everything but the computer. You get the entire chassis, micro controller, servos, sensors, batteries, etc.

I ran into [Joe] from arcbotics showing off a hexy at the maker faire and had a few moments to check it out. He showed off some slick motion and explained some future upgrades. It looks like they are intending to go to metal gears in the commercial version which might push the cost to around $250. At this cost, this robot is comparable to the Lego NXT systems.

[Read more...]

Cheap wooden hexapod frame greatly reduces cost

[Balline] really wanted to play with a hexapod but found the cost to be prohibitive. Being a mechanical engineer, he was able to fairly quickly come up with a stable 3 servo design that would allow him to experiment with the platform. He chose to use wood as the construction material to help reduce costs even more.  As you can see in the video after the break, his design gets around fairly well.  His cost for the whole thing, including the 3 servos, the basic stamp hobby board, the recycled batteries, and the frame, was under $100.

This is a great system to start with, though he unfairly compares the cost to the dancing ones he had seen in the past. C’mon, your bot ain’t no [Lou Vega]. It is still pretty cool though.

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[Jaimie's] Giant Hexapod project

Warning, this may be a duplicate post. We all agree we’ve seen this before, but can’t find it in our archive. If it is, sorry. If it isn’t enjoy one of the most awesome projects we’ve seen in a long time.

Meet [Jaimie Mantzel] an eccentric, and very hyper, individual. He’s done many projects, but this one in particular stands out as being quite ambitious. [Jaimie] is building a giant hexapodal walker that he can ride in. Dubbed simply “Giant Robot”, the 12 foot tall and 18 foot wide robot began construction in 2007. This individual is so full of energy, you’ll get tired just watching his videos. We’ve included, below, his introduction video as well as the video where his giant robot takes its first steps. Note that there are 67 videos of the build process. Unfortunately, as of the last video in January 2011, the robot is unfinished.

Don’t worry though, we know [Jaimie] is still alive. We saw him recently coming up with cool toy ideas.

If this has left you with an insatiable craving for a video of a fully functional giant walking hexapod octopod, don’t forget about mondo spider.

[Thanks Kamil]

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Cardboard hexapod gets around with three motors

Here’s a lesson in doing a lot with very little. [Oldrobot] built this hexapod using cardboard for most of the pieces. He still had the box from his vacuum clear and it just happened to have a large black area the makes the top of the beetle look like it’s been painted.

The control board is from an old radio controlled airplane. Since RC airplanes used servos for flight control, it was a snap to hook up the three that make the bug go. One controls the set of middle legs which lift the body and change which of the propulsion legs are in contact with the ground. The other two servers move pairs of the front or back legs. It uses the same concept as this other RC controller hexapod, but much less time went into crafting the chassis and legs.

As you can see in the video after the break, the control scheme isn’t the most intuitive. But once you get a hang of which stick orientation affects each leg movement the bot ends up having fairly precise steering.

[Read more...]