THP Semifinalist: Stubby, the Adorable Hexapod

 

hexy

After talking with a few of the judges for The Hackaday Prize, documentation will be a large factor in determining who wins and takes a trip to space, and who is left with their feet safely planted on the ground. Stubby the Hexapod is one of the most well documented projects in the running. There are already two hardware revisions for the walking mechanism, several board layouts for the controller, and more project log entries than you can shake a stick at.

Stubby is the brainchild of [The Big One] (a.k.a. [Wyatt] with [Warren], [Princess Sparkle], and [exot] filling out the rest of the team). The project originally began as an educational robotics project meant for teaching [Wyatt]‘s kids the ins and outs of robotics and electronics. He’s doing this by developing an open source hexapod robot platform, complete with a frame, electronics board, and a lot of interesting code driving 18 hobby servos.

The frame for Stubby’s first hardware revision is rather interesting; it’s able to be reproduced with nothing more than a scroll saw. The latest revision is a complete rethinking of hexapod locomotion using 2DOF legs and a more mechanical gait.

Being completely open source and very well documented, you can already make your own Stubby hexapod with a scroll saw and the files on [Wyatt]‘s site. If 3D printing is more your thing, there’s also a few files to help you with that.

You can check out a few videos of the different Stubby revisions below:


SpaceWrencherThe project featured in this post is a semifinalist in The Hackaday Prize.

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Stubby, The Adorable And Easy To Build Hexapod

stubby

A while back, we had a sci-fi contest on Hackaday.io. Inspired by the replicators in Stargate SG-1, [The Big One] and a few other folk decided a remote-controlled hexapod would be a great build. The contest is long over, but that doesn’t mean development stopped. Now Stubby, the replicator-inspired hexapod is complete and he looks awesome.

The first two versions suffered from underpowered servos and complex mechanics. Third time’s the charm, and version three is a lightweight robot with pretty simple mechanics able to translate and rotate along the XYZ axes. Stubby only weights about 600 grams, batteries included, so he’s surprisingly nimble as well.

The frame of the hexapod is designed to be cut with a scroll saw, much to the chagrin of anyone without a CNC machine. There are three 9g servos per leg, all controlled with a custom board featuring an ATMega1284p and an XBee interface to an old Playstation controller.

Video of Stubby below, and of course all the sources and files are available on the project site.

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HexDrake — A Low Cost 2-DOF Hexapod

hexdrake low cost hexapod

[David's] been making robots since he was 16. After conquering the basics, he wanted to build something a bit more interesting than a simple wheeled-robot — he wanted to buy a hexapod but they were too expensive — so he decided to design his own low-cost version!

It’s made out of hand-cut wood, SG90 servos, an Arduino and a 16-channel servo controller. A 2.4GHz remote control sends commands to the Arduino which then communicates to the USC servo controller, allowing for intricate control of the 14 servos that make up the HexDrake.

He’s also added a few LED arrays for the eyes of his robot, which in the future will be animated to give expression to his little hexapod.

It’s an extremely well built little bot, and [David's] made a very in-depth Instructable for anyone who would like to follow in his footsteps. Stick around after the break to see it scurry around!

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Sci-Fi Contest Roundup: Science Nonfiction

Yep, we have a Sci-Fi contest on our hands, with a week to go until entries are due. There are amazing prizes for the best Sci-Fi build, but in the spirit of the Internet, a few teams have elected to put together a science nonfiction project. We won’t hold that against them, because these builds are really, really cool.

Rockin’ bogie, man

rockerFirst up in the ‘real life science fiction’ category is an adorable little rocker bogie robot designed and built by a team at MADspace, the Eindhoven Hackerspace.

A rocker bogie suspension is rather unique in that it can be used to drive over obstacles twice the size of the wheels, has a zero turning radius, and is found on every rover that has ever gone to Mars. The suspension system has articulated rockers on each side of the chassis , with pivoting wheels at each of the four corners of the robot. While this type of suspension can’t go very fast, it can go just about anywhere.

The team loaded up their bot with a Raspberry Pi, a pair of webcams, 20Ah of batteries, gyro, and a web interface. The suspension works beautifully, and most of the parts are 3D printable. Very cool. There’s a pair of videos with this bot in action below.

Spider bot. Just add two more legs.

Hex

Continuing on with the science nonfiction theme of this post is a cute little hexapod walker reminiscent of designs that have been proposed to visit the moon and asteroids.

This is a rather unique hexapod, controlled entirely with 12 PWM channels on an ATMega1284. Although each leg only has two degrees of freedom (the software has support for 3 DOF, though) the movement is surprisingly smooth. It’s an inexpensive build, too, with 5 gram servos providing all the power to the legs. Video below.

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Hexapod Robot Terrifies Humans and Wallets

hexapod

[Kevin] brings us Golem, his latest robot project. Golem is crafted not of clay and stone like his namesake, but of T6 Aluminum and Servos. We don’t have a banana for scale, but Golem is big. Not [Jamie Mantzel's] Giant Robot Project big, but at 2.5 feet (76.2 cm) in diameter and 16 lbs (7.3 Kg), no one is going to call Golem a lightweight. With that kind of mass, standard R/C servos don’t stand much of a chance. [Kevin] pulled out all the stops and picked up Dynamixel MX64 servos for Golem’s legs. Those servos alone propelled the Golem’s costs well beyond the budget of the average hobbyist. Kevin wasn’t done though. He added an Intel NUC motherboard with a fourth generation i5 processor, a 120 Gigabyte solid state drive, and 8 Gigbytes of Ram.  Sensing is handled by gyros, accelerometers, and an on-board compass module. We’re assuming from the lack of a GPS that Golem will mainly see indoor use. We definitely like the mini subwoofer mounted on Golem’s back. Hey, even robots gotta have their tunes.

Golem is currently walking under human control via a Dualshock 3 controller paired via bluetooth. [Kevin's] goal is to use Golem to learn Robotic Operating System (ROS). He’s already installed ubuntu 13.04 and is ready to go. [Kevin] didn’t mention a vision system, but based on the fact that some of his other robots use the Xtion pro live, we’re hopeful. We can’t wait to see Golem’s first autonomous steps.

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Stompy, the 18-foot, 2-ton hexapod is ready for production

Stampy

Over at the Artisan’s Asylum hackerspace in Somerville, MA, something terrifically awesome is happening. They’re building an 18-foot diameter, 2-ton ridable hexapod that can walk over a car. It’s called Project Hexapod and they need your help.

Over the last year or so, the team behind Project Hexapod has developed an amazingly inexpensive hydraulic control system for each of the six legs and created a 1:1 model of the leg fastened to a wheeled cart to get the kinematics down pat. Now, with thousands of pounds of steel already watercut for the legs, they’re turning to the community for a little help with the welding.

The Project Hexapod team estimates they have about 1100 hours of welding time in front of them. They’re looking for a few people around the Boston area that are familiar with steel fabrication and are willing to work on a two-ton robot that can walk over a Volkswagen Beetle.

The guys have put up a little application form if you meet those basic requirements. You can also check out their Facebook page for any announcements and a whole lot of pictures.

Six years, a giant robot, and a kickstarter

robot

Since 2007, [Jamie Mantzel] has been building a huge remote-controlled walking robot. If you’ve been following him on his YouTube channel and blog, you’ve seen the very beginnings of him building a lumber mill to create a workshop, making the legs for his robot, and improving his welding rig. This week, though, has been very special. [Jamie] has finally finished his giant robot project, bidding closed the fevered dream of a madman who awakes to a 10 foot robot in his yard.

The giant robot is constructed nearly entirely out of scrap aluminum. In the interest of simplicity, [Jamie] has come up with some interesting techniques to scale up conventional RC gear to power huge motors swinging giant legs: the steering motors are powered by manual switches, but these switches are activated by servos. A brilliantly simple solution to driving high-current loads if we do say so ourselves.

[Jamie]‘s robot has garnered a lot of attention over the years, so much so that toy companies have licensed his designs for a line of battling combat spiderbots. [Jamie] believes his robots should be more educational, so he’s launched a Kickstarter for his own version as a kit. With this kit, getting the bug tank robot up and running isn’t simply a matter of pulling it out of the box and installing batteries; [Jamie]‘s version is an actual kit with linkages that must be assembled. We know which version we’d want.

It’s an amazingly impressive project, and we’re glad to see such an awesome cat has finally realized his dream of a walking aluminum arachnid of death.

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