For some reason, we seem to really want our robots to walk on two legs like we do. And this despite how much the robots themselves want to be made out of motors, which match up so naturally with wheels. The result is a proliferation of inventive walking mechanisms. Here’s another.
Gyroman is a 3D printed gyroscope with legs. The gyroscope is geared down to lift one leg and then the other. First-semester physics, that we still find a little bit magical, makes the gyro precess and the robot turns a bit. Time these just right and it walks. See the video below for a demo. (Admittedly, Gyroman looks like he’s had a bit too much to drink as he winds down.)
Continue reading “Gyroman Walks with Just One Motor”
The world has a severe lack of robots, and the shortage of walking robots is untenable. We were promised flying cars and fusion reactors, yet here we are, 15 years into the twenty-first century without even a robotic pet spider.
[Radomir]’s entry for The Hackaday Prize aims to fix this bizarre oversight of scientific and technological progress. He’s designed a small, inexpensive, but very well designed quadrupod robot that will put full reverse kinematics on your desk for under $50.
To solve humanity’s glaring lack of walking robots, [Radomir] designed Tote, a four-legged robot whose chassis is mostly composed of only 9 gram servos. There are twelve servos in total, three on each of its four legs. It’s an extension of his earlier µKubik robot. While the µKubik was powered by Python, the Tote is all Arduinofied, calculating the trajectories of each leg dozens of times a second with an Arduino Pro Mini.
This isn’t the only walking robot kit on hackaday.io; last year, [The Big One] created Stubby the Teaching Hexapod. Even though Stubby featured six legs, it’s still remarkably similar to Tote; 9 gram servos provide all the locomotion, and all the software is running on a relatively small ATMega microcontroller. Both are great introductions to walking robots, and both bots will surely be capable and just rulers of mankind after the robot apocalypse.
[Alex] posted up build details of his robot, Halfbot, on Tinkerlog. We’ve been big fans of his work ever since his Synchronizing Fireflies Instructable way back in the day. [Alex’s] work usually combines an unconventional idea with minimalistic design and precise execution, and Halfbot is no exception.
You’ll have to watch the video (embedded below the break) to fully appreciate the way it moves. The two big front legs alternate with the small front pads to make an always-stable tripod with the caster wheel at the back. It lifts itself up, moves a bit forward, and then rests itself down on the pads again while the legs get in position for the next step. It’s not going to win any speed tournaments, but it’s a great-looking gait.
The head unit also has two degrees of freedom, allowing it to scan around with its ultrasonic rangefinder unit, and adding a bit more personality to the whole affair.
[Alex] mentions that he’d recently gotten a lathe and then a CNC mill. So it’s no surprise that he made all the parts from scratch just to give the machines a workout. We think he did a great job with the overall aesthetics, and in particular the battery pack.
We’re excited to see how [Alex] adds new behaviors as he develops the firmware. No pressure!
Continue reading “The Halfbug”
There’s just something about the idea of robots turning into everyday objects that fascinates us all. It seems Japan outdoes the world in that category, and the J-Deite project is no exception. J-Deite Quarter is the first transforming robot to come from the collaborative project between [Kenji Ishida] of Brave Robotics, [Watur Yoshizaki] of Asratec Corp., and Tomy Co. Ltd. If Brave Robotics sounds familiar, that’s because this isn’t the first transforming robot [Kenji Ishida] has produced, nor the first featured on Hackaday.
The J-Deite Quarter weighs 77lbs (35kg) and can run for an hour on a single battery charge. It’s joints are powered by Futaba servos. It is controlled by the proprietary V-SIDO OS designed by [Watur Yoshizaki]. As a robot, it stands at 4.25 feet (1.3m). It walks at a rather slow speed of 0.6mph (1km/hr). It has several points of articulation; it can bend its arms and flex its fingers. In less than 30 seconds, the robot transforms into an equally long two-seat sports car with a maximum speed of just over 6mph (10km/hr). Overall, the J-Deite Quarter is no speed demon, but it is noteworthy for being functional in both forms.
The web site has a cute backstory featuring a green meteorite that allows the “real” J-Deiter to communicate with the developers trying to create a robot in its image. Along with the video, it resembles a marketing ploy for a toy, which could explain Tomy’s involvement. After all, Tomy, along with Hasbro, developed the original Transformers toy line. Unfortunately, the J-Deiter Quarter is just a prototype, with no plans for mass production at this time. Instead, the project’s focus is on making a bigger and better J-Deiter. There are plans for a J-Deiter Half (8-foot-tall) to be developed by 2016, with the final goal of creating a 16-foot-tall transforming robot by 2020.
Enjoy the video that shows what J-Deite Quarter is capable of (with added sound effects, of course) after the break. Now, if you’ll excuse me, I have a sudden hankering to watch some Transformers and Voltron cartoons.
Continue reading “Meet J-Deite Quarter, the 4-Foot-Tall Transformer”
We’ve all seen videos of those crazy Boston Dynamics running quadruped robots that can reach up to 28 mph. Those things are amazing and it’s almost impossible to imagine how to even start building one. [Max] loves his robots and wanted to build a quadruped but, being a robot hobbyist, didn’t have the serious cash needed to make an extravagant robot like those of Boston Dynamics. Instead he started bridging the gap by designing a quadruped robot that is a little bit slower and tons cheaper.
[Max] designed all of the mechanical parts himself. After weighing the advantages and disadvantages of different materials, he decided that the frame would be made from 5mm acrylic sheet. The main body of the robot has acrylic ribs that are spaced apart by threaded rods. Twelve RC servos make up all of the joints, 3 in each leg. Notice in this photo how there is one servo that immediately rotates another servo. To support the other side of the rotating servo, [Max] epoxied on a T-nut, stuck in a short length of threaded rod which is then supported in the frame by a ball bearing. Simple and effective! The upper portions of the legs are also made from acrylic sheet and the lower legs are from a cheap camera tripod. Rubber feet ensure a slip resistant stance.
All of the servos are controlled by an Arduino Mega. [Max] is currently writing a sketch that will perform the complex math and determine coordinated servo motions for movements us humans take for granted, like ‘walk forward’. As you can see in the videos, [Max’s] robot won’t be catching the Boston Dynamics’ Cheetah any time soon but he is off to a great start.
Future plans for this project include bluetooth control and integrating the ultrasonic sensor proactively installed in the ‘head’ of the robot. Check out the videos after the break. [Max] is looking for some feedback on his project. We here at HaD think this needs a great name. Let’s hear some suggestions in the comments…
Continue reading “Baby Quadruped Robot, Learning To Walk”
Here’s a really cool application of 3D printing and robotics by a fellow named [Maundy] – He’s created a very unique kinetic robot which relies on gravity to walk around.
All the electronics are housed in the cylinder as shown above. It can roll freely back and forth by some kind of mechanism inside (not shown), but the beauty of it is, when the cylinder rolls to one end, gravity takes over and the little robot actually flips through the air, reorienting itself onto its other feet.
Due to the flipping nature of the bot, it can even climb over small obstacles with ease – but this one can’t steer, so there’s no threat of them taking over the world. Perhaps with a modification to the control cylinder (turn it into a ball), the robot could orientate itself vertically, and then kind of spin in place in order to steer…
Anyway, you have to see it to believe it, so stick around after the break to see it in action!
Continue reading “A New Approach to Robotic Walking Looks More Like Kinetic Art”
[Ye Guan] has always been fascinated by walking robots — so he decided to build his own. It’s called Project Sentinel, and he’s loosely based the design off of the Sentinel Walker from Warhammer 40K, and the two-legged AT-AT walker from Star Wars.
Both of these robots are based off of a bird’s walking style. Scientifically this is called the digitgrade walking style, which means they stand and walk on their digits (toes) — this typically allows them to move more quickly and quietly than most other animals.
[Ye] has managed to achieve this for his project using 8 servo motors, balancing the center of mass directly above the feet. Think about it like a reverse pendulum, which is supported by the servos torque and balanced by a gyroscope. He plans to have it fully autonomous with sensor feedback.
It’s not done yet, but he’s already released all the CAD files and a nice build log for anyone to attempt it themselves — we’re excited to see the final product. Just take a look at it walking in place after the break!
Continue reading “Project Sentinel — A Bipedal Walking Robot”