Unitree Robotics, well known for providing affordable legged robots along with questionable Star Wars–themed promotional videos, has announced a brand-new, custom-made, 6-degree-of-freedom robotic arm intended to be mounted on the back of its larger quadrupeds. Also, it will save humanity from Sith from Mars, or something.

This, we should point out, is not the first time Unitree has used the Force in a promotional video, although its first attempt was very Dark Side and the second attempt seemed to be mostly an apology for the first. The most recent video here seems to have landed squarely on the Light Side, which is good, but I’m kinda confused about the suggestion that the baddies come from Mars (?) and most humans are killed (??) and the answer is some sort of “Super AI” (???). I guess Unitree will have to release more products so that we can learn how this story ends.

Anyway, about the arm: There are two versions, the Z1 Air and the Z1 Pro, built with custom motors using harmonic reducers for low backlash and torque control. They are almost exactly the same, except that the Pro weighs 4.3 kilograms rather than 4.1 kg, and has a payload of 3–5 kg rather than 2 kg. Max reach is 0.7 meters, with 0.1 millimeter repeatability. The price for the Air version is “about $6600,” and it’s compatible with “other mobile robots” as well.

It’s important to note that just having an arm on a robot is arguably the easy part—it’s using the arm that’s the hard part, in the sense that you have to program it to do what you need it to do. A strong, lightweight, and well-integrated arm certainly makes that job easier, but it remains to be seen what will be involved in getting the arm to do useful stuff. I don’t want to draw too many comparisons to Boston Dynamics here, but Spot’s arm comes with autonomous and semi-autonomous behaviors built-in, allowing otherwise complex actions to be leveraged by commercial end users. It’s not yet clear how Unitree is handling this.

We’re at the point now with robots in general that in many cases, software is the differentiator rather than hardware, and you get what you pay for. That said, sometimes what you want or need is a more affordable system to work with, and remember that Unitree’s AlienGo costs under $10K. There’s certainly a demand for affordable hardware, and while it may not be ready to be dropped into commercial applications just yet, it’s good to see options like these on the market.

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How Robots Can Help Us Act and Feel Younger

Toyota’s Gill Pratt on enhancing independence in old age

10 min read
An illustration of a woman making a salad with robotic arms around her holding vegetables and other salad ingredients.
Dan Page

By 2050, the global population aged 65 or more will be nearly double what it is today. The number of people over the age of 80 will triple, approaching half a billion. Supporting an aging population is a worldwide concern, but this demographic shift is especially pronounced in Japan, where more than a third of Japanese will be 65 or older by midcentury.

Toyota Research Institute (TRI), which was established by Toyota Motor Corp. in 2015 to explore autonomous cars, robotics, and “human amplification technologies,” has also been focusing a significant portion of its research on ways to help older people maintain their health, happiness, and independence as long as possible. While an important goal in itself, improving self-sufficiency for the elderly also reduces the amount of support they need from society more broadly. And without technological help, sustaining this population in an effective and dignified manner will grow increasingly difficult—first in Japan, but globally soon after.

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