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Feature Scaleable-packaging-setups-from-Universal-Robots-showing-at-PACK-EXPO-2017.jpg Universal Robots

Building a Better Robot

Universal Robots explains how to create an effective robot, from the materials and components to the software and user groups.

The goal of Universal Robots (UR) is to build easy-to-use robot arms that can be deployed by companies and organizations of all sizes. UR’s robots are often called collaborative robots or cobots. The goal of these machines is to integrate into human-based manufacturing. These cobots are designed for flexibility and financial return.

One of the big departures from traditional robots is that cobots do not have to be caged, and they don’t require original programming. They are designed for configuration rather than programming, so workers with a basic understanding of manufacturing can set them up for production.

Universal RobotsScaleable-packaging-setups-from-Universal-Robots-showing-at-PACK-EXPO-2017.jpg

Here’s an example of a packaging application that’s running cobots.

The company opened in 2005 and delivered its first robot arm in 2008. The first arm was roughly the size of a human arm and was able to carry the equivalent payload as a human arm. Since then, UR has introduced cobots that carry significantly greater payloads.

Design News reached out to UR to find out how they create robots. Anders Beck, head of innovation at UR, explained what it takes to build a better robot.


DN: How are materials selected for building a robot? What considerations are involved?

Anders Beck: In building robots, we’re at the point where we stretch the material very far. The robots look really small, but the base has the torque of an automobile in a compact structure. So, the materials have to be very strong. We keep ourselves up today on composites, aluminum. We also keep up with different manufacturing processes of the materials to see if there are new materials that can give us better strength. The mass is required for the torque needs to be significant. As well as carrying itself, the robot has to carry the payload.

DN: Are robots reverse-engineered to accomplish the users’ needs?

Anders Beck: For traditional robots, they are reverse-engineered if it welds. But the concept of UR is producing a universal robot. The first one was launched with an 850mm arm, the same as a human arm. It was designed to move the same space as human harm and a 5-kilo payload like a human arm. We wanted to empower the robot to do what the human does, only more demanding.

DN: How are components selected? Do you choose off-the-shelf components, or are some of the commissioned?

Anders Beck: UR has gone through 15 years of working with components. With our first robot, the base was off-the-shelf components. In a classical robot, the electronics are in the cabinet and the bearings are part of the structure. Every joint has six degrees of freedom in a separate drive. That was new because we simplified the design and the cable running down to the control box. A lot of the electronics were custom made.

We have a full safety rated system. The gearboxes are expensive to build, and we were a small player, so we built our own gearbox. The robot has a high torque-to-waste capacity and zero backlashes. We do choose off-the-shelf components, but we’re at the size where we’re working with new technology, so we’ll begin to get some commissioned components.

DN: Likewise, with the robot’s software. Are there off-the-shelf building blocks taken from the robot software world? Or is the software proprietary?

Anders Beck: UR brought two innovations to market. A lightweight safe arm and easy programming. We solved safety issues with a small and easy-to-carry arm that doesn’t require reinforced concrete. Plus, we made robot programming easy, requiring just a simple layer of training.

In recent years, beginning in 2016, we created an open community to build software modules that plug into our robot and extend its capabilities. You can use an app that makes it easy to communicate with the gripper. All of that is now plug and play. We’ve seen a huge growth in partners that contribute tooling and software. Uses like welding are being plugged into the robot. We have a platform where our partners can build their software on top of it. We’re moving away from single non-scalable solutions.

DN: How are new models determined? By quizzing users on their needs. Or by anticipating needs the users may not be aware of?

Anders Beck: Not so much from our customers. As Henry Ford said, “If we asked our customers what they wanted, they would have told us they wanted a faster horse.” We look at new technologies and the opportunities that come from new technologies. We put that into the equation. We listen to our users. We understand their needs. We push new technology into the market to solve problems that users may not know they have. We look at the barriers to the automation of a task. We released a 16-kilo robot because we had the demand for a heavier payload. Before the collaborative robots appeared, a lot of users didn’t realize they needed cobots.

 Rob Spiegel has covered automation and control for 19 years, 17 of them for Design News. Other topics he has covered include supply chain technology, alternative energy, and cybersecurity. For 10 years, he was the owner and publisher of the food magazine Chile Pepper.

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