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handling parts can be a hair-raising experience

in rethinking robotics by Anthony Robson

Ever notice that the belt inside a van der graaf generator looks a lot like a conveyor? Handling of parts, particularly plastic parts, can create relative motion between the part and the equipment. For example, handling parts sliding down a chute or resting on a moving conveyor could result in a shocking experience for workers, including Baxter. Any individual part may not accumulate a significant charge, but creating stacks of charged parts for packaging creates the potential (pun intended) for a nasty surprise. When the cumulative charge reaches a point where the air gap between the part and the nearest metal – such as the structure of a robot end effector – is no longer enough insulation, an electrostatic discharge (ESD) event can occur, sometimes in the order of several kilovolts!

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Proper grounding of equipment and parts can help mitigate ESD as can some other methods of eliminating electrostatic charge such as an air ionizer. Rethink Robotics recommends precautionary measures to protect Baxter if there’s a chance of ESD in excess of 3kV. Protection involves positioning a ground wire on the end effector as close to the part as possible, then running it back down the arm to Baxter’s mounting bolts. This provides a secure ground path for ESD, and a happy robot.

(2 comments)


About the Author

Anthony Robson

Anthony is a veteran of robotics in the semiconductor industry who couldn’t wait to befriend Baxter and embrace the challenge of bringing manufacturing jobs back to the US via cost-effective, human-friendly robots. (Though some say his ulterior motive is to develop a robot that will finally take the trash out and wash the pots and pans.)


2 comments on this article

Jeff Green

Jeff Green February 3, 2014 at 10:04 am

Thanks Phen375, that’s great to hear. We’ll be publishing more posts shortly. You might want to subscribe so you’ll automatically get a message when we publish new content.

Jeff Green

Jeff Green February 3, 2014 at 10:11 am

Yes, we have a number of resources, including…

Baxter robot products page – http://rethinkrobotic.wpengine.com/products/overview/

Rethink Robotics YouTube channnel – https://www.youtube.com/user/RethinkRobotics

That should get you started, but let us know if you’re looking for something specific. We’ll be happy to point you in the right direction.


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