I had to maintain and touch up robots for the last 18 years. Mostly ABB large robots in the 80-220 kg capacity.
As long as people didn’t do something stupid they were pretty good.
The last 2 years the company I worked for had 3 UR cobots.
They loaded tubes into CNC lathes.
They didn’t replace an operator, they just freed them to inspect parts more thoroughly and bring in/out tubs.
They were a nightmare. To make them “safe” the joints had very sensitive force sensors in case a human bumped them they would stop.
They were constantly in need of adjustment and it wasn’t uncommon to need a replacement of at least on joint every 6 to 9 months. I thought the cobots were a FJ. They kept me raking in the money however. It’s good when no one else has any desire to work or learn something new.
Caged robots may not allow work side by side with a human but they are so much more robust and faster. They have had welding robots for 40 years now.
Its the Cobot aspect that I thought was interesting. That and it was a turnkey solution.
Need more bodies? A phonecall and $100k and you got yourself a *welder* !
Miller even handed the software and support. Made in Wisconsin by Miller, which is pretty neat.
I have a little experience working with traditional arm style caged robots and theyre pretty solidly made. Problems were rare. Theyd break your neck in a second if you got too close (past the fence) though.
I wasnt aware that the Cobot's safety systems caused so many issues but it makes sense. Ive never worked with one . You got to dial the speed and force back so much so they dont squash the meatbags I guess lol. Cant have the Cobot's running amok.
