Cobot user frame calibration: a practical guide

Have you ever wondered why your cobot doesn’t accurately reach the positions it should, for example during a pallettizing operation?

In this study, conducted in collaboration with the Applied Mechanics group of the University of Brescia, we studied the repeatability performances of the vision-based RPS user frame calibration system of the Sawyer cobot and compared them with the performances obtained after calibrating the robot using traditional 3- and 5-points methods involving rigid markers.

The analysis showed that the RPS system is currently not robust enough to guarantee acceptable performances when the robot moves very distant from the landmark position due to the computation of local planes instead of a single plane considering several calibration points. 

Check out the paper to find out more about this study!