US Patent 10345788 Robot system

A controller is configured to operate a robot arm at a speed that is equal to or lower than a first maximum speed in a high-speed operation region, and operate the robot arm at a speed that is equal to or lower than a second maximum speed lower than the first maximum speed in a low-speed operation region, and change a collision detection sensitivity between the high-speed operation region and the low-speed operation region so that the collision detection sensitivity in the high-speed operation region becomes lower than the collision detection sensitivity in the low-speed operation region.