Methods, systems, and apparatus, including computer programs encoded on computer storage media, for modifying a process definition to ensure accuracy, timeliness, or both of workcell measurement. One of the methods includes receiving an initial process definition for a process to be performed by a robot, wherein the process definition defines a sequence of actions to be performed in a workcell, and wherein a first action in the sequence of actions has an associated measurement tolerance; computing a predicted accumulated measurement variance for each of one or more actions that occur before the first action in the sequence; determining that the predicted accumulated measurement variance for the one or more actions that occur before the first action in the sequence exceeds a threshold; and in response, generating a modified process definition that inserts a measurement action at a location in the sequence before the first action.

A method for determining a trajectory of a robot from a starting position to a target position is provided. The starting position and the target position are manually defined by a user in a real environment of the robot. Then a collision-free trajectory of the robot from the starting position to the target position is determined, based on the surroundings of the robot. Also provided is a device, a robot system, a computer program and a machine-readable storage medium.

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for modifying a process definition to ensure accuracy, timeliness, or both of workcell measurement. One of the methods includes receiving an initial process definition for a process to be performed by a robot, wherein the process definition defines a sequence of actions to be performed in a workcell, and wherein a first action in the sequence of actions has an associated measurement tolerance; computing a predicted accumulated measurement variance for each of one or more actions that occur before the first action in the sequence; determining that the predicted accumulated measurement variance for the one or more actions that occur before the first action in the sequence exceeds a threshold; and in response, generating a modified process definition that inserts a measurement action at a location in the sequence before the first action.

A robot control device executes: capturing, using a hand-eye camera, a first image for use in image processing for determining a first target motion of a robot, and a second image for use in image processing for determining a second target motion following the first target motion; performing the image processing for determining the first target motion and the second target motion based on the first image and the second image, respectively; controlling the motion of the robot based on the first target motion and the second target motion. The image processing for determining the second target motion based on the second image is performed while the robot is in motion based on the first target motion. An image capturing device 82 captures the second image before the motion of a robot 60 based on the first target motion is completed.