Abstract: A method of building a geometric representation over a working space of a robot is provided. The method is performed in a control device and includes: representing the working space by a three-dimensional structure, obtaining information on a trajectory in the working space travelled by the robot as being collision free, determining, based on the obtained information on the collision free trajectory and on information on geometry of the robot, a volume in the working space to be free space, the volume corresponding to the geometry of at least a part of the robot having travelled along the trajectory, and updating the three-dimensional structure by indicating the determined volume of the three-dimensional structure as free space.

Abstract: A method and an apparatus for automatically generating a collision free return program for returning a robot from a stop position to a predefined restart position when the robot has been stopped during operation due to an error. The apparatus includes a receiving part adapted to receive a request for a recovery path and information on the stop position of the robot. A path generating part is adapted to generate a collision free recovery path for the robot upon receiving the request, based on the predefined restart position and the stop position of the robot using a path planning algorithm that generates robot positions connected by collision free path segments. A programming part is adapted to generate the return program based on the generated return path.