Abstract: A device and a method for tool center point calibration of an industrial robot. The device is intended to calibrate an industrial robot with respect to a tool mounted on the robot. The device includes a camera designed to take a plurality of images of at least part of the robot tool for a plurality of different tool orientations, an image-processing unit designed to determine the positions of the robot tool in the orientations based on the images, a calculation module adapted to calculate the position of the center point of the robot tool, based on the determined positions, and a control module adapted to calculate the corrective movements of the robot.

Abstract: A method for calibration of an industrial robot having a plurality of sections movably connected to each other for rotation about a plurality of movement axes. An angle measuring member is mounted on the robot so that it measures angular changes of the axis or axes to be calibrated, relative to a vertical line. A reference direction is measured. At least one of the axes is selected as a calibration axis and another of the axes is selected as a measuring axis. The robot is moved between at least two calibration positions. The moving includes rotating the robot about the measuring axis. The calibration positions are selected such that the direction of the calibration axis differs from the vertical line. Angular values are read from the angle measuring member in the calibration positions. The calibration axis are calibrated based on the angular values and the measured reference direction.