Abstract
The C.E.R.M.O. developed a measuring system to determine repeatability and accuracy of positioning. A mechanical structure, placed in the working area of a robot, supports a measuring tribedrop on which six sensors detect the position of a light reference cube fitted to the wrist of the robot. A computer controls automatically the measuring cycle and calculates errors of repeatability on three perpendicular axes (translation and rotation errors). By using the same programme, accuracy of positioning on a short distance can be determined.
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