Now measure as exactly as possible the distance of the tip of the centering pin in the elbow joint from the base plate and enter this value (terminate using 'Enter'). Now you have to measure the distance of the shoulder joint (axis 2) from the base plate as precisely as possible. For this, remove the large black plastic covering (with the Leybold logo printed on it) by loosening the 3 fast- ening screws. Now axis 2 is completely visible. Now measure the distance of the center of axis 2 to the base plate and enter this value using 'Enter'.