Patent ID: 7110101

Claim:
A method for testing a system before it is operational by detecting internal defaults due to manufacturing and mounting inaccuracies, wherein the system comprises a sensor or effector having a main axis, a receiver in which the sensor or effector is received, the receiver being rotatable directly about a first axis of rotation and indirectly about at least one further axis of rotation, a coder device providing intended angles of the main axis for any of a plurality of positions of the receiver, and wherein the inaccuracies resulting, for each position of the receiver in an angle difference between the actual angle of the main axis and the intended angle of the main axis, the method comprising the steps of attaching to the receiver an optical-electronic angular measurement device having at least two measurement axes and being adapted to provide actual changes of angles of the main axis, performing a determining procedure for the first axis of rotation axis or one of the further axes of rotation, while any rotation about the other axes is prevented, and after each rotation step providing a first actual change of the spatial angle of the main axis by the angular measurement device and storing the first actual change, and providing a first intended change of the spatial angle of the main axis by the coder device of the system and storing the first intended change.