Method for calibrating a measuring arrangement (74, 75) for determining rotational positions of a rotary device (51, 53) that has a first part and a second part, which can be rotated relative to the first part about a rotational axis, wherein: • measured values of rotational positions of the first part and the second part relative to one another are detected in various rotational positions of the rotary device (51, 53) respectively by a plurality of sensors, the sensors being arranged at various angular positions distributed around the rotational axis, and a measuring signal corresponding to the detected rotational position is respectively generated, so that redundant information concerning each of the rotational positions of the rotary device (51, 53) is obtained, • there is provided, or has been provided, a calculation model in which differences in the rotational positions detected by various sensors are formed, and specifically in each case in pairs for the rotational positions detected by two of the sensors and/or in each case between a rotational position detected by one of the sensors and a reference rotational position, and wherein the differences and consequently the redundant information, are expressed by - translational errors, assigned to the respective sensor, of the detected rotational position that are caused by a translational movement transverse to the extent of the rotational axis, - measuring errors of the measuring arrangement that are not errors caused by a translational movement, and - angular positions of the sensors about the rotational axis, • the translational errors assigned to the respective sensor and the measuring errors of the measuring arrangement are determined from the calculation model and the measuring arrangement (74, 75) is calibrated while taking into consideration the translational errors and the measuring errors of the measuring arrangement. • measured values of rotational positions of the first part and the second part relative to one another are detected in various rotational positions of the rotary device (51, 53) respectively by a plurality of sensors, the sensors being arranged at various angular positions distributed around the rotational axis, and a measuring signal corresponding to the detected rotational position is respectively generated, so that redundant information concerning each of the rotational positions of the rotary device (51, 53) is obtained, • there is provided, or has been provided, a calculation model in which differences in the rotational positions detected by various sensors are formed, and specifically in each case in pairs for the rotational positions detected by two of the sensors and/or in each case between a rotational position detected by one of the sensors and a reference rotational position, and wherein the differences and consequently the redundant information, are expressed by - translational errors, assigned to the respective sensor, of the detected rotational position that are caused by a translational movement transverse to the extent of the rotational axis, - measuring errors of the measuring arrangement that are not errors caused by a translational movement, and - angular positions of the sensors about the rotational axis, - translational errors, assigned to the respective sensor, of the detected rotational position that are caused by a translational movement transverse to the extent of the rotational axis, - measuring errors of the measuring arrangement that are not errors caused by a translational movement, and - angular positions of the sensors about the rotational axis, • the translational errors assigned to the respective sensor and the measuring errors of the measuring arrangement are determined from the calculation model and the measuring arrangement (74, 75) is calibrated while taking into consideration the translational errors and the measuring errors of the measuring arrangement.