A movement system includes a drive having a drive shaft, a mechanism that converts an alteration to a rotational angle of the drive shaft into an alteration to an object position, and a rotational angle sensor for detecting the alteration to the rotational angle. The movement system includes a reference sensor for emitting a reference signal when the object enters a predetermined reference volume, and a controller communicating with the rotational angle sensor and the reference sensor. The controller is configured for determining a total rotational angle from alterations to the rotational angle detected according to the reference signal and for activating the drive for rotating the drive shaft by a reference rotational angle determined as a function of a predetermined reference positional value and the total rotational angle. The movement system also includes a calibration sensor for emitting a calibration signal when the object enters a predetermined calibration volume.
