An automated hair cutting system comprising a portable hand-held hair processing appliance, a hair processing unit arranged at the appliance, and a position monitoring arrangement, the position monitoring arrangement comprising: - a plurality of position sensors arranged to be attached to a subject whose hair is to be processed, - a transmitter that is operatively coupled with at least two position sensors of the plurality of position sensors, and - a position controller that is arranged to detect a relative orientation between the at least two position sensors arranged to be attached to a subject whose hair is to be processed in a calibration mode and to detect a defined change in the relative orientation between the at least two position sensors attached to the subject whose hair is to be processed in an operation mode, the position controller further arranged to calculate the position of the hair processing appliance, wherein at least one feature of the hair processing appliance is controllable dependent on at least one of an actual orientation and the actual position of the hair processing appliance with respect to a head of the subject, wherein the transmitter is arranged at the housing of the hair processing appliance, and wherein the at least two position sensors form a position reference for magnetic position detection, characterized in that the position controller is further arranged to signal a misorientation state between the at least two position sensors, wherein a misorientation state is a certain level or degree of relative movement between two of the at least two position sensors is detected beyond a threshold or range for allowed relative movements. - a plurality of position sensors arranged to be attached to a subject whose hair is to be processed, - a transmitter that is operatively coupled with at least two position sensors of the plurality of position sensors, and - a position controller that is arranged to detect a relative orientation between the at least two position sensors arranged to be attached to a subject whose hair is to be processed in a calibration mode and to detect a defined change in the relative orientation between the at least two position sensors attached to the subject whose hair is to be processed in an operation mode, the position controller further arranged to calculate the position of the hair processing appliance, wherein at least one feature of the hair processing appliance is controllable dependent on at least one of an actual orientation and the actual position of the hair processing appliance with respect to a head of the subject, wherein the transmitter is arranged at the housing of the hair processing appliance, and wherein the at least two position sensors form a position reference for magnetic position detection, characterized in that the position controller is further arranged to signal a misorientation state between the at least two position sensors, wherein a misorientation state is a certain level or degree of relative movement between two of the at least two position sensors is detected beyond a threshold or range for allowed relative movements. wherein at least one feature of the hair processing appliance is controllable dependent on at least one of an actual orientation and the actual position of the hair processing appliance with respect to a head of the subject, wherein the transmitter is arranged at the housing of the hair processing appliance, and wherein the at least two position sensors form a position reference for magnetic position detection, characterized in that the position controller is further arranged to signal a misorientation state between the at least two position sensors, wherein a misorientation state is a certain level or degree of relative movement between two of the at least two position sensors is detected beyond a threshold or range for allowed relative movements.