Abstract: An adjustment drive for an adjustable spacing comb for a hair cutting appliance that may be fitted with an adjustable spacing comb. The adjustment drive comprises an actuator for actuating a movable comb portion of the adjustable spacing comb with respect to a blade set of the hair cutting appliance, a manually operable rotation element, and a rotary encoder, that is configured to detect rotary movement of the rotation element and to output a respective user input signal, wherein the actuator is operated in response to the user input signal.

Abstract: The present disclosure relates to an adjustment drive (50) for an adjustable spacing comb (26) for a hair cutting appliance (10) and to a hair cutting appliance (10) that is fitted with an adjustable spacing comb (26). The present disclosure further relates to a method for operating an adjustable spacing comb (26) for a hair cutting appliance (10). The adjustment drive (50) comprises an actuator (52) for actuating a movable comb portion (40) of the adjustable spacing comb (26) with respect to a blade set (16) of the hair cutting appliance (10), a manually operable rotation element (64), particularly a manually rotatable rotation element (64) and an encoder (70) particularly a rotary encoder (70), that is configured to detect rotary movement of the rotation element (64) and to output a respective user input signal, wherein the actuator (52) is operated on the basis of the user input signal.