The present invention is directed to a home food or beverage preparation machine (1) comprising a mechanical part which is mobile between at least a first and a second position. The machine (1) comprises an actuator comprising a wire (13) made of a shape memory material. This wire (13) has a retracted state and an extended state, and the actuator is configured to move the mechanical part to or maintain the mechanical part in one of said first and second positions by retraction of the wire. Any mobile part of a home food or beverage preparation machine, and more particularly a valve assembly or a mobile plate (22) for clamping an ingredient package may thus be moved instantaneously without noise between its different positions.