Abstract: A pusher mechanism comprising a finger assembly, an upper cylinder including a shaft secured to the finger assembly for displacing the finger assembly between retracted and extended positions, housing means supporting the upper cylinder for pivotal displacement, means for pivotally displacing the upper cylinder from a start location to an end location when the finger assembly is extended including a servomotor, a control including profile generating means for generating a profile having a plurality of constant acceleration segments beginning at selected locations and an amplifier for receiving the profile and for driving the servomotor in response thereto, dynamic electronic clutch means for stopping the servomotor to prevent damage to the pusher mechanism when the pivotal displacement of the upper cylinder to the end location is prevented including the amplifier including means for generating a motor current signal, limit logic means including a corresponding plurality of selected constant current limits cor