A sheet processing system, comprising a number of drums for processing sheets, one of the drums comprising a seam area and a non-seam area, a gap between the drums, an actuator for displacing one of the drums for setting the gap, a manager, comprising a memory and a processor, that regulates the actuator current when the non-seam area passes through a nip so as to maintain a nip pressure, and signals the actuator to adjust the gap according to a predetermined gap setpoint profile when the seam area passes through the nip.