The machine is designed for semi-automatic operation.
The web coming from the pre-dryer section is guided by paper-guide rolls through the size press. Subsequently, while the rolls rotate in synchrony with the machine speed, the operator controls the closing of the of the press nip.
The opening of the nozzles is automatic when the appropriate photoelectric sensors indicate the presence of a full width web in the machine.
The approach of the cylinders is very fast, whilst the definite closure is relatively slow in order to prevent sheet breaks.
The operator sets up the working pressure on the nip and the PLC process runs all the sequences, the hydraulic unit and its pumps in accordance with safety procedures.
The prerator chooses to use of the cleaning doctor in either fixed or oscillating mode.