Method and baler for pressing bales of material

A baler for pressing bales of material, the baler comprising:

• an inlet for receiving material fed into the baler in an inlet direction;
• a first chamber connected to the inlet and receiving the material from the inlet, the first chamber arranged perpendicular to the inlet direction, and the first chamber comprising a first press configured to pre-compress the material, in a first direction orthogonal to the inlet direction and into a pre-compressed material, wherein the material is pre-compressed in the first chamber under a number of compressing cycles;
• a second chamber comprising a second press configured to compress the pre-compressed material into a finished bale of compressed material;
• a transport unit configured to transport the pre-compressed material into the second chamber in a second direction orthogonal to the inlet direction and orthogonal to the first direction, wherein the first press configured to pre-compress the material against a sidewall of the transport unit while the side wall of the transport unit is positioned in front of the first press, and the pre-compressed material is transported by the transport unit from the first chamber into the second chamber in a limited space, such that a threshold expansion of the pre-compressed material is prevented;
• and
• a control unit connected to the first press, the control unit configured to:
• measure a pressure resistance from the material in at least one of the number of compressing cycles,
• calculate an opening degree of the inlet based on the measured pressure resistance to achieve an optimal volume of the pre-compressed material before being transported to the second chamber, and
• control the first press for setting the calculated opening degree of the inlet, wherein movement of the first press controls the opening degree of the inlet.