Control of a chopper arrangement for an agricultural harvester

A method of controlling a chopper arrangement of an agricultural harvester, the method comprising:

• receiving sensor data indicative of an intensity of chopping performed on crop material by the chopper arrangement;
• receiving sensor data indicative of a power consumption of the chopper arrangement;
• determining an actuator setting for at least one chopper arrangement actuator of the agricultural harvester in dependence on the received sensor data indicative of the intensity of chopping and the power consumption, the actuator setting including a first setting defining a degree of linear insertion and a second setting defining an angle of insertion, of at least one bank of counter knives of the chopper arrangement relative to a plurality of rotatable knife rows of the chopper arrangement, wherein the first and second settings are independent from one another;
• and,
• sending an actuator control signal to the at least one chopper arrangement actuator to control the at least one chopper arrangement actuator to operate in accordance with the associated determined actuator setting.

A chopper arrangement for an agricultural harvester, the chopper arrangement being configured for performing chopping on crop material processed by the agricultural harvester, the chopper arrangement comprising:

• a housing;
• a plurality of rotatable knife rows in the housing, the plurality of rotatable knife rows being rotatable about an axis to move crop material in the housing;
• and,
• a bank of counter knives movable relative to the housing to adjust a linear insertion amount and an insertion angle of the bank of counter knives into the rotatable knife rows,
• wherein the bank of counter knives comprises (i) an insertion angle actuator that is configured to adjust the insertion angle independent of the linear insertion amount of the bank of counter knives, and (ii) a linear insertion actuator that is configured to adjust the linear insertion amount independent of the insertion angle of the bank of counter knives.