CONTROL OF A CHOPPER ARRANGEMENT FOR AN AGRICULTURAL HARVESTER

The invention provides a controller (300) for controlling a chopper arrangement (72) of an agricultural harvester (10). The controller (300) receives sensor data indicative of an intensity of chopping (310) performed on crop material by the chopper arrangement, and sensor data indicative of a power consumption (314) of the chopper arrangement (72). The controller (300) has a processor (302) to determine an actuator setting for at least one chopper arrangement actuator of the agricultural harvester (10) in dependence on the received sensor data indicative of the intensity of chopping (310) and the received sensor data indicative of the power consumption (314). The controller (300) sends an actuator control signal (316) 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. The determined actuator setting includes an amount of insertion, and an angle of insertion, of at least one bank of counter knives (86) of the chopper arrangement (72) relative to a plurality of rotatable knife rows (74) of the chopper arrangement (72).