Method for reduction of chopper recut

An agricultural harvester machine comprising:

• a chassis configured for movement on a surface;
• and
• a residue chopper comprising:
• a housing defining a partially enclosed cutting chamber, the housing comprising a housing inlet and a housing outlet with respective sections of housing wall extending between the inlet and outlet;
• a cutting knife assembly comprising a shaft mounted to rotate in a cutting direction within the cutting chamber about a cutting knife rotation axis extending along a longitudinal direction, the cutting knife assembly comprising a plurality of knives extending from the shaft at respective axial locations along the longitudinal direction, each of the plurality of knives extending from a respective proximal end at the shaft to a respective distal end at a radial distance from the shaft, the radial distance defining an outer radius of a cutting volume;
• a counterknife assembly comprising one or more counterknives mounted to a counterknife support, the counterknives positioned to extend into the cutting volume at a position, with reference to the cutting direction, downstream from the housing inlet;
• a first shear bar positioned near a downstream closing of the housing outlet;
• a second shear bar positioned downstream of the first shear bar near an upstream opening of the housing inlet;
• and
• an air catch formed by a radially expanded section of the housing wall between the downstream closing of the housing outlet and the upstream opening of the housing inlet.