The harvesting machine has a receiving device (6) for receiving crop material from the ground, and a conveying channel (9) that leads from the receiving device into a processing chamber such as press chamber. A cutting device (10) has several knives (12) for cutting the crops transferred through the conveying channel. A grinding apparatus (13) grinds the knife that is placed in the conveying direction of the delivery channel and displaceably mounted in a grinding position in lateral edge region.
