US Patent 7540129 Adjustment assembly for a harvesting machine

An arrangement for the automatic adjustment of the cut height of a front harvesting attachment on a harvesting machine for the harvesting of stalk-like plants. A controller is connected to a sensor and to an actuator that can adjust the cut height of the front harvesting attachment based on the detection by the sensor of at least one characteristic of the harvested crop material and can be repositioned as a function of the signal of the sensor.