Abstract: The invention relates to a separating device (3) and to a separating method for separating weed seeds and lost crops from the wastage outflow (102) of a harvesting machine (1). The separating device (3) is arranged on the harvesting machine (1) to the outlet area for the wastage (2) of the harvesting machine (1) and has at least one rotating separating element (31), with which a material stream substantially consisting of weed seeds and lost crops is separated from the wastage outflow (102) of the harvesting machine (1). The remaining material stream (103) substantially consists of non-grain constituents and can be spread back directly onto the field, while the separated material stream substantially consisting of weed seeds and lost crops can first be collected and e.g. rendered unable to germinate.

Abstract: A cutting unit arrangement for a harvester having a cutting unit has at least one working device relating to the processing and/or conveying of harvested crops and has a drive for the working device, wherein the drive is configured to drive the working device in accordance with harvesting operation via a rotatable drive element having a variable rotational speed. A control device of the cutting unit arrangement associated with the drive is configured to regulate the rotational speed of the drive element using a predefined desired rotational speed value.