Open-end spinning machine and method and control device for operating such open-end spinning machine

The invention relates to an open-end spinning machine (1) having a plurality of stations (2). The free-end spinning machine (1) has a plurality of stations (2), each station having a spinning device (3) for processing a yarn (7), a yarn drawing device (25) for drawing the yarn (7) from the spinning device (3), a yarn storage nozzle (26) for temporarily storing the drawn yarn (7), a winding device (4) for producing cross-wound bobbins (8) and a suction nozzle (14) which can be subjected to negative pressure, and the free-end spinning machine (1) is equipped with at least one service unit (16) serving the plurality of stations (2), the service unit is provided with an auxiliary yarn conveying device (21) for providing auxiliary yarn (24) and an auxiliary yarn drawing device (28), and the auxiliary yarn conveying device (21) and the auxiliary yarn drawing device (28) are used in the yarn splicing process of a station (2) to be served, especially in the replacement process of cross-wound bobbins/empty bobbins. Th