an operator the yarn quality data is determined by the yarn quality monitor 27 the so called cleaner any detected quality deviations are reported via the signal line 27a to the computer 36 of the control device 5 at the spinning station 4 a signal emitter 44 is disposed on the drive shaft 43 of the winding roller 30 whereby the signals emitted per unit of time by the signal emitter 44 may be counted by means of a sensor 45 and in this manner the winding speed rpm of the winding roller 30 for this unit of time is determined these signals are forwarded to the computer 36 of the control device 5 of the spinning station via the signal line 45a it is possible by means of this data to determine the length of yarn spun for example which is part of the production data the two headed arrow 46 at the control device 5 is intended to indicate that further data of the spinning station for example data from the spin box 20 is transmitted to and stored by the local control device 5 and that it is also possible for the local control device 5 to issue commands for example for controlling operational elements of the spin box 20 to disconnect the draw in roller for a piecing operation and or to lift the spinning rotor off its drive belt and brake it the data collected at a spinning station can be stored in a memory 47 of the spinning station computer 36 for example and called up by the central control device 8 when the service unit 7 is positioned in front.