30 enters as the travel plate 30 is displaced the guide pin 14 is displaced along the guiding groove 15 so that the linear drive 12 executes a swiveling movement imposed by the guiding groove 15 at the end points of the travel way of the travel plate 30 within the linear drive 12 the end position is detected by means of limit switches 16 17 fig1 and 2 show the linear drive 12 with the travel plate 30 fully extended in the retracted state the travel plate 30 is pulled back to the rear stopping point that is detected by the limit switch 16 a holding hoop 32 and a boom 31 are attached to the travel plate 30 the holding hoop 32 serves to hold and guide electrical and compressed air lines to the cleaning units a first cleaning unit 40 for the cleaning of a spinning rotor 80 and a second cleaning unit 60 for the cleaning of a yarn draw off nozzle 82 while the rotor cover 83 is open are located on the boom 31 the first cleaning unit 40 is mounted on a holder 41 at the forward end of the boom 31 the holder 41 supports an electric motor 42 and a compressed air supply 43 to convey compressed air to a cleaning head.