Patent ID: 6009700
Filing Date: 2000-01-04
Classification: D01H

Abstract:
A method for operating an open-end spinning machine having a plurality of open-end spinning devices and a service unit for automatically servicing the spinning devices, the service unit having a device for piecing yarns being spun at the spinning devices and a control device for controlling actuation of the piecing device, each of the open-end spinning devices having a spinning rotor, a rotor shaft affixed to the rotor, an axial thrust-free support disk bearing forming a bearing wedge in which the rotor shaft is supported, and a magnetic bearing for positioning the rotor shaft, the method comprising:providing an identification marker on each spinning rotor,providing the service unit with a sensor device connected with the control device of the service unit for detecting the identification markers of the spinning rotors,detecting the identification markers by the sensor device, andactuating a yarn piecing operation by the service unit only upon detection of an identification marker identifying the spinning rotor to be compatible with the associated spinning device.