Abstract: A method for sorting cheeses on an automatic winding machine includes predetermining a set-point value ratio of yarn length to cheese diameter. An actual value ratio of yarn length to cheese diameter is automatically measured. The measured values are automatically compared with the set-point values. Cheeses for which the actual value ratio of yarn length to cheese diameter is within a predetermined range of the set-point value ratio are automatically selected as quality cheeses.

Abstract: Method of controlling or regulating tension in a thread being wound on a textile coil rolling on a winding roller of a thread-winding device, which includes varying the peripheral speed of the textile coil by varying the transmission ratio between the rotary speed of the winding roller and the rotary speed of the textile coil to an extent greater than the variation in the transmission ratio therebetween resulting from the increasing fullness of the winding on the coil.

Abstract: Method of controlling a thread-joining operation in a rotor-spinning machine having a rotor formed with a fiber-collecting channel, wherein a pulse proportional to the rotary speed of the rotor is applied to control a measure of the material being processed in the spinning operation which includes automatically controlling advance feeding into the rotor of a quantity of fiber required for thread-joining and feeding the fiber beginning with withdrawal of a thread formed for the fiber as well as returning into the rotor the thread end to be joined and withdrawing the joined thread from the rotor during start-up of the rotor, the automatic control being in accordance with a quantity proportional to the peripheral velocity of the fiber-collecting channel of the rotor serving as control input variable for at least one of the fiber feed, the thread withdrawal, the beginning of the advance feeding and the beginning of the returning of the thread end, and device for carrying out the method.