Importance

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Abstract

A textile winding head of the driven flyer type having a rotary bobbin carrier is provided with an adjustable brake of the electromagnetic induction type, preferably of the regenerative type, and a controller for increasing the braking torque progressively as the diameter of the package increases during winding so as to maintain close control over the tension of the material being wound. A tachogenerator may be connected to turn with the bobbin carrier to provide a signal varying with the angular velocity of a package being wound to provide an input signal to the controller for adjusting the braking torque. Additional tachogenerators may be connected to turn respectively with the delivery rollers and the flyer to provide correction signals, and the controller is preferably a computer for receiving the signals from the three tachogenerators and for providing an output signal for adjusting the braking torque. The brake is preferably an electric motor connected regeneratively and this may control more than one winding head, the torque being reduced automatically in the event of an end break.

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First Claim