Patent ID: 6402080
Filing Date: 2002-06-11
Classification: B65H

Abstract:
Apparatus for winding threads onto bobbins with crosswinding, comprising:a delivery device including a delivery shaft operable to control a delivery speed of threads, a speed transmitter operable to generate a delivery shaft speed signal, a winding shaft carrying a plurality of friction rollers for driving respective bobbins, a yarn guide rod driven by traverse gearing and carrying a plurality of yarn guides for guiding yarn to the respective bobbins, a first variable speed motor driving the traverse gearing, a second variable speed motor driving the winding shaft, and a control unit operable to control the variable speed motors while changing their speeds from respective nominal speeds according to respective wobble curves to thereby avoid undesired bobbin thread winding patterns, wherein the delivery shaft speed signal from the speed transmitter is continuously fed to the control unit and is used by the control unit to set the nominal speeds of the variable speed motors, thereby assuring reliable antipatterning control of said variable speed motors during varying thread delivery speeds.