Research and development of yarn length recorder for cone winding

In order to reduce the waste yarn in the follow-up process and rewinding operation,a yarn length recorder for cone winding machine was designed.Two Hall sensors are used for this purpose.One is installed on the principal axis of the slotted drum for testing its revolutions,and the other one,on the cone,tests the actual revolutions of the cone.The linear velocity slip rate between the slotted drum and the cone was calculated according to the revolutions of slotted drum,the actual revolutions of cone,the diameter of slotted drum and the instant transmission radius of cone when the actual revolutions of cone is added up to a definite value.According to the linear velocity slip rate,the yarn length of cone is calculated and then added up.The cutter cuts off the yarn when the yarn length of cone reaches the preset value and sends a signal.This device can be used either in the design of a new machine or in the renovation of an old machine.