High speed precision yarn winding system

摘要

A high-speed precision winder for winding a running yarn onto a package tube to form a cross wound yarn package, including a spindle for rotating the tube about a spindle axis, a yarn traversing mechanism for guiding running yarn received along an infeed path back and forth across a transverse zone, a bail roll disposed in rolling contact with the peripheral surface of the yarn package being wound, apparatus for controlling tension of the infeed yarn, and a control system for continuously regulating operation of the winder during formation of the package. The control system includes three separate variable speed drive motors and respective associated motor control circuits forming a spindle drive, a transversing means drive, and a down pressure drive providing three independent motor systems which are separately controllable. A load cell structure is associated with the bail roll and output signals from the load cell and predetermined set processing conditions data applied to a microprocessor provide control signals to activate the motors to control the relative positions of the bail roll and package tube and regulate the spindle drive and traversing mechanism drive to maintain a desired yarn density and tension throughout winding of the package.