Abstract
A procedure is established to determine yarn tension for various regions of a yarn path by measuring two yarn force components at the yarn guide as well as by using well known theoretical and empirical equations. Two components of ring rail acceleration are measured in the direction of the measured force to eliminate the influence of various disturbances on the measurement of force at the yarn guide. Yarn tension is analyzed without the influence of air drag force or gravitational and Coriolis acceleration. To track the influence of spinning position, winding diameter, feeding yarn angle, and balloon angle at the yarn guide on yarn tension, a slowly variable force component is analyzed. The slowly varying component of the measured force is determined by numerical filtering with a computer. The angle of the yarn balloon at the yarn guide is determined by recording the balloon with an SVHS camera, whereas the feeding yarn angle at the yarn guide is determined mathematically from the kinematics of ring rail and yarn guide movement.
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