Determining yarn tension in ring spinning

A procedure is established to determine yarn tension for various regions of a yam path by measuring two yarn force components at the yarn guide as wel l as by using well known theoretical and empirical equations. Two component s of ring rail acceleration are measured in the direction of the measured f orce 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 b alloon angle at the yarn guide on yam tension, a slowly variable force comp onent is analyzed. The slowly varying component of the measured force is de termined by numerical filtering with a computer. The angle of the yarn ball oon at the yam guide is determined by recording the balloon with an SVHS ca mera, whereas the feeding yarn angle at the yarn guide is determined mathem atically from the kinematics of ring rail and yarn guide movement.