SYSTEM AND METHOD FOR TESTING YARN ALTERING DEVICES

摘要

A system and method for testing yarn altering devices (104) in which the yarn (12) is moved under precision yarn controls such as speed and tension, and then through the yarn altering device (104). Downstream of the yarn altering device (104) the yarn (12) is imaged, and from the image the widths of closely-spaced portions of the yarn (12) are determined to establish the effect on the yarn (12) of the yarn altering device (104).