What is an example of span length increasing tracking error?
Many turret winders have wrinkles and tracking error during the index cycle. Entry-level turret winders have a winding nip in the primary winding position, but the nip doesn’t contact the roll once the index cycle begins. As the roll indexes away from the winding nip, the winding entry span length increases. In many cases, the non-cylindrical winding roll and the long span formed during indexing will cause wrinkling or tracking error. For faster processes and thicker products, this will cause a high percentage of wasted product.
