The winder is a special equipment for the textile industry. Winding, as the last process of spinning and the first process of weaving, plays the role of a "bridge" connecting the past and the next, so it occupies an important position in the textile field. Process requirements: 1. The winding tension is appropriate and does not damage the original physical and mechanical properties of the yarn. 2. The bobbin package has large capacity, good shape and easy unwinding. 3. The yarn joint is small and strong, and try to form a knotless yarn. 4. The length of the bobbin used for warping should be fixed, and the bobbin used for dyeing should have a uniform structure (even roll density).