The development of the winder is relatively short in China, which originated in the1950s. The common winder can not meet the needs of production because of itspoor winding quality and low production efficiency. With the continuousimprovement of the speed and product quality of shuttle-free loom and knittingmachine,the quality requirement of bobbin yarn is increasing day by day, sothe automatic winder emerges as the times require. The reciprocating motion ofthe yarn in the winding increases the evenness and decreases the strength ofthe yarn. With the increase of speed, the yarn quality of automatic windingmachine is still better than that of ordinary winding machine, such asunevenness of yarn, frequent yarn defects and loss of strength, but the qualityis still better than that of ordinary winding machine as long as the processchoice is appropriate. In addition to the tension caused by the speed, theeffect of the air ring and the friction of the yarn guide part during thewinding, the tension device is also used to control the tension of the windingdrum. The tension is adjusted according to the technological requirements, andthe yarn tension is obtained according to the principle of friction braking. Inview of the fact that the tension of small yarn unwinding in differentpositions is not equal, the tension constant compensation device is adopted inthe automatic winder, which can be set by computer unified or grouped, drivenby motor of tension disc, and actively rotated, and the tension disk is drivenby motor, and the tension disc is driven by motor. The tension is adjustedautomatically according to the testing information of tension sensor, and thetension difference between yarns is reduced. The birth of automatic winder notonly improves the productivity of labor, but also improves the quality ofspinning and meets the demand of the market.