The traditional warp drawing is very primitive. Each yarn on the weaving shaft must be manually drawn into the heald, dropper, steel buckle and other weaving components one by one according to the requirements. The speed and output are low, and the quality cannot be guaranteed. It is not suitable for the requirements of modern high-speed, high-quality and high-performance shuttleless looms. It is the throat to realize the automation and high output of modern high-speed looms. Contemporary warp drawing and warp tying have been fully automated and the warp drawing has been completed by mechanical movements similar to robots. The speed of automatic warp drawing is very fast and can be more than 600 yarns/minute. The fully automatic warp drawing machine and warp tying machine were exhibited at the 2007 Munich and 2011 Barcelona ITMA, showing the prospect of weaving engineering automation and making new progress in weaving automation. It has promoted the process of weaving engineering automation.

Yongxusheng Company exhibited a new fully automatic warp drawing machine YXS-L, which replaced the original automatic warp drawing machine. After more than 20 years of research and testing, the automatic warp drawing machine has many new technologies and can adapt to many types of looms to wear multiple warp yarn heald frame hanging heald elements and can check the thickness and color of each warp yarn before drawing. This function can prevent double yarns in the heald and eliminate repeated defects in the drawing pattern. This important progress improves the quality of pre-weaving preparation. Each warp yarn is grabbed by a vacuum gripper on the warp drawing machine to complete the drawing action. The warp drawing machine is equipped with a photoelectric system to control the automatic drawing action. The double yarn detector prevents any double yarn from being twisted together. It can draw 200 warp yarns per minute. The new automatic warp drawing machine can not only draw fine yarns but also coarse yarns very conveniently, and is most suitable for drawing medium and coarse yarns. It is an ideal automatic warp drawing machine with the characteristics of automated networking. Modern electronic technology makes automatic warp drawing machines a reality. Moreover, before drawing in the warp, the photoelectric sensor can detect the situation of each pair of yarns separately, detect the wrong threading or yarn defects and make corrections very simple. This is the patented technology of the automatic drawing in machine. It can reliably complete the task of yarn defect detection without the need for some special components or special adjustments. It can ensure that no two yarns are drawn into one eye at the same time. The drawing in quality is very high.