Size Pickup and Add-On Measurement
topic
Size add-on measurement by weighing yarn samples before and after sizing and conditioning to equilibrium moisture determines the percentage dry size applied to the yarn weight, with inline beta gauge or infrared measurement providing continuous add-on monitoring and feedback to squeeze roll pressure control that maintains consistent add-on within plus or minus 0.5 percent throughout the sizing run, with add-on uniformity across the warp width being verified by sampling ends from different warp positions.
Role
Monitors the most critical sizing process parameter whose value and uniformity determine whether the sized warp achieves the target abrasion resistance and warp break rate reduction, with add-on being too low producing inadequate fibre binding that results in excessive warp breaks and too high causing size accumulation in heddle eyes and reed dents that progressively increases warp breakage as size deposits abrade yarn, requiring precise control within a narrow optimum range for each yarn and fabric construction.