Ring Spinning Quality Control

Quality monitoring: Uster testing (evenness CV%, thin places, thick places, neps—100% online monitoring on modern machines), tensile testing (tenacity, elongation—sample basis per lot), hairiness measurement (Uster Tensorapid—optical counting of protruding fibres), twist testing (direct counting or untwist-twist method—twist variation CV% <3% target), and appearance grading (Uster classimat—AFIS for short fibre content). Process control: roving quality (CV%, twist uniformity affecting downstream), drafting zone setting verification (roller settings, pressure, timing), traveler selection and condition (wear affecting tension, breaks), ring and traveler matching (clearance 0.03-0.08 mm optimal), and environmental control (temperature 24-28°C, RH 55-65% for cotton preventing breakage).