Electronic Yarn Clearing and Defect Detection
topic
Electronic yarn clearers on winding machines use capacitance sensors or optical sensors to continuously measure yarn cross-section or diameter at 100 to 400 metres per minute, detecting thick places, thin places, neps, and foreign fibre contamination above defined sensitivity thresholds and triggering a cutter that severs the yarn immediately at the defect for subsequent splicing, with clearing parameters programmed to the customer specification for each yarn count and quality grade.
Role
Removes yarn defects above defined severity thresholds during winding by detecting and cutting out thick, thin, and contaminated yarn sections that would cause knitting needle breakage, weaving stops, or fabric defects in downstream processing, with clearer sensitivity settings representing the critical compromise between removing sufficient defects for downstream quality requirements and avoiding excessive cutting that reduces winding efficiency and increases splice frequency.