Yarn Clearer and Quality Monitoring on Rotor Machines
topic
Electronic yarn clearers on rotor spinning machines monitor yarn mass using capacitive or optical sensors at each spinning unit delivery, cutting and signalling automatic piecing for yarn faults exceeding defined thick place, thin place, and nep thresholds set according to end-use quality requirements, with clearer cut rate per unit being a key process performance indicator reflecting raw material and rotor condition.
Role
Ensures rotor yarn quality by detecting and removing fault lengths before winding onto the delivery package, with yarn clearer setting optimisation determining the trade-off between fault removal effectiveness and excessive piecing frequency that reduces package uniformity and increases rotor cleaning cycle demand from the piecing process disturbing rotor groove cleanliness.