Weft Break Detection and Response Systems
topic
Weft break detection systems use yarn presence sensors at the feeder output and in the yarn path between feeder and insertion mechanism, with break detection triggering immediate loom stop before the broken end is drawn into the shed where its absence would create a missing pick defect in the fabric, and with the weft search function on modern looms automatically finding and re-presenting the broken end to the insertion mechanism after the break has been cleared, reducing restart time from minutes to seconds.
Role
Prevents the missing pick defects that cause fabric rejection or downgrading by stopping the loom immediately when a weft break is detected before the broken pick is beaten into the fabric, with the automatic yarn search function that retrieves the weft end after break detection being a major productivity improvement over manual yarn threading after each break that significantly reduces the weft break-related downtime in shuttleless weaving rooms.