Drop Wire

Motion Response

Modern high-speed rapier and air-jet looms distribute these stamped steel detectors across four to eight contact bars positioned between the harness frames and the back rest. Dynamic warp shedding introduces cyclic vertical acceleration that can displace an improperly weighted drop wire, causing an unintended machine shutdown. Weaving coarse dry-spun flax requires heavier components exceeding four grams, whereas fine wet-spun linen relies on lightweight elements under two grams to prevent excessive yarn depression.

Technical operators inspect contact bars for accumulated lint and lint-wax mixtures that insulate the circuit and delay loom stoppage. Inspection sheets document weekly circuit continuity checks alongside optical warp-stop sensor calibrations across active weaving sheds.

Fault Control

Fabric quality grading under international point systems penalizes missing warp ends and extended misdraws that result from unassisted yarn breaks. Production records from automated loom monitoring systems log every individual stop generated by a drop wire to evaluate package preparation quality and sizing efficiency. Warping defects that escape sizing inspection manifest as repeated stoppages on specific contact bars during high-tension shedding phases.

Mechanical wear on the inner eye surfaces creates sharp edges that shred natural bast fibre bundles, requiring scheduled replacement cycles verified during loom changeovers. Acceptance criteria for export-grade linen fabrics restrict warp-direction structural flaws to strict numerical limits per linear hundred meters. Quality auditors verify stop-motion response times during pre-shipment inspections to ensure full compliance with standard commercial fabric appearance criteria.