Comber Board Precision
Spatial calibration inside the jacquard shed relies entirely upon comber board alignment to keep harness cords vertical during high speed flax yarn weaving. Mechanical guides suspend perforated wooden or composite plates above the loom frame, positioning thousands of individual mails through which warp threads pass toward the fell. Precise lateral and longitudinal placement stops lateral friction against adjacent threads during shed closure, preserving fragile bast fibers against premature fatigue.
Production supervisors verify coordinate settings using plumb bines and laser levels before loading delicate linen warps, ensuring holes match cylinder pitches exactly. Operating boundaries end at the heddle eye plane, below which independent harness return springs govern vertical tension rather than plate geometry.
Harness Geometry Control
Mill technicians inspect frame parallelism weekly to prevent unequal shedding tension from distorting grey cloth dimensions. Misaligned guide plates subject individual flax filaments to asymmetric abrasion, creating localized weak points that compromise tensile strength during subsequent wet finishing operations. Maintenance crews adjust threaded suspension rods beneath the superstructure until dial indicators confirm zero lateral deflection across the entire operational width.
Factory quality audits cross reference these mechanical readings against warp breakage logs recorded during standard eight hour shifts. Technicians correct minor thermal expansion discrepancies caused by seasonal ambient temperature shifts inside the spinning facility before starting new weaving runs.
Shedding Tolerance Margin
Finished linen density relies upon strict adherence to maximum allowable displacement limits established during initial loom commissioning. Export grade damask production demands absolute uniformity across every square centimeter, prohibiting deviations exceeding tenths of a millimeter at the comber plate level. Inspectors grade resulting fabric panels according to surface regularity and reed mark absence, separating premium export merchandise from secondary commercial stock.
Final mill acceptance criteria override internal production targets whenever buyer quality dossiers specify tighter geometric tolerances for luxury home textiles.