Standard Cantilever Testing and Defect Scoring in Greige Cloth Inspection
Standard cantilever testing and four-point inspection verify greige cloth stiffness and fault densities to enforce contract specifications before finishing.
Overhang Angle
Angular Deviation
The inclination angle between outermost jacquard harness cords and the perpendicular plane of the comber board defines a geometric boundary in jacquard shed mechanisms. Within wide linen cloth production, overhang angle governs lateral friction as cords descend from the high-mounted machine neck to the perforated board below. When this slant expands on broad loom widths, harness cords rub aggressively against the interior rims of outer guide holes.
The parameter limits machine speed and cord longevity across complex damask installations.
Friction Impact
Lateral spreading amplifies frictional resistance and premature sheath degradation along harness perimeters. As the overhang angle climbs beyond safe thresholds, outer cords experience sharp cyclic bending during rapid pick insertion cycles. Chinese linen mills operating wide rapier frames observe rapid aramid sheath shredding and erratic heddle lift on edge pattern repeats.
Loom electronic sensors track shedding resistance, recording abnormal motor load spikes on shift diagnostic logs. Uneven cord return creates asymmetric shed openings, causing rapier heads to clip edge warp ends and create cloth defects.
Installation Boundary
Rigid dimensional standards govern the physical elevation of the jacquard head relative to the comber board. Machine builders specify maximum allowable angles, typically capping cord tilt at eighteen degrees from true vertical. Mill technicians verify this geometry during shed construction, documenting cord paths on loom erection inspection sheets prior to warp tie-in.
Overhang angle constraints dictate whether split jacquard heads or gantry extensions must support broad-width linen fabric manufacturing.