Calculating Electronic Card Setup Fees and Loom Hour Output Surcharges
Electronic card fees cover digital hook mapping while loom hour output surcharges adjust metre costs for reduced insertion speed and lower shed efficiency.
Harness Hook Allocation
Coordinate Mapping
Spatial distribution schemes assign jacquard machine lifting hooks to specific harness cords, comber board holes and warp positions across the width of a loom. Harness hook allocation determines the pattern repeat structure, selvedge configuration and border layout of a decorative fabric formation setup. Chinese linen mills configure these hook assignments to balance mechanical loads across the jacquard gantry when running heavy flax cloths.
The resulting allocation plan establishes the exact mapping rules that textile CAD software must follow during pattern file compilation. Physical comber board dimensions and total harness cord capacity impose absolute limits on the allocation scheme.
Shedding Distribution
Layout drafts partition the total hook capacity of the shedding machine into functional groups for the body pattern, side borders and selvedges. Harness hook allocation distributes linen warp ends through single, repeat or point draw arrangements depending on the target textile construction. Heavy linen table cloths often require reinforced border allocations with higher hook densities to withstand dense weft beating without distortion.
Uneven allocation angles between the overhead jacquard head and the lower comber board induce cord friction, accelerating harness wear and causing mislifts on peripheral warp ends. Setup technicians verify cord angles during gantry installation to maintain uniform shed heights across the entire reed width.
Pattern Execution
Structural design software compiles binary lifting instructions based on the verified hook assignment table. Harness hook allocation errors lead to transposed design elements, broken floats or missing selvedge interlacings that compromise cloth stability. Technicians execute test patterns on sample lengths of linen fabric to confirm that hook movements match the mechanical tie up plan.
The technical parameters of the allocation scheme are archived in the mill loom setup ledger alongside reed width, warp count and pick density specifications. Any physical re tie of the harness assembly requires an update to the allocation record before new production orders can be programmed.