Sequence Control
Smooth parallel bars positioned within warp preparation machinery maintain accurate yarn order during high-speed winding operations. Sizing machine operators insert lease rods between alternating sheets of flax warp yarn to preserve end order established during warping. These polished metal or composite tubes prevent yarn cross-overs that cause yarn breakage during loom shedding.
Separating distinct warp sheets allows sizing polymers to coat individual yarn surfaces uniformly without entanglement. Sectional warping sequences end when lease rods are removed before loom beam mounting.
Fibre Alignment
Layer management relies on exact spatial separation across the entire width of the sizing machine headstock. During linen warp preparation, lease rods direct separated yarn layers into upper and lower paths to facilitate inspection and breakage repair. Reduced friction prevents static generation on delicate linen yarns.
Tension spikes damage bast filaments.
Warp Boundary
Defective positioning of yarn dividers introduces twist errors and localized abrasion across processing sheets. Polished stainless steel surfaces on lease rods resist wear caused by coarse flax fibres during continuous operation. Variations in yarn count require adjustments to bar spacing.
Oversized diameter bars increase bending angles unnecessarily. Dynamic yarn tension must remain within five percent across all layers to prevent uneven stretch during drying.
