Dynamic Dynamic Load Modeling and Resonance Damping in Broad Harness Superstructures
Damping broad jacquard superstructure resonance stabilizes comber board deflection below half a millimeter, extending cord fatigue life and preserving shed clarity.
Warp Shed Height
Shed Dimension
Vertical clearance represents the maximum opening between the upper and lower sheets of warp threads during the shed cycle of a loom. In linen weaving, the warp shed height must be carefully set to allow the rapier or shuttle to pass without abrading the flax fibres. A larger opening increases the tension on the warp threads, while a smaller opening rises the risk of mechanical contact with the filling insertion system.
Finding the optimal setting is critical for maintaining high efficiency in the weaving room.
Tension Effect
Exceeding the recommended opening distance increases the elongation of the flax yarns beyond their elastic limit. The warp shed height directly influences the frequency of warp breaks since linen has low elasticity compared to cotton or synthetics. This tension must be minimized to preserve the structural integrity of the yarn.
Height Adjustment
The calibration of the jacquard lifting mechanism is adjusted using the comber board height or by reprogramming the actuator strokes. Operatives must reduce the opening for weaker or low-grade linen yarns to prevent excessive yarn failure during high-speed production. This adjustment requires a corresponding reduction in the size of the weft insertion element to ensure safe passage through the smaller opening.
Proper synchronization between the shed height and the insertion timing maximizes the quality of the finished woven fabric.