Jacquard Repeat Length Priced as Card Time and Loom Hours
Pricing Jacquard repeat length requires balancing flat card preparation fees against loom hour rate increases caused by harness mass speed penalties.
Card Time Calculation
Production Metric
Mathematical determination of the duration required for a specific volume of flax fibre to pass through the carding machinery establishes the workflow for spinning mills. Efficient card time calculation allows managers to synchronize the output of the carding room with the requirements of the drawing and roving frames. Without this data, the mill faces bottlenecks or machine idling that increases the cost of the semi-finished sliver.
Processing Throughput
Calculation of the time needed depends on the feed rate of the raw flax and the cylinder speed of the carding unit. Operators adjust these variables based on the grade of the fibre and the desired cleanliness of the web. Higher speeds may reduce the processing interval but often increase the breakage of the delicate linen fibres.
Constant monitoring ensures the throughput remains within the tolerance levels specified for high-quality yarn production. Precise timing allows the mill to maintain a continuous flow between the scutching and spinning departments.
Operational Efficiency
Scheduling the maintenance of the carding wire relies on accurate records of the accumulated running hours. If the card time calculation reveals a drop in output per hour, it indicates that the teeth on the cylinders are dull or clogged with waste. Regular adjustments to the processing schedule maintain the health of the machinery.