Fibre Calibration
Precision sensing equipment determines the mean fibre length and the distribution coefficient within flax bales before the carding process begins. The almeter operates by passing a parallel tuft of fibres through a high-frequency field to calculate the capacitance change. Internal logic converts this raw electrical variance into length measurements that align with the standardized classification codes for long line flax.
Length Distribution
Sorting through raw material often requires identifying the specific proportions of short fibres versus long filaments because those ratios dictate the subsequent spinning efficiency. When the almeter records the data, the mill software generates a scan showing the percentage weight at varying length intervals. Technicians inspect these findings to verify if the lot meets the spinning frame settings established for a specific count of yarn.
Proper machine calibration depends on this data output to avoid excessive breakage during the drawing stages. Frequent shifts in raw supply necessitate repeated testing because the botanical nature of flax creates natural variances between different harvest years or growing regions. A high coefficient of variation suggests the batch needs extra combing before entering the roving frame.
Consistent measurements allow the factory to maintain uniform tension across the drafting rollers.
Acceptance Threshold
Buyer requirements define the exact length profiles permitted in shipments intended for high-quality woven linen production. Export contracts list these limits alongside the moisture content and trash percentages expected in each bale. Discrepancies between the mill grade and the buyer specification trigger a review of the testing methodology or a request for a secondary sample analysis.
These commercial agreements hold the weight of legal tender once the electronic logs from the device appear in the final trade documentation. Each report provides a permanent audit trail for the batch processing history. The almeter provides the only defensible evidence of fibre quality when quality disputes arise between the supplier and the textile mill.