Weaving Defect Assessment
Stop mark severity quantifies the physical gap or density variance left in finished fabric when a loom stalls during the production of linen textiles. Mechanical slippage in the tensioning assembly during a restart forces the weft yarns to accumulate at the precise point of pressure loss. Inspectors grade these flaws on a scale from one to five based on visibility against backlighting and the structural impact on the textile grain.
A level one classification denotes a faint shadow that disappears upon dyeing while a level five rating signals a permanent distortion requiring the removal of the affected yardage from the roll. This measurement provides the technical basis for discarding or down-grading cloth before it enters the finishing house for bleaching or sizing.
Loom Integration
Every automated weaving machine records the exact moment of a shutdown in the digital log of the control unit to allow supervisors to correlate the time of the event with the physical defect found on the cloth. The sensors detect a stall when the warp shed remains open for a duration that exceeds the threshold programmed for the specific yarn count and flax variety. Operators adjust the take up mechanism to compensate for the slack that enters the system whenever the drive motor cycles off unexpectedly.
Accurate calibration of these sensors ensures that the stop mark severity remains within the tolerance band agreed upon by the mill and the buyer. Factories identify these pauses through the shift reports generated by the loom monitoring software. A high frequency of pauses correlates with brittle fibre bundles failing under the strain of high speed shuttle action.
Tolerance Verification
Quality audits assess the total length of fabric between the defect and the cut line to ensure that final goods meet export standards for apparel production. Linen buyers reject shipments where the damage density exceeds the threshold defined for high grade shirting or light garment weight cloth. Standard protocols demand that inspectors count the number of missed picks within a fixed centimetre window to derive the final score.
Excessive mark density forces the conversion of premium export stock into secondary industrial applications. Lower grades of linen tolerate higher defect counts due to the application of heavy coatings that hide surface irregularities. A recorded score defines the final price of the cloth lot.
