Backrest Height

Shed Geometry

Raising the guide roller increases the downward force exerted on warp yarns when the heald frames divide the sheet into upper and lower layers. Lowering the same assembly reduces that angular deflection, softening the mechanical stress placed on unevenly spun linen yarn. Weavers adjust this parameter to prevent excessive warp breakage when transitioning from coarse experimental batches to fine commercial damask production.

Improper positioning creates uneven tension across the width of the cloth, resulting in structural defects that emerge during subsequent wet finishing operations.

Quality Clearance

Mill inspectors record final compliance metrics within the production log before raw woven linen proceeds to bleaching and dyeing lines. Specifications maintained by the mill outline acceptable tolerances for warp alignment, while buyer acceptance criteria dictate the maximum allowable variation in fabric hand and tensile strength. Deviations traced back to improper loom geometry halt the processing batch until mechanical adjustments restore standard output parameters.

Finished cloth passes the final technical audit only when surface regularity confirms that loom mechanics operated within strict mechanical limits.