Cross Width Profile
Lateral variations in warp end tension measured across the full working width of a loom beam establish the tension profile between selvages and the central fabric zone. Quantifying the warp sheet tension gradient helps mill engineers identify deflection in whip rolls or uneven warp beam winding in wide linen looms. Flax warps require uniform lateral tension distribution to ensure flat cloth formation and consistent pick insertion across the entire reed width.
Deflection in structural rollers creates a u-shaped tension distribution where central warp ends operate at lower tension than outer edge threads. This gradient parameter governs lateral tension distribution across active warp sheets and excludes longitudinal tension variation along the length of the roll.
Beam Alignment
Mechanical bending of long backrest rollers under heavy warp load reduces tension in the middle of the warp sheet relative to the selvages. Differential tension across the reed width causes unequal warp yarn consumption, resulting in wavy fabric edges and widthwise pick density variations. Multi-point tension sensor bars mounted across the warp sheet map lateral force profiles continuously during loom operation.
Technicians correct uneven profiles by adjusting crowned whip rolls, realigning beam flanges or adjusting spring loads on backrest mountings.
Selvage Distortion
Unbalanced lateral tension causes selvage tightening and uneven fabric stretching during wet finishing. Maintaining a flat tension profile prevents edge tears and ensures dimensional stability in finished linen rolls.
