Warp Alignment and Leasing for Tying
topic
Successful automatic warp tying requires precise alignment of old and new warp ends in corresponding positions, achieved by spreading both warps on parallel lease rods that separate individual ends and maintain their sequence, with the tying machine clamp frame aligning the two warp sheets at the correct spacing for the pick-up mechanism to reliably select corresponding pairs, and with incorrect alignment being the primary cause of wrong-end tying errors that produce weave pattern defects requiring manual correction.
Role
Establishes the prerequisite physical condition for automatic tying accuracy by ensuring that corresponding old and new warp ends are positioned for reliable machine pick-up, with leasing quality and warp alignment being as important as tying machine mechanical performance in determining tying accuracy, and with colour-coded lease rods and end identification systems helping operators verify alignment before tying commences to prevent systematic tying errors from misaligned warp sheets.