Warp Change Efficiency and Preparation Turnaround
topic
Warp change efficiency measures the total time from last pick of the ending warp to first quality pick of the new warp, comprising beam transfer from preparation area, beam mounting, warp tying or drawing-in, pulling through, and tension equalisation, with target change times of 1 to 4 hours for standard looms depending on warp type, with improvement through beam transport automation, automatic tying machines, and optimised drawing-in procedures reducing change time that directly improves loom availability.
Role
Identifies the planned downtime reduction opportunity from warp change operations that are a major component of total planned downtime in weaving rooms with short warp lengths or frequent style changes, with warp change time reduction being the primary lever for improving availability in these operations and with the investment in automatic tying machines and beam handling systems being justified by the loom availability improvement from faster warp changes that increases annual fabric output per loom.