Jacquard Threading and Harness Preparation
topic
Jacquard harness threading connects each warp end through an individual heddle and mail on its dedicated harness cord connected to a specific Jacquard module hook, with harness capacity from 400 to 10000 hooks determining the maximum weave repeat width, threading sequence programmed from the fabric design file downloaded to the Jacquard machine controller, and harness assembly preparation including mail replacement, cord replacement, and tension equalisation requiring specialist skills and significant preparation time before drawing-in commences.
Role
Enables the individual end control required for figured woven fabric production by connecting each warp end to an independently controlled hook whose raising or lowering programme creates the design pattern, with Jacquard harness preparation and threading being the most time-consuming warp preparation operation that makes Jacquard fabric production most economical in long runs where harness preparation cost is amortised over maximum production length before the next design change requires rethreading.