Tying Limitations and Conditions for Full Drawing-In
topic
Warp tying is limited to repeat fabric constructions using the same threading, yarn count range, and end count as the previous warp, with style changes requiring different threading, reed, or shaft count mandating full drawing-in, and with coarse-to-fine yarn count changes exceeding the heddle eye size range requiring heddle exchange before tying, making the proportion of warps requiring drawing-in versus tying a function of the style diversity and batch size distribution of each weaving operation.
Role
Defines the operational conditions under which tying provides its productivity advantage and where full drawing-in remains the necessary approach, with the balance between tying and drawing-in frequency governing the total warp change time investment in weaving operations and informing the economic justification for investment in automated drawing-in machines versus automatic tying machines based on the specific style diversity profile of each weaving department.