Drawing-In Error Detection and Correction
topic
Drawing-in error detection before weaving uses visual inspection of the threaded warp under tension, comparison of threaded end sequence against the draft plan using end numbering systems, and test weaving of a short length on the loom that reveals threading errors as weave pattern violations, with correction requiring removal of incorrectly threaded ends and re-threading through the correct heddle and reed positions, with each error correction adding 15 to 60 minutes of loom downtime depending on the error location and fabric complexity.
Role
Prevents the production of defective fabric from threading errors by identifying and correcting mistakes before significant fabric production is committed, with systematic drawing-in verification being economically justified by the ratio of error correction time before production to the loom downtime and material waste from discovering threading errors after fabric production has revealed the defect in multiple metres of cloth that must be scrapped.