All medium and fine counts and all blended yarns with polyester components should be wound on automatic winding machines like Autoconer, Murata, etc. In choosing optimum clearing settings, indiscrimate removal of thick places is not desirable since removal of each fault is replaced by another fault namely a knot. Knots act as sharp instruments on the adjacent threads, besides being responsible for peak tensions generated during weaving. Tail ends of knots come in the way of clear shed formation and can be a cause of multiple breaks. Hence, each thick place is to be assessed with respect to its length, and only objectionable faults may be removed. This is possible only with electronic yarn clearer in conjuction with Uster Classimat which classifies yar n faults into twenty one categories (reference length & C.S.) The size of the tail ends of knots should be small. The knotter is to be selected based upon the yarn number. A spliced yarn gives good results. It would be desirable that a splicer is provided instead of a knotter on the winding machine to give good results and to get rid of all the disadvantages of knots. A large no. of automatic winding machines are equipped with knot / splice tester which ensures 90-95% prefect joints.