Posted by Susan on Friday, 2 May 2008, at 5:05 p.m.:
In Reply to: weaving question posted by Jo Ann on Friday, 2 May 2008, at 8:52 a.m.:
When you warp front to back, you are starting out with threads that may or may not be the same length, because they've been cut and then pulled this way and that when threading, then when you wind on, these threads can knot up in front of the reed, straining some and not others.
Secondary to this, if you do not wind on with the warp tensioned adequately and evenly on the beam, threads will act up too. If you do the "crank and yank", with sticks or heavy (very heavy) paper
you should be able to overcome this. I make sure I wind on with the same tension the warp will be under when weaving.
Many front-to-back warpers wind on through several lease sticks to even out tension too, though this may present a problem with hairy yarns.
Of course your weave structure may have something to do with it... lace-weave stripes are notorious! The take up in the lace sections is much different than the plain weave areas. I did place mats once with plain borders, which "grew" in length much faster than the lace center. The result was ruffled selvedges. They turned out to be just fine for checking the oil...