When you begin weaving you might discover crossed warp threads.
When you make a shed, you may see one or more threads sitting in the center of the shed, and you can’t tell whether they belong in the top or bottom layer of warps. Check first to see if it’s a loose thread sagging into the shed. More than likely, it’s a crossed warp thread.
You can quickly tell if a crossed thread is the problem by reaching into the open shed and feeling for any tight warp threads, which indicate crossed threads. If the threads are crossed in any way, they won’t weave and eventually, will impede your weaving. They must be corrected; the problem won’t go away.
It’s most likely that two threads have been crossed between the heddles and reed or among the heddles. Look behind the reed to see if a thread is crossing over an adjacent thread. See Figure A. This problem results when you sley the reed with two or more threads in improper order.
|Threads may be crossed in the heddles, too. Look carefully, because it’s harder to see crossed threads in the heddles. See Figure B.
To correct the problem, untie the knot on the apron rod or cut the crossed threads and rearrange them in the correct order. If there is a little bit of cloth woven already, you’re in luck and don’t have to untie the knot on the apron rod. Follow the threads you are going to rearrange as far back into the woven cloth as you can and cut them at that point. See Figures C and D.
|It will give you enough thread to put on a pin like a cleat to re-tension them after repositioning. See Figure E.
The above tip is an excerpt from: