I think I've warped and dressed the rh correctly. All tension seemed even when I began. Now, a yard into the weaving, the threads on the selvedges are quite loose. This has happened with each of my projects since I got the loom 3 months ago. I know how to add some tension mid-project. But is there a trick to getting those threads to keep their tension. Here are some things I've tried/considered:
1. Could it be that pulling the shuttle through with a mop yarn as weft is yanking the tension out of the 3/2 cotton warp? It seems particularly bad on this project.
2. Tried tying smaller groups when tying to apron. Tried making the tension a bit more on the edge than the middle threads.
3. I've tried direct warping and warping on a board then transferring to the loom.
Any ideas or commiseration are welcome. Thanks.