I am very new to weaving.I have taken one class but it was on a table top loom and I have a Union Rug Loom.I started warping it a while back, way before I took the class.Long story, but now that I am back home I really want to start weaving.What I need to know is, is there a set number of threads for a warp? I want to make rag rugs.Thanks for any help you can give.