I don't do anything elaborate. I fold the fabric once in such a way that I can cut strips the way I normally do -- which is simply to use a ruler or June Tailor shape cut mat, cutting perpendicular to the fold. I join the strips at the sewing machine. It's not necessary to cut thread between joins until you are done. There are some YouTube videos that show how to do this. It's pretty fast, but you do have to pay attention so you do each join correctly. Worst part is ironing the joins open and cutting off dog ears, but even this is easy if you have used a large enough piece of fabric so your strips are long; only a few joins are needed. I usually cut bias strips from a yard of fabric.