If you marked the intersections correctly and sewed the seam line correctly, you will be cutting in a spiral and end up with a lovely strip of continuous bias tape. I had a comprehensive sewing manual which had the basics but I got lost along the way and then found a YouTube video which had me confused as well. Mar2, you can definitely do this with a fabric square up to 40". I was taught the mark of a good binding is all seams go the same direction. This was my third reference on my first attempt at continuous bias binding. Quilts, on the other hand, seems to be more straight-forward:
How to make continuous bias tape in one long strip
Calculating Continuous Bias - The Sewing Loft
I need a couple of miles of bias tape well, that IS a bit of an exxageration, but I do need a lot , and I knew that I had made enough bias for a bedspread yrs. I had been looking for this method. You just feed it into the foot, place your main fabric into the centre slot and start sewing. Plus you need enough for the seams, corners of the quilt, and joining the binding at the ends. You can see it at sewingwithbrigalidbyestela. There are so many different uses for a stripe of continuous bias. Brilliant — thank you!
It comes in very handy when making lots of bias tape to bind a quilt or make piping for the cushion of a chair. So shortly after I learned this method, I decided to combine the two methods. Use straight or decorative stitches on your fabric and then cut it into continuous bias. Christina Patzman talks about which types of lining are appropriate for various fabrics. Thanks for sharing on my Grandma Ideas Sharing Time link party.