[QUOTE=DebbieJJ;8050450]Don't forget that the tension can and does vary from one quilt to another.....according to thickness of fabric, batting used, thread used, etc.
I agree totally with DebbieJJ that tension can vary from one quilt to another. I check the tension every time I do a quilt. I test the tension on the backing with a scrap next to the quilt on my Q'nique. If I use the same thread on both top and bottom, it is usually enough to have the turn knob flush with the end of the spool (hope that is the right word). I use the Jamie Wallen to make sure the bottom thread tension is correct first. If needed, I adjust the top tension. My favorite thread is the Glide brand for both top and bottom.
If using different threads or different thread weights on both top and bottom, I use the Jamie Wallen method (Google this online for information). This is when I experiment with the top tension knob until I find the right tension. It has worked for me every time.