Hi Miriam, The bobbin winder isn't the greatest I'm guessing from the way it winds...It's a little soft and spongy and alot of crossover spooling. I really wasn't paying too much attention to the loop of thread from the beginning of the winding and apparently it created a real mess and getting stuck. After first getting the button to work I wasn't sure of where it was supposed to be for normal sewing. to the right? up? down? so I removed the bobbin and played with it to see what it actually did to the bobbin case. The button actually raises and lowers the area inside the bobbin case to engage it for winding. I also didn't have it all seated correctly. So after all my efforts last night I finally got it to sew correctly. Now I have to figure out a way to not have a bobbin that is softly wound on this machine.