To wind the bobbin you put a spool on the pin at the bottom right corner. Run that thread through the little thing next to it and up - there is a thing with a wheel - on the opposite side of the wheel is a spindle you can put the bobbin on it, run that thread through and push the rubber wheel against the balance wheel and you are good to wind the bobbin. You can release the clutch so the needle won't move. Just give the knob inside the balance wheel a turn and you are good to go. When you are done you can just put the wheel back where it was and the needle will go again. You can make the next bobbin while you are sewing. Just keep the balance wheel engaged as you wind it. I had no manual when I got the one out of the trash. It took a while for me to figure out all the stitch patterns. Be sure to read that part carefully in the manual.