Need help with bobbin winder
I am trying to wind bobbins on my Federal sewing machine. When its engaged it does spin. Add a bobbin onto the shaft and it will start winding but the bobbin doesn't turn and the winder does. I am using the metal bobbins that comes with it. Could it be that either the middle of the bobbin is too large for the bobbin winder? The metal bobbins will wind on my newer Singer sewing machine. I don't want to keep switching machines just to wind bobbins. Thank you for your help in advance.