The bobbin on your sewing machine provides the lower thread supply, allowing your machine to form stitches. Needless to say, if your bobbin isn't set up properly, your machine won't work. The bobbin on your sewing machine provides the lower thread supply, allowing your machine to form stitches. Needless to say, if your bobbin isn't set up properly, your machine won't work. Rather than risk that, we thought we'd ask for some tips from a nationally recognized home décor sewing expert. Donna…