Some machines can even backstitch with the walking foot, so you might want to find out. Mine does it beautifully which is nice for some things.
As Dayle said, it might occaisonally work your needle screw loose. I have had that happen. Sadly, I'm such a good I didn't notice for a few sections of chain piecing and then I saw it was not sewing. I didn't even look at anything just pulled out the bobbin assuming it was empty again. For a few seconds when I saw that bobbin with thread on it, I just couldn't imagine what was wrong. Nothing like sewing without a needle to make a girl feel dumb!
Last edited by Lisa_wanna_b_quilter; 11-07-2012 at 08:21 AM.