Attaching binding by machine is a three step process. First, stitch along the edge of your quilt, in just far enough to "catch" the layers (1/8 " or so). Then make sure you don't have any irregular sections outside the stitching. Next, lay your double fold binding on the backside of the quilt and stitch it down using a 1/4" seam. Lastly, flop your quilt over to the right side and with your binding to the edge of the stitching, stitch "just inside" this stitching (barely inside) and you will have a very neat top stitch that looks as well on the backside!