For samples, baby quilts and charity quilts, I often do my binding completely by machine.
• Pin binding to BACK of quilt, raw edges of binding to outer edge of quilt.
• Sew binding to quilt, using a ¼” seam.
• Fold binding to FRONT of quilt. Press the binding lightly. No need to get a knife edge – you just want the binding to lie in position. Do make sure the miters on the corners are pressed.
• Choose a thread for the top which contrasts with your binding/top if you want the stitching to show or a matching thread if you want the stitching to blend. The bobbin thread should blend with your quilt backing.
• Using a decorative stitch, sew the binding down by machine. My favorite stitch is the zig-zag stitch which has 3 stitches in each leg of the zig. I also like to use a buttonhole stitch. I don't like to use a straight stitch because it can be difficult to keep it a consistent distance from the edge of the binding.