At a quilt class the instructor told us to take an ruled index
card and set the edge even with the right edge of the foot, set
the needle to sew perfectly down the line. This should measure
1/4 inch then set the needle one notch to the right. Works for
me. That way I keep the edge of the foot even with the
fabric.I sew pretty straight until my mind wonders......then its
time for ripping practice!