I agree with Maniac. I have a 440 and wouldn't even try using a ruler. Even if you want to quilt curves, you can do it by marking the lines and using a walking foot.
Originally Posted by
ManiacQuilter2
I have an older Bernina 1530 and I wouldn't do anything that would damaged my baby. I don't understand this ruler bit. I tried using an Omni ruler to sew some straight lines It worked OK but keeping the ruler on the quilt while it is moving takes a bit of coordination that I just don't have. It is just as easy to mark the lines with chalk and stitch.