Most of the binding feet are designed for adding bias binding to clothing; they are really not designed to handle quilts. Bernina used to have one for my machine (the 1240) that was supposed to be for quilts, but they discontinued it -- I think because it didn't work very well. Even when used for clothing -- say, to add bias binding to the neck and armholes of a child's dress -- the binding foot requires some practice to acquire a certain level of expertise using it.