I used to get a good roll hem (they showed me how at the shop), but I didnt use it for a while and now cant get it doing one properly. I must be forgetting to turn a knob or something. I think the little switch by the presser foot goes back rather than forward posistion but not sure what else to do. I hope someone else can answer this for us, cause I dont have my book - so its guess work at the moment.