Originally Posted by MamaBear61
Usually when my Pfaff starts sounding a little rough it is either asking for a new needle or the finger on the bobbin is in need of oil. I have a 7550 that is the only place that you oil it.
I also have a Pfaff 7550 and it does sound rougher than my Bernina 1530. I have had it checked and nothing is wrong, it just sounds loader than the Bernina.
It is true, you have to keep it clean, keep the hook oiled and change the needle often.