I have a Janome 6500 and the thread cutter is a pain. When I use it and then start to sew again, the thread knots up at the back of my fabric and I have to use the seam ripper to pull it out. I have spoke to the president of Janome Canada and he can't seem to give me an answer as to why it does it or how I can fix the problem, so it is easier not to use it. And when I spoke to the store where I bought it and she used the thread cutter on her 6600, it did the same thing.