when i got my new Janome 6600 and i was trying to do a serpentine stitch-it would sew a stitch or two and then sew in place. I had tried this stitch when i got it b/c it was one of the reasons i wanted this machine. well it turns out i had the wrong throat plate on the machine. i had forgotten that there was two plates. DUH!!! I even took it back to the dealer and she set it up and looked at it and told me i had the wrong plate. i was so embarrassed.