Sweets6181, I own a Janome 10001 and I went and looked at your machine and it is very similar to mine. I have experienced I believe exactly what you are going through and the problem is if you don't have that little black casing that holds the bobbin in the slot just right it will knot up every time. I feel that is what your problem is. Try taking the whole casing out and watch how you put it back in there. It has to fit just right. Try that and it may take a few tries to get it in there.