This machine most of the time sews fine except that on some ocaisions
intermittently it will bunch up the thread underneath the cloth. I
removed the bobbin case and noted that there are two small screws on
this case. One is in a round hole and the other is in an oval hole. I
found that the screw in the oval hole was not tight. There is no
provision for any adjustment from side to side on the small piece
inside this case that holds the bobbin thread however it is possible
to tension the thread depending on how tight you tighten this screw. I
don't think it is supposed to be tightened all the way because when I
did that and tried to pass a thread through it would not go through.
I had to loosen this screw about one and a half turns to let the
bobbin thread slip throught the slot and then hook. I'm not familiar
with this adjstment,(if it is an adjustment). Could this be the cause
of the thread intermittently bunch? Can anyone please help me with
this? Also is there a more appropriate news group that I might try
that is dedicated to sewing machine repairs? Thanks, Lenny.