After about an hour of sewing on my Janome Memory Craft 4000, the thread begins bunching on the underside of the fabric and gets increasingly worse. There is also a terrible racket coming from the bobbin case area that gets progressively louder. What I have done so far: had the machine completely serviced by an authorized dealer in Sept. 2007. I had only minor stitching problems before service. Machine sewed fine under sporadic sewing conditions until this week when I began sewing with a deadline on quilted art projects. These are linen or silk over flannel so I'm not asking the machine to do heavy duty sewing. Monday I took the machine into a sewing machine person who adjusted the tension top and bottom. It worked beautifully about 3 hours. Then the problem began all over again. I turned the machine off for the night and it is stitching a little better this morning, but it is still noisy and I predict that it won't take much sewing before the thread begins bunching on the underside of the fabric. Help, I have a big deadline and need my machine. Short of throwing it into the river or buying a new machine, what can I do? Thanks, Sandy
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