First things first, pull that stuff apart and clean it. Thread, fabric and life in general cause dust and debris. My juki quilting machine is so picky and hates any amount of dust. Make sure theres no thread or lint under your plate, caught in any important larts, etc.
Second thing is change your needle.
Third rethread the machine
Fourth rethread the bobbin.
FYI: clumping thread or stitches showing (outside the norm) on the bottom of the fabric means a problem with your top thread. Clumping thread or stitches showing on the top means a bobbin issue. Make sure when you rethread the top, your thread goes on the correct side of the tension plate and that it falls all the way to the end of your take up lever and catches in the levers hook on the end. Mine ocassionally slips back and causes problems. Usually retreading takes care of it.
Keep in mind old thread can throw more dust, as well as cotton thread. Fleece is especially dusty.
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Last edited by McheleM; 07-09-2013 at 10:29 PM.
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