Tonie Greenwood answered question 6/3/2011 I Have A Singer Model 9410. The Bobbin Case Will Not Stay On The Lip That It Rests On Below The Slide Plate. If There Is Any Tension At All On The Bobbin It Pulls The Bobbin To The Right Which Pulls The Bobbin Case Off Of The Lip That It Rests On? I have a problem with my 9410 model's bobbin. When I am finished threading eveything and start sewing my bobbin thread comes out and gathers like a grass skirt. How do I keep the bobbin thread from gathering so I can sew normally?