Pre-wound bobbins ????

Question

You're not embroidering with the Bernina Artista 180 by any chance?  I have had the EXACT same problem.  I even tried solving the problem by tightening the s***w on the bobbin case.  This is where a Bernina dealer can be LOUSY, in the problem-solving department.  If so, let me know and I will tell you how I solved the problem. -Rebecca