I have never seen my machine do this in my 15-20 years of sewing on it. I've cleaned it and oiled it, switched out with three different needles from three different manufacturers (and yes, they were all the proper size, I inherited an obscene collection from my grandmother). I've tried three different threads in both bobbin and spool, and re-threaded it several times. I checked the timing, it's where it should be, and the thread loops around picture-perfect... and then I put the fabric in, put down the presser foot, and stitch. It won't pick up but one in every handful of stitches, and occasionally breaks the top thread. The tension doesn't feel tight enough to cause these issues, but it's an old machine. Any ideas?
ranerdis posted on 10-16-2012 at 11:35 PM:
Mine was doing this for a while last year. Well, it was switching between doing this and making the stitches so small that the fabric couldn't move. My problem turned out to be that the bobbin wasn't, for whatever reason, winding tight enough when the machine did it. I fixed it by winding my bobbins by hand. I'm not sure if that's what's happening here, but you could try it...