I find a size 14 needle is too small for free motion. The torque you put on the needle is too much for a thinner needle. Try a 16 or 18. Slow down your needle speed and try speeding up your hands. You might even need to decrease the tension on your machine, but I would try the other two things 1st. It is matter of getting the right thread speed/hand speed/thread/fabric and batting combos. It is NOT intuitive for everyone and takes some practice and be prepared to be frustrated!
PS have you REALLY cleaned out the bobbin area? My machine gives me FITS when it gets lint behind the finger on the bobbin case (run a thin pin under it to flush it out!) , in the bobbin case or even between the bobbin race way and the stationary part of where the bobbin sits on the post. I even had the president of my machine system come to my HOUSE to work on my machine. As soon as he left, BAM shredding again. Took me a long time to find that glob of lint that was lurking in that bobbin race area.
Last edited by soccertxi; 07-25-2015 at 08:19 AM.