You've probably done this, but are your feed dogs down when you are FMQ? You don't have to have the same size thread in bobbin and top. But, make sure if you are using a heavier thread in your bobbin, you might need to adjust the bobbin tension. If the bobbin tension isn't right, you'll never achieve a good stitch. Don't be afraid, it's OK to change your tension on top and in the bobbin, that's why we have knobs and screws on our machines...so they can be adjusted. Also, make sure your needle is the right size for the thread.
If you are using different threads (and you should) you might have to adjust both bobbin and top tensions. But, the results are great.
Ricci
Last edited by QuiltnNan; 07-05-2013 at 02:23 PM.