Originally Posted by
Tiggersmom
Clean out your machine . . Get all the fuzzy out . . Snip your top thread and pull it through your needle. Rethead your machine, flossing thread inbetween the tension disks,(put your tensions back to normal settings) make sure your bobbin is wound correctly and loaded correctly! Try on a scrap of fabric, adjust tension if necessary.
Good luck.
DITTO! I used 40 wt with all my quilting. There is also another issue that can cause this. The DISCs that the thread goes thru (the round discs) can get stuck. When you turn the knob, do the discs move? If not then manually move them with your finger tips......unstick them. Now try sewing again and see what happens.