Originally Posted by Mo_Chride
I was also told that longarmers won't take trimmed quilts and the UFOs I have are trimmed down to the correct finished size.Tara
The backing and batting needs to be 6-8 inches larger (length and width) then the top - on a longarm the quilts creep from the quilting and we need something to attach to the leaders on the frame. You could add a bit of different or same material to two sides (different adds interest to the backing) to get it the right size.
On your bobbin - I only quilt on a longarm, so I would say that you are getting backlash - that is when the bobbin is spinning (twice as fast as the needle is going), you slow down and the bobbin keeps going too fast, giving you too much thread creating a nest. There is a little disc called a Bobbin Genie that you add to your bobbin case and that helps your bobbin to respond better to changes in speed of sewing and prevents backlash.
Hope you get this figured out...frustrating to the max when quilting doesn't go right!