Long Arm Question
I have a question that has been nudging at me. I've been watching Donna Jordan set quilts up on their long arm and then watch it as it works. I've only see the top needle arm move across the quilt as it it quilting.
The question I have is: For a long arm, especially her huge one, is there a bobbin underneath? If not how does the thread catch to stay in the quilt. Or is there a different way a long arm places a 'bobbin' thread?