Dr. Joy

I recently purchased a used MegaQuilter 18x8 on an Inspira frame with QBOT. When it was finally assembled (everything cleaned, oiled, leveled), I started to free motion quilt (waiting for version 3 of QBOT) using King Tut thread. The machine would take a few stitches and then I would have long stretches where the needle would punch through the fabric but not stitch. I read everything I could and then adjusted bobbin and top thread tension, quilt sandwich tension. I still had long threads on the top and the bottom. When my version 3 QBOT arrived, I began to experiment. Initially, the designs stitched with only a few long threads, but the more I used the program, the more the machine would continue stitching but the thread was not creating stitches. I have lovely needle punched designs but no quilting. My husband, who is mechanical and tech-oriented, did a thorough over-haul of the machine today and believes that I need to order a hook assembly. I'll order the part tomorrow but I was wondering if anyone has dealt with this kind of problem and how it was solved. Many thanks in advance for any help and advice.