Donnai, l teach fmq on a domestic machine at our sewing group in Fla. Thread breakage can be from tension too tight , but loops on bottom often means tension's too loose...so likely it's your computorized machine that's confused on what you're doing. It thinks you are sewing with the presser foot up. Depends on the model...so look up in your manual how to set the machine for fmq. Lowering feed dogs and putting on the quilting foot alone doesn't often work on the newest computorized ones. You may need to override the auto tension. Also, some require a spe ial bobbin case for fmq...Janome has one with a blue dot. Next, you may find your model actually does better with feed dogs up but stitch length set to 0.