Thread bunching on bottom! Only doing it when sewing heavy nylon webbing. Doesn't matter the thread or bobbin or needle (already switched out). Sews fabric fine. Was working fine days ago on same webbing and thread. Cleaned out machine, didn't help ...
How to Sew Webbing: 12 Steps (with Pictures) - wikiHow
Cut webbing at a 45 degree angle — Alpine Savvy
How to Sew Webbing: 12 Steps (with Pictures) - wikiHow