Pn8hall
WKR
So I just scored a Singer 15-90 at a garage sale and have been playing around with it but I keep running into issues with thread tangles underneath. I have played with tension settings a lot and cant seem to get it figured out. The top stitch seems good and I played around with tension to get bottom stitch looking good but seems that most passes I end up with a tangle underneath the machine. When I try to lift the piece out I end with 4 pieces of thread underneath. There is an extra piece of needle thread that seems to be looped around. I can usually manage to pull it out far enough to cut the threads and when I cut it I can then pull the extra needle thread out and and am left with a piece about 4 inches long in my hand. I am using some nylon upholstery thread with a 16 needle as per the recommendation of thread specs. Fabric is some old wrangler works pants I cut up that feels very similar to cordura or duck canvas perhaps. I tried a new needle and it did 3 passes just fine and then started tangling again. The green thread is needle thread and white is the bobbin. Any ideas what to try? I dissamebled and cleaned the tensioner, bobbin case, and shuttle underneath. Machine is oiled to specs. Its driving me crazy. I played with thread tension and bobbin tension. Thanks in advance Gurus!