Bobbin thread tension is good. When I pull on the thread with the bobbin case in my hand it stands up and thread pulls out.
Its the top tension that is giving me a major headache! I had looping on the bottom of test piece so I tightened the top tension. Rethreaded top thread, rewound a new bobbin, still have issues with looping on the bottom. Tightened the top tension so tight that it pulls out very tight. I still have looping on the bottom of my test sample. I'm using So Fine thread on top and in the bobbin. I'm out of ideas of what to try. Help please.
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