SOURCE: Bobbin thread breaks
Make sure your bobbin thread is turning clockwise as it sits in the bobbin case. There is a screw on the outside of the bobbin case you can turn with your thumb slightly to adjust tension. If you dangle the case from the thread and give it a light ****, it should move down slightly when doing so-an indicator of good bobbin tension.
Posted on May 20, 2008
SOURCE: pfaff 7570 bobbin tension
Check this link, it is threading diagrams, hope it can help you.
Posted on Aug 09, 2008
SOURCE: Bottom (bobbin thread) makes loops
I don't have the same brand as yours, but on my machine there is a little screw on the bobbin case that you tighten to increase the bobbin tension. If you've got one, turn it 1/8 to 1/4 turn at a time.
Posted on Jan 24, 2009
SOURCE: thread or bobbin tension
Thread tension. Beware of adjusting the bobbin screw. Pfaffs maintain their tensions just fine without adjusting the bobbin tension, unless you're using some crazy thick or fine thread. If you must change your bobbin tension, you would be well-advised to buy an extra bobbin case, because re-calibrating your tensions after changing them can be less than fun.
Increase your top tension, and your looping should cease. I normally keep my tension around 4.5. Also make sure you're using a good quality thread, and that there's nothing in the upper tension assemblies. Sometimes a tiny piece of debris can keep the top tension from applying enough tension, so turning the machine off and blowing some canned air in there can help as well.
Good luck,
-R
Posted on Mar 11, 2009
SOURCE: can not get thread tension on hobby 1200 grand
Adjusted the dial to the right until the stitches we better.
Posted on Dec 27, 2009
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