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Coming out? You mean thread breaking? This is always incorrect threading or incorrect tension, or rotten thread.
The videos explain how to set the bobbin tension first and then as long as your threading is okay, any other adjustment is done on the top tension. Bobbin tension only needs very small adjustments and is just enough to stop the thread from falling under the weight of the bobbin.
When you change thread, are you using the same brand of thread and thread weight? A heavier or lighter weight thread will affect the bobbin tension. Otherwise, perhaps the bobbin case is worn. Look for a replacement bobbin case.
You're saying the thread on the bobbin is loose/sloppy? That would be a result of the tension placed on the bobbin during winding. Make sure you are using the correct threadpath to wind the bobbin, or the winding tension needs to be adjusted.
Remove the thread from the machine. ALWAYS RAISE the presser foot and re-thread from the beginning. Verify that the thread follows the correct path. Set the upper tension to the midway point between high & low number.
Re-install the bobbin (make sure it turns the correct direction in the bobbin case). Thread the bobbin thread through the bobbin tension.
Have you replaced your needle first. Sometimes simply a new needle will do the trick. That Juki being a straight stitch only machine make it simple. When the needle reaches its lowest point and then starts back up about an eight of an inch. The point of the hook should be slightly above the eye of the needle and be directly behind the needle shaft.
first clean bobbin case loosen thread tension screw and clean under tension spring, hi pressure air is the best. its important to clean under tension part because material builds up and does not allow the flat spring to put the proper pressure on the bobbin thread. tighted tension (second screw) accordingly. all thread tension depends on thickness of goods being sewn. the heavier the good the more tension u need on top.
Hi LJ,
Look on the bobbin case, and see if there is a small screw. Usually that is the tension of the bobbin. You can adjust that until there is only slight tension on the bobbin thread.
Hope this helps
Joe
Juki TL-98Q
Loading the bobbin into the bobbin case:
Snap in the bobbin case latch, and put the bobbin into the bobbin case so that the bobbin runs clockwise.
Passing the thread through the **** of the bobbin case, continue passing it under the thread tension spring, and pull out the thread open end about 10 cm from the bobbin case.
Insert the bobbin case fully into the hook, and close the bobbin case latch.
You can obtain a copy of the manual in pdf format for free at:
http://www.juki.co.jp/household_en/pism/img/tl98q/download/98qim.pdf
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