How to fix tension? Janome 10000. Top thread looping on the bottom of the fabric.

Question edited for clarity.
Please don't type in all CAPS, it is considered SHOUTING and is harder to read.

Sewing machine tension is a delicate tug of war between the bottom Bobbin tension and the Upper tension to put the loop between the 2 layers of fabric. You set the Bobbin tension first and the the top tension depends on the fabric and the thread used.

Your Bobbin tension is very very loose to be not tensioning at all or the top tension is too loose.

Adjusting The Tension - Janome Memory Craft 6500 ...

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Janome Memory Craft 6500 Professional Manual Online: balancing thread tension, Adjusting The Tension. Correct Tension: The Ideal Straight Stitch Has Threads ...

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Check that top thread tensioner is engaging.

After threading top thread, with presser foot up, rotate tension selector to 4. Then move presser foot down (this engages top thread tensioner). Make a slow steady pull of the top thread. Compare tension to when foot was up (no tension) to foot down (selected tension). If you move presser foot up and down while slowly pulling the top thread, you should feel the change from no tension to selected tension.

If you find there is no tension on the top thread, the top thread will loop and nest on bottom side of fabric. Rethread top thread per machine instruction. If still no top thread tension, either the tensioning mechanism has failed or it has not threaded properly.

Once you have verified the top thread tensioner is working, you need to check bobbin thread tension. Make a slow steady pull on the bottom thread. You should feel tension similar to the top thread with tension selector set to 4 and foot down. If the bottom thread tension feels loose, similar to top thread presser foot up, then likely the bottom thread has escaped the bobbin case tensioner. Reload bobbin and recheck bobbin tension.

increase top thread tension so that it pulls the bottom thread up and stops it looping around the bobbin carrier

Pull a bit on those loose stitches and verify it is actually the bobbin thread that is loose. Usually, the looping is the top thread. As a general rule, if the thread problem appears on the bottom of the fabric, it's a top thread issue. If the problem appears on the top of the fabric, it is a bobbin thread issue.

If it is a top thread problem, try increasing the top tension. If it continues to create loops under the fabric, you need to rethread the top thread as follows:

Remove the top thread from the machine.
ALWAYS RAISE the presser foot and rethread from the beginning.
Then tweak the top thread tension until the top and bobbin threads meet in the middle of the fabric.

Increasing the top tension will bring the bobbin thread higher into the fabric. Decreasing the top tension will allow the bobbin thread to pull the top thread down into the fabric. You want a happy medium between the two. That is correct tension.

Sounds like a threading issue.
Be sure to install a brand new needle (every 8-16 hours!).
Remove the top thread completely from the machine.
ALWAYS RAISE the presser foot and rethread from the beginning. You may need to tweak the top tension until the two threads meet in the middle of the fabric.

This should take care of your problem. If not, you may have the technician look at it again.

Remember, thread problems under the fabric are usually top thread issues. Thread problems appearing on top of the fabric are usually a bobbin thread issue (or top thread tension being too loose).

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Usually, this occurs because the top thread is not fully seated in the tension disk.

Remove the top thread from the machine.
ALWAYS RAISE the presser foot and rethread from the beginning.
Reset your top tension to the midway point and then tweak it.

What causes Bird Nests Superior Threads

Birds nest under the fabric big loops of thread top side looks good...

If the loops are forming on the bottom it is the TOP thread tension you need to check. Make sure it isn't too loose. Also is the needle the right type and size for the fabric? Check the stitch out on plain cotton fabric if a tension adjustment doesn't fix it.

The TOP thread effects the UNDERSIDE of the stitch and the BOBBIN thread effects the TOPSIDE of the stitch :)

looping the material ( bird nesting) is an indication of incorrect needle thread tension before threading the needle pull the thread and there should be resistance to the pulling

The timing needs to be adjusted and if you are the original owner, this has to be done by an authorized Janome dealer to prevent invalidation of your warranty.

This is something that you should not attempt least more problems arise.

Hi,
If you are getting loops on the bottom side of your fabric then it is a TOP tension problem, usually the thread is not between the tension discs.
Here is a simple check: Thread the upper path and stop short of the eye of the needle. Drop the presser foot. Now if you pull on the thread you should feel the drag of the tension discs. Increasing the tension setting should make it harder to pull. Now while your pulling raise the presser foot. All tension should be gone and the thread will pull thru easily.
I have worked on a few Hello Kitty machines and usually there is a single screw to remove the nose cover, exposing the needle bar and slack arm assembly. The slack arm does just that, it takes up the loop and the tension discs keep it from pulling more thread off the spool. Look for some thread wrapped up in the mechanism and clear it if you can.
This is were I find most of the problems
Good luck!