Janome Memory Craft 9500 Troubleshooting

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 ...

ManualsLib https://www.manualslib.com > ... > Instruction book

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

Best video on tension

Perhaps this will help:

What causes thread eyelashes when sewing

Thread HELP eyelashes


http://www.generations-quilt-patterns.com/sewing-machine-tension-troubleshooting.html

i should know whether the loop is upside or downward, its opposite tension adjustment , if the loop is downward position, tighten the upper thread tension , if the loop is upward then tighten the lower bobbin tension

You can never used oil to any MC machine. it will damaged the sensore of your machine.If possible just open head cover and clean broken thread from the movable part.

check with janome for a manual
or
sewingpartsonline.com
sewusa.com
sew4less.com
sewvacdoctor.com
a1sewingmachines.com
youtube for a video

try sewing a wide zig zig stitch and check the stitch formation, is it catching on both sizes of the zig zag or perhaps only one side.

Timing out means that the timing sequence between the needle going down to its lowest point is not in sync with the rotary hook coming around behind the needle to catch the thread tail behind the needle eye.

You could also remove needle plate, sewing foot and bobbin, and hand wind the flywheel through a stitch sequence and watch the needle and rotary hook movements. When the needle is at its lowest point, the rotary hook should be right behind it.

Adjusting timing is not something I would tackle myself though, I leave that to the technician.

make sure your bobbin thread is in tension spring on bobbin case, if it is tighten your bottom tension.

upper tension/threading wrong?

If it was sewing correctly BEFORE the needle break...why did the needle break in the first place?...and what fixes did you make?
If it sewed properly...what changed?

Cut your upper thread close to the spool...make sure the presser foot is raised and pull the cut off thread section through/out of the machine from the needle area (sewing direction...do not pull the thread backwards!)

Clean out the bobbin area...remove any traces of lint or pieces of thread...look for any broken off needle pieces... brush the bobbin area out....then add a drop of sewing machine oil (but only if your manual says to oil that area).

Remove the needle plate to expose the feed dogs...brush/clean out that area too and add a drop of sewing machine oil...then secure the needle plate back on.
Replace the needle...do it again...yup...some needles arrive bad from the factory. Make sure the needle is inserted and positioned properly. Then thread the machine WITH the presser foot in raised position. (The thread needs to get seated into the upper tensions.)
..with the.presser foot down...thread the new needle.
Oh...and use the correct needle for the thread. (a universal 80/12 is standard).
Thread can cause issues too. Try a different bobbin, or maybe a different spool of thread to see if that makes a difference.

The solution that I found last night was the thread tension. I have never touched the dial, only had it set on 'auto." When I started playing with it, I realized the top thread should be really easy to pull through the machine and it wasn't. I started turning the dial (to 3 or 4) and the thread slid through the machine perfectly. No more birds nest! I really thought it was bobbin initially because of the horrible sound it was making.