No bobbin tension

Questions Iris. 1. Are you using the correct bobbins for this machine? 2. Are you following the manuals directions exactly? 3. Before you thread (top) ur machine, are you releasing the thread tension by raising the tension lever? 4. When you wind your bobbin, are you following the threading diagram in the manual? 5. Have you broken off any thread in or near the tension disks? If so, tiny threads may be stuck between the two disks. Lastly, Part of the problem, quite frankly, is that these less expensive machines are finicky. And part of the problem is that most manuals are not detailed enough. Go over each of my questions, then get back with me.

hi Sue.
Why does my bobbin thread keep bunching up? Check Your Tension Settings. Looping underneath the fabric usually occurs when there is not enough tension in the needle thread to pull the bobbin thread. Sometimes thread bunching can be caused by something as simple as the tension dial being inadvertently turned.
Sewing Machine Thread Bunching Up Here Why .
if you go to this link a little pop up will come up just close this down.
or try this one.

How to Fix that Tangled Nest of Bobbin Thread Under Your Sewing
or read up more at this link.
Why does my bobbin thread keep bunching up Google Search

Besides the other advice here, check your bobbin case. At first I didn't get my thread hooked into the bobbin case properly and had problems that looked like the bobbin tension was not adjusted properly. I have to take the case out, put in the bobbin to make sure it's caught properly and then put it back into the machine. This is what worked for me.

The problem is never the bobbin when you have this problem. It's the top thread. Take the thread off the top of the machine and rethread the top. Make sure the small tension dial is on 4 or 5 (the larger dial on the front left is for the pressure on the foot, not the thread tension.) After you thread the machine, put the pressure foot down but NOT on the thread. Then pull gently toward the back of the machine. When you do, the needle should bend slightly backwards before the thread comes through the machine. If it pulls with no resistance you could simply have "fluff" or remants of thread between your tension discs. If you do, put the dial on zero and using an old needle, clean between the discs and try threading the machine again with the "pull test" I described earlier.
No tension on the top of the machine, lets the bobbin tension win and it pulls all the thread to the bottom of the fabric.

You might remove the bobbin assembly looking for a broken tension spring (maybe a piece of it lying in the bottom the bobbin case.

That usually indicates a total loss of upper thread tension.

Take the bobbin out, un-thread the machine and start over.

Place the bobbin back in to the bobbin case, making sure to follow the illustration on the bobbin cover.

Then, with the presser foot up and the take-up lever in the highest position, re-thread the machine.

The upper tension dial should be set on 4 or 5.

Hi, you shouldn't need to change the tension on your machine. But it's always a good idea to make sure it is set correctly. Look in your manual for the recommended tension setting, and make sure that is where your tension is set. If you don't have a manual, the default tension setting for most machines is between 4 and 6.

If you are suddenly getting loops when you sew your seams, it is usually caused by one of three simple problems. The most common is that your machine is not threaded properly.

But, when your sewing machine suddenly goes "wonky" - try these step

1. Raise your presser foot and rethread your machine. Always remember to raise the presser foot when you thread your machine! When you raise your presser foot, the tension dials are released; when you lower the presser foot, the tension dials close around your thread. If you happened to leave your presser foot up when you finished sewing yesterday, the thread could have slipped out of the tension dials, so when you started sewing today, you got loops. And, sometimes, your sewing thread can shift out of position along the thread path and you can't see it. Trust me on this - I often need to rethread while I'm sewing, and I have an expensive machine! If your machine is new to you, it is always a good idea to refer to your manual the first few times you thread up - it is really easy to miss little things, even for advanced sewers.
2. If you are still getting loops after rethreading your machine, remove your bobbin and reinsert it. Make sure you know which way your bobbin need to be inserted. After you re-insert your bobbin, sew another sample seam. If you are still getting loops...rewind your bobbin (you can put your bobbin where you normally put your sewing thread and wind the bobbin thread onto a new bobbin). Never wind more than one color on a single bobbin. When you look at the thread in the bobbin, it should be straight a tight. Yesterday, I wound a bobbin, and the thread was kind of wavy and loose. Don't know why, but it happens.
3. Change your needle.
4. Check your manual - most manuals have troubleshooting tips in the last chapter. If you don't have a manual for your machine, search on google. You might be able to find one online.
   
5. If your machine is new, try calling the manufacturer or check their web site. They might have troubleshooting techniques specific to your machine.
   

If this doesn't help, please write again and describe your problem in more detail. Did you buy a used machine? Do you have your manual? Did you start a new project or continue working on the project you started when the machine was working correctly? Hope this helps! Ginny

Use a bigger spool stopper to keep the thread from catching in the **** on the thread spool.
sewman7

Found a solution to my own problem.... hope this helps someone else. Make SURE the bobbin case is seated correctly! (follow the instructions carefully). Don't put the cover back on right away after you put the bobbin case in. First check and make sure it doesn't move when you turn the hand wheel.
Also, when threading the bobbin make sure the thread passes down through the tension adjusting spring of the bobbin case.

1. Make sure you are using the correct needle and thread for type of fabric and it is installed correctly. Make sure bobbin is threaded evenly. 2. Tread path - make sure the machine is correctly threaded. Then, with your finger, feel for burrs, nicks or roughness on any metal parts that contact the thread. Open the slide plate, remove the bobbin and inspect the bobbin case and hook. Remove the needle plate and examine the needle hole. Sand any rough areas with fine emery paper and blow away grit. If burrs or nicks remain on the needle, presser foot, needle plate or bobbin case, replace them with exact replacement parts, if they remain on the thread guides, take-up lever, bobbin hook or tension regulator, take the machine for professional service. 3. Loosen thread tension by adjusting tension dial. 4. Clean feed dog, bobbin case, and tension discs. Unplug the machine. Use a small, stiff brush to wipe dirt and lint off the machine head and the needle bar area. Raise the presser foot and the needle to the highest position, open slide plate and remove the bobbin and needle plate. brush away dirt and lint from the feed dogs and bobbin case and remove any tangled thread with your fingers. Use a soft cloth to clean between the tension disc on the tension regulator. 5. Also check tension on presser foot