- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Is it really the bobbin thread that is globbing? Check closely. Usually it is the upper thread accumulating under the fabric.
If it is in fact the bobbin thread, then the bobbin case is not threaded correctly, the bobbin case tension needs adjustment, or it is broken and needs replacement. There are web sites and YouTube videos that show how to adjust the bobbin case tension.
QUICK FIXES: Remove all the thread from the machine. Clean the area around the feed dogs and bobbin area. Oil as instructed in the owner's manual using ONLY fresh, good quality sewing machine oil (only 1-2 drops each spot). Install a brand new needle insuring it is installed correctly. Avoid using fuzzy, old, or bargain bin thread. Rethread: Be sure you raise the presser foot BEFORE threading the upper thread so it will seat properly in the tension disk--and check to make sure you are threading the machine correctly. Check that the upper tension is set properly (the factory standard is usually the halfway point between the high & low number on the selection). Test on a scrap of the fabric you wish to sew. Adjust the upper tension--either tighten to pull the upper thread toward the top of the fabric, or loosen to pull more upper thread down.
If you're getting the bunching of thread on the bottom of your fabric, make sure that you have the machine threaded properly on top. If you pull the thread through the needle with the foot up, you feel little or no resistance. If you put the foot down, the thread should become harder to pull and the needle will bow. If this doesn't happen, the upper tension is not working correctly or is too loose.
I had similar problems when I first started sewing. Try adjusting the tension in your thread - less tension for lighter fabrics, more tension for heavier fabrics. This will stop the needle from pulling the threads in the fabric.
As for the thread getting bunched up in the bobbin - this is most likely because your bobbin is the wrong size for the machine, or that you did not thread the bobbin properly. Try re-threading, this time making sure you pull the thread into the bobbin container tightly. This should stop the bobbin from jumping around the container and spitting thread.
Make sure that there is tension on the thread when you have passed it through the tension unit, by making sure the presser foot is down, and then gently pulling the thread to feel tension. If there is no tension, as seems to be the case, check the tension discs inside the unit to make sure that there is no debris stopping them from closing.
Take the thread off the top of your machine and rethread it. Anytime a sewing machine bunches up the thread on the bottom the cause is the top thread. Make sure the tension dial is on "5". After you thread the machine, put the pressure foot down,(like its resting on fabric, but not on the thread), and pull the thread towards the back of the machine. It should be somewhat tight. The needle should "bow" slightly before the thread comes through the needle.
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.