I took off the plate and cleaned the lint out, don't know what else to do
Try changing the needle & check to see if the thread has come off the thread take up lever
SOURCE: Thread bunching and knotting under fabric
After talking to my favorite Bernina dealer... I discovered a fix for my machine. And I"m going to guess it will also be your problem. The hook has grooves worn into it. This either needs to be filed very hard to remove all of the grooves or you can purchase a replacement hook. By the way they only make metal replacement hooks and my machine has a plastic one. So this must have been a common problem. My husband just filed mine down considerably and it's finally working. I am still planning to buy a metal hook to have on hand. Hope it helps you! Lydia Jo
SOURCE: I have a Brother SE-270D
its the problem of the timing belt in your machine its extra loosen or extra tightned or is slightly came out of its position or finally broken.
as the machine is proper just missing the proper speed as it should be .
it is running continuosly as you stated.
check the timing belt and make it proper if its worn out and needs replacement this is how its done
There is an adjusting screw on the right side of the machine head. Follow the motor bracket to the machine head and loosen that big old screw or bolt which will raise or lower the motor giving you slack to remove or replace the belt.
feel free for further queries
thanks
SOURCE: bobbin thread bunches up creating a tangled mess under the plate
This could either be due to the bobbin being wound too loosely, or the tension on the top thread is too loose. This just happened to me the other day, and I thought it was the bobbin thread, but then I put another bobbin in with a different color than the top thread (this is a huge help in diagnosing thread issues), and I was surprised to find that it was actually the top thread that was a big loopy mess on the underside of the fabric. I fixed it by tightening the tension on the top thread (quite a bit), and everything was fine.
SOURCE: Upper thread knots up with bobbin thread when sewing a stich
Thread test
Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no mater how much thread you pull, your thread is good. If that your machine passes that test, then let me know, we can go to step 2. If not, try different spool of thread, same test until you get a smooth pull (tip: always check your thread this way when you thread your machine)
Step 2:
Pull on your threaded bobbin thread while it’s in the machine. Does it pull smooth and even? If so, go to step 3. If not, try a new bobbin (bobbins get bent or distorted if wound too tight).
Clean thoroughly in the hook and bobbin case area and oil 1-2 drop is all.
Thread knotting on the bobbin can be a lot of things but here's some guidance:
Tension:
If the thread is loose on the bottom of the fabric, it's actually the top thread is too loose. Think of 2 little elves playing tug of war in your machine, one on toip and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension)
Jamming bobbin case:
If it is damaged from turning out of place once, it could have rough spots on it that makes the thread hang on it, and keeps making it turn over and over. Use a finger nail board (fine sanding) and smoothall rough spots. Then reset the bobbin case taking care to put the notch in the bobbin case in alignment with the proper spot in the machine (basically 5 o’clock) when looking at the round area where the bobbin case goes.
SOURCE: thread knotting around bobbin case
hello, I had the exact same problem and could not find the solution until i took my machine to my sewing sensei and i solved my tedious problem. It was actually not a tension problem at all but a threading problem. Make sure you have threaded your bobbin correctly and that when you pull on the bobbin thread that the bobbin turns the right way. (mine must spin anti clockwise to work) Make sure that when you pull up the bobbin thread using the needle that it is not over the feed dogs connective bar but under it. A big problem when the thread gets caught around the bobbin case wheel is that the thread is looped around the feed dogs once and that causes the thread to get caught around the bobbin wheel. In conclusion, thread the bobbin correctly and read over your instruction book before spending the money to get it fixe in s shop.
fig.bobbins se up of thread.the thread should be clockwise rotation coming out to bobbins casing,insert thread on slot to acquired bobbins tension.after setting up you insert your bobbins on shuttle
follow the red thread set, try this on single straight sewing with dial stich set up to # 8 range to #17,Dial tension to # 3. use cotton/polyester foe sample sewing. try on hand maual sewing first several time before applying foot pedal to avoid needle breakage,43 views
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