Why does lower looper thread keep breaking?

here is a video

Try removing thread #3 from the tension altogether. If this doesn't work, then try using a different spool of thread. Some break easier than others. If this doesn't work, try rethreading your serger from the the beginning. Upper looper first, then lower looper, then needle. Test on scraps.

The upper/lower looper need realignment, requires a qualified technician to do this.

Serger thread breaks

1. Is the serger threaded correctly?

2. Is the needles inserted correctly?

3. Is one of the needles bent or damaged?

4. Is the tension adjusted too tightly?

5. Is the tension adjusted to accommodate thickness of thread being used?

6. Are you using inferior quality thread?

7. Is the thread feeding of the cone/spool freely?

8. Is the needle size correct for the type of fabric being used?

9. Are the needles being used the correct one for the serger?

10.check in the needle plate area to see if there is a burr

11. Check the looper to see if there is a burr or if it looks damaged


If all of the above suggestions don't help then the serger needs to be checked to see if there is something wrong with the loopers and also see if there is a problem with the tension.

Serger thread breaks

1. Is the serger threaded correctly?

2. Is the needles inserted correctly?

3. Is one of the needles bent or damaged?

4. Is the tension adjusted too tightly?

5. Is the tension adjusted to accommodate thickness of thread being used?

6. Are you using inferior quality thread?

7. Is the thread feeding off the cone/spool freely?

8. Is the needle size correct for the type of fabric being used?

9. Are the needles being used the correct one for the serger?

10. If all of the above suggestions don't help then the serger needs to be checked for a timing problem at a sewing machine repair shop.

sergers the most frustrating machines. Every time you change fabrics you go through a tension adjusting phase.

First make sure you have threaded the machine in the proper order. upper looper, lower looper, then needles from right to left. Always thread any machine while the presser foot lever is in the UP position.

If you ever break a thread... you MUST pull all threads and rethread using the proper order.

Ok that's out of the way. Pull all your threads and get out several pieces of the same fabric scrap. Thread each pathway with a different color. This will help you determine which thread is giving you fits. Sew a test strip. Which thread is loose? tighten/loosen that tension. Keep doing this until you have a well balance seam. Then clip the colored threads starting with the upper looper thread, tie off to your proper color for your seam pull the thread through and up through the throat plate. proceed in this manner with lower looper, right needle, left needle. Sew a test seam.

Good luck.

has the cone of thread at the back got caught up? this sounds like your thread is being caught and not feeding freely through the tension guides. Check the thread cones are okay and that the thread is pulling freely off the most right hand cone (lower looper). Also this thread dial should be set to the same tension setting as the next dial to the left for the top looper. Other possibility is that the tension disc itself has become gummed up or dirty with thread lint or dirt. Turn thread dial to zero and clean between the discs be rubbing the selvage edge of a piece of fabric between the discs gently. Now return tension to 5 or normal setting and try again.

Hi,...if the lower looper thread is breaking before you sew six inches or more then I suspect a threading problem.When the lower looper thread breaks, You MUST unthread the needles before you thread the lower looper. Thread the looper and then rethread the needles.

Hope that helps,
Doug

I was having this very same problem with my lower looper . I had been using the one needle stitching all afternoon and I was doing quite nice stitching. then I decided to put the right needle back in and do some overlock stitching and guess what I spent the next two hours fighting the looper problem. I had completely re-thread this machine at least 20 times now. I decided to take the needle out and re-insert it and re-thread it one more time (right lower looper- then upper looper- right needle- then left needle) was careful to pull all threads to the back and under the presser foot for about 6 inches.
Held on to the thread, lowered presser foot and did the chaining stitch. BINGO it didn't break, tried it with a piece of cloth and Perfect stitches. I have a Babylock BL402 and used tension settings left to right
4-3-3-3 and default settings for the rest.
Hope this helps someone someday.
Jo Griffith

I had the same problem with the blue thread- it would sew and inch then pop- mine worked wihtout breaking after I re threaded in this order: green, blue, red then yellow