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The lower looper thread keeps breaking, the only propblem I can see/hear is that the needles at hitting the piece of black machinery directly under the lower looper needle. How to I fix this?

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Check that the needle is NOT bent and is seated properly. It is VERY easy to not have the needle seated in the channel.

Posted on Sep 24, 2009

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2 Answers

Upper looper thread keeps breaking


try a new needles
check for burrs
make sure the thread is not caught anywhere

Feb 04, 2016 | Sewing Machines

1 Answer

Bernina 335 serger won't sew/overlock. carefully rethreaded the serger but that hasn't helped.


The 335 has a two thread chain stitch (stitch type 401), and the overlock side (right needle side), is a three thread plain overlock. If you are describing the plain overlock as the problem, I would first suggest the following in re-threading:

1. Thread the upper looper
2. Thread the lower looper
3. Thread the needle last (important)

If the needle threaded, you cannot re-thread the lower looper without breaking the thread.
In order to thread the lower looper, the lower looper must pass by the needle thus picking up the needle thread. So, instead of threading the lower looper thread underneath the needle thread, the looper would be threaded on top and cannot sew without breaking the thread.
Make sure that the threads are bedded between the tension disks. Check this by stretching the thread fore and aft of the tension disks as well as visually noting that the threads are not accidentally threaded behind the disks. You can also loosen the tension disks when threading so as to allow the threads to bed deeply between the disks.
Please reply with your observations.

Sep 27, 2015 | Bernina Sewing Machines

2 Answers

Why does the 4th thread keeps breaking on my serger? I've re-threadedi it a dozen times carefully following the diagram. What am I doing wrong?


Most likely it is either your tension on thay thread being too high, or the needle is too big for the project you are working. Lower that tension, use the next size up needle, and thay should fix it. Also, I STRONGLY suggest only using maxi-locks thread. They are more expensive than other serger threads, but they are always half-price at hancock... Any other thread I have tried using causes breakage, especially on the the lower looper (the 4th thread). Although, of you keep the tension low-below 3 or so, you should be ok. If these tips don't help, I would also check your cutting width, if your machine has an adjustable one. If it is leaving too much gabric to the right of the needles, out is conceivable that this is putting too much pressure on the threads. Let me know if this helps!

Jun 23, 2011 | Simplicity Sewing Machines

1 Answer

Right hand needle comes un threaded. sews fine for about 5-10 inches then i hear a small clunk sound and the thead breaks near the needle. Thanks for helping me. I just spent over $100 because the far...


Many times you can get a small burr on the tip of the lower looper and it will break one of the needle threads. Run your finger nail off the tip of the lower looper, all around, and check for a snag as your finger nail slides off the tip of the looper. You can get some very fine sand paper 600 grit and gently rub on the back side, top, and bottom tip of the looper. Never the front side of the looper. Try serging again and see of that doesn't help.

May 03, 2011 | Janome MyLock 204D Mechanical Sewing...

1 Answer

The lower looper keeps breaking thread


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

Aug 05, 2010 | Simplicity Serge Pro SW432 Mechanical...

1 Answer

I have a acme serger 5, brand new. We have threaded it according to the cd, I even had my son do it also, but the one of the bottom loopers thread keep breaking. I bought serger interlock thread. It will...


I will make this easy first always thread the machine upper looper then lower looper then the needles if a thread breaks especially if it was one of the loopers, make sure to pull the needle thread out before hand then rethread. as for the breakages look to see if the loopers are hitting each other when they cross and see if the needles are hitting the loopers when they go together either of these things will cause problems if so it will need to be looked at by a tech

Oct 20, 2009 | Sewing Machines

2 Answers

Bernina 2500DCET serger keeps breaking the centre needle thread for no apparent reason .Already had machine serviced,new needle plate didn't solve anything either. Any ideas


I have found with any serger I have used that you have to cut the looper (bottom) threads before re threading the needle threads. You then rethread the loopers.
If you don't do this, the needle threads keep breaking. Hope this helps.

Mar 01, 2009 | Bernina 2500DCET

2 Answers

Thread continually breaking in lower looper needle


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

Oct 20, 2008 | Toyota TL-432DE Mechanical Sewing Machine

1 Answer

I've lost my manual and video need threading info


One of the most common mistakes with overlockers is that the threads must always be threaded in order. So if you sew about 1 inch and the thread breaks try unthreading the eyes of the needles rethread the looper and then rethread the eyes of thew needles. If not you will get the same result of sewing about 1 inch and it will break again.

Aug 26, 2008 | Baby Lock Ellure

4 Answers

Brother 1034D


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

Jun 08, 2008 | Brother 1034D Mechanical Sewing Machine

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