Question about Brother Lay-In Thread Serger Mechanical Sewing Machine

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Brother serger thread

Why the lower looper thread always gets stuck & breaks even following the correct threading method?

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  • johnnmarsha Aug 12, 2008

    My lower looper also breaks constantly. It seems the thread moves too far to the right of the slide out thread guide. It is very frustrating and I would appreciate any help.

  • Anonymous Mar 28, 2014

    the lower looper thread keeps breaking and the serger will not make a chain



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The lower looper thread MUST be threaded before the needles are threaded. You must also be sure the lower looper thread is pushed and staying all the way to the left before it is threaded through the looper eye. Double check the threading diagram and count the number of guides the thread passes through. Count how many guides you have actually passed it through. It must be the same. The dealer you bought it from should be willing to show you if you can't figure it out.

Posted on Jun 18, 2008


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Posted on Jan 02, 2017


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I would like a diagram of threading help that is big enough to see, for Bernina Serger 2000 D , NOT 2000 DE. Or maybe I have just BERNINA 2000. Please. I have the manual. JOELLIE@SHAW.CA
If you view the book online, you can usually enlarge the view.

Easy Instructions for Threading Bernina Serger eHow

Start out with NO thread in the machine.
ALWAYS RAISE the presser foot during the threading process.
When threading through the tension guide below the thread tree and through the tension disk, give each thread an extra little tug to make sure it is completely seated (it may even make a little popping sound when it seats).
ALWAYS THREAD each IN THE CORRECT ORDER (upper looper first, lower looper second, then the needles). When threading the lower looper, ALWAYS FINISH with the lower looper thread draped OVER THE TOP of the upper looper.

If a serger looper thread breaks, it is most often easier (and much less frustrating) to unthread the entire machine and start from the beginning. Trying to fish a thread through only works about 1% of the time, Just bite the bullet and do it!

When unthreading the machine, NEVER pull the thread UP through the tension disks! Instead, cut the thread below the thread tree, RAISE the presser foot and pull the cut threads down and out.

The Bernina Serger Workbook may be helpful, found here:



Jun 15, 2017 | Bernina Sewing Machines

1 Answer

Toyota overlocker sl3000 ; 3rd thread keeps snapping. How do I stop this ?

Third thread--is that the upper looper? Remove all the threads from the machine. Clip them below the thread tree, RAISE the presser foot, and then pull all 4 threads down through the needle. (Never Pull Up!!)

ALWAYS RAISE the presser foot.
Rethread beginning with the Upper Looper, then Lower Looper, then the needles. Be sure to ALWAYS thread in this order!! (On most newer machines, when threading the Lower Looper, always finish with the Lower Looper "draped" over the top of the Upper Looper.)

If a thread breaks, remove the threads and start over from the beginning as trying to fish a thread through the existing threads very SELDOM works.

Verify each thread path is correct.

When threading each thread and to insure the threads are seated in the tensioners, give each thread an extra little tug when going through the tension disk.

Be sure to oil your machine frequently to keep it operating smoothly!

Make It Handmade Threading Your Serger or Overlocker

Serger threads Threads Magazine Gatherings Forum Sewing Questions Answers

May 03, 2017 | Toyota Sewing Machines

1 Answer

Lower looper cotton keeps breaking

Usually it means it is not threaded correctly. Remove ALL the threads from your machine. Be sure you RAISE the presser foot when threading. ALWAYS thread in the correct order. Verify the thread path for each is correct. Check that the threads are seated in the tension disks--give each a little tug when going through the tension disk. Be sure that the thread tree is extended to its full height. Check that the lower looper threads are not set too tight. Also, always use fresh thread--no old stuff from grandma's sewing basket.

ONE MORE TIP: When a thread breaks, you will usually find it less frustrating to unthread the ENTIRE machine and start from scratch. Trying to fish a thread out of sequence will most often times end in failure.

Serger threads Threads Magazine Gatherings Forum Sewing Questions Answers

Jan 15, 2017 | Sewing Machines

2 Answers

Why does lower looper keep breaking

probably need a adjustment, you may have to have the looper checked

May 26, 2016 | Sewing Machines

1 Answer

One of the threads tears?the second one from the right.

Assuming this is a serger. The second thread from the right would be the lower looper. Nine times out of ten, when the looper thread breaks, it's because it is threaded incorrectly or the tension is set too high.

It is generally recommended that when a thread (especially a looper thread) breaks on a serger, you should remove all the threads and start over from the beginning (yep, that sounds painful but it is better to just bite the bullet and just do it rather than fighting it and never getting it threaded right). Make sure the presser foot is raised throughout the threading process, give each thread an extra tug when going through the tension disk to insure it is seated in the disk properly, follow the threading order (usually upper looper first, then lower looper) and the thread pathway is correct for each thread (no guides are skipped and thread is not wrapped around something). The last step of the lower looper threading is to make sure the lower looper thread drapes over the upper looper before being pulled under the presser foot and toward the back of the machine.

Set the tensions to the midway point between high & low numbers before testing.


Apr 10, 2016 | Sewing Machines

1 Answer

Overlocker is not sewing. How can I thread the lower looper without it breaking?

Thread breakage is usually an indication that the machine is not threaded correctly or the tension is set too tight.

As a reminder, if a thread breaks, save yourself some (lots!) frustration and rethread every thread From The Beginning. Rethreading only the broken thread will usually just lead to it breaking again. Sergers are finicky and must be threaded in the correct order. Also, Always raise the presser foot while threading. Your thread breakage is occurring with the lower looper. Be sure that you are threading every guide and give it a little tug going through the tension disk. Usually, the last step is to drape the lower looper thread over the top of the upper looper before it is pulled back and under the presser foot. Be sure to initially set the tension at the midway point between the high & low numbers.

My serger is still not working properly trhread still breaking lower and...


Apr 07, 2016 | Sewing Machines

1 Answer

Just bought Juki MO1000. Have threaded and re-threaded several times (easy enough) because the lower looper thread (position 1) thread breaks after sewing 4-5 inches. Any ideas?

Yep, 9 times out of 10 when thread breaks, something is not threaded correctly. Also, whenever thread breaks or becomes unthreaded, best policy is to unthread everything and start over from the beginning. Simply re-threading the broken thread will usually not work.

Remove all the thread from the machine. RAISE the presser foot (important to ALWAYS do this so the threads will seat properly in the tension disks).

Rethread totally from the beginning making sure to follow the threading instructions for each thread and that the threads are threaded in the ORDER (ie upper looper, then lower looper, then needles) per the manual. If the threads are not threaded in proper order, the machine will most likely never work.

When threading the lower looper, as the last step, be sure to pull the thread tail over the top of the upper looper mechanism before pulling the thread tails under the presser foot.

If the thread continues to break, make sure the tension for that disk is not set too tight. Loosen it up and see if that makes a difference. Most factory standard thread tensions are around the midway point between the high and low numbers. Then slight adjustments can be made from that setting to tweak the tension result.


Jan 29, 2016 | Juki Sewing Machines

1 Answer

Correct threading for 4 th. Juki ind. overlocker

Overlockers and or Sergers are ALWAYS threaded the same way. Upper looper, Lower looper, right needle, left needle. If you have a model number for your Juki we might be able to find you more information.

The best way to figure out tension problems is to thread each thread in a different color so you can determine which thread is giving you problems.

These machines can be frustrating and EVERY time the thread breaks you MUST start the threading problem from the beginning... upper looper, lower looper, right needle left needle.

Aug 31, 2012 | Sewing Machines

2 Answers

Threading the bernina 1300DC serger

These things are always complicated when you try to write them down, so I suggest a call to your local Bernina dealer to arrange a quick lesson on how to do it.

If you can go back to the dealer whence it came, so much the better..........perhaps you could go in and buy some things you need and then as you are leaving, make the enquiry with the machine in your car, they may be able to show you how to do it right away......building relationships is a very good way of feeling comfortable about asking for help.

If the manual diagram is too small, a local library or stationery supplier should be able to magnify a photocopy for you to see it all more easily.

Jun 04, 2008 | Sewing Machines

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