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The right needle touches the lower looper and the thread breaks or it does not form a chain

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Sounds like your machine is out of time. I recommend you take it to your local repair center.

Posted on May 12, 2009

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My brother 1034D is not making a chain stitch. I've rethreaded it hundreds is times & replaced the needless, I've cleaned it. I think it's the timing, but I can't find how to fix it. Any help?


You didn't indicate what happens when you try to stitch. Does the thread break? Is it just not forming a chain?

Confirm that the needles are installed facing the right direction and that they are pushed up as far as they will go before the skrew is tightened. (Are you using the right needles for the machine?)

Make sure that you are threading in the proper order and that every thread guide is threaded. Each thread has an order when it should be threaded, ie upper looper first, lower looper second.... If that order is not followed, there's a very good chance your machine will never work properly. The lower looper thread should cross over the top of the upper looper before being pulled under the presser foot and toward the back of the machine.

Second, be sure to RAISE the presser foot when threading so that the tension disks are released to seat the thread. Give each thread an extra little tug when going through the tension disk to make sure it is seated all the way.

Check that the tensions are set at the midway point between high & low numbers as an initial setting. They can be tweaked later to get the optimum tension.

Test your machine.

If it is still not forming a chain, it could be that the machine is out of time and needs to be professionally adjusted.

...

Apr 21, 2016 | Brother 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

1 Answer

Thread broke on bottom looper the first time out of box i had to try and thread and the tension was still tight The bottom threads were not stiching


I'm going to assume here you're talking about a serger. Unthread the lower looper and the eyes of the needle. Set the lower looper tension to 0. Rethread the lower looper, then the needle eyes. Then reset the lower looper tension (try about half a number lower) and see if it chains. If it won't chain, try replacing the needles.

Mar 17, 2014 | Janome Sewing Machines

1 Answer

No chain forming on 1034d


You may have re-threaded in the wrong order. The correct order is upper looper, lower looper, right needle, left needle. So 3,4,2,1 (if numbering left to right)

Jul 23, 2012 | Brother 1034D Mechanical Sewing Machine

1 Answer

My Janome 204d Serger won't form a chain stitch. It is threaded correctly. I have changed the needles??


I would suggest that you check the needles again, make sure they are both fully up into the needle housing. Also they should be at different heights in order to form the stitch sequence.

It is important that you thread the loopers first in the sequence shown in your manual, then the needles. So you may need to recheck the threading again and make sure the threads are in all the eyes correctly, especially the lower looper. Also some overlockers, have a sliding eye on the lower looper for ease of threading, if yours does, make sure it has been slid back to normal operating position.

When you have checked the threading up, take all four threads under the raised pressure foot and make sure that the upper looper thread and lower looper threads are not crossing over each other. Lower the pressure foot and try to chain off again.
I hope this helps you to resolve the issue.

Oct 11, 2011 | Janome MyLock 634D Mechanical Sewing...

1 Answer

My serger doesnt make any stitches at all. I have been going through this book for 3 years and I cant get it to work


Has it ever chained off since you bought it? If you purchased it second hand it is possible that the timing of the loopers is out and this will prevent a chain from forming.

However, I'll go through general overlocker/serger troubleshooting for threading up. The critical things are to thread it exactly as the diagram shows, some sergers have a diagram inside the front looper cover so its easy to refer to when you are working on the machine. Or use the manual diagram. There is a sequence you need to follow in threading up, usually upper looper, lower looper, then the needles. This is important. Then you pull all four threads under the raised pressure foot, lower the pressure foot, and start to stitch and hopefully a chain forms. If you need to change a thread you can knot on a new colour, turn the tension to zero, then pull through the new thread. Pull the knot right through the looper eyes but you will need to cut the knot out and thread the needles with the new colour once you get there. Then turn tension back to the normal setting (5 usually) and again pull all threads under the foot.

The timing of the two loopers to the needles is critical to a stitch forming though so if you have tried everything and aren't getting a result; then perhaps its time to take it to a service centre, get it checked out and if it works fine for them, ask for a quick demo of threading up, then do it yourself with the demonstrator watching.

Overlockers are very different to sewing machines and there is a learning curve but once mastered, they are so quick and give a great finish.

Oct 08, 2011 | Singer 14SH654

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...

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

2 Answers

Threading a husqvarna huskylock 1001L serger


Solution taken from "Handbook for Huskylock Sewing Machine Models 1001L/1000L/1000"

1. Raise the presser foot by using presser foot lever. When the presser foot is raised, the two thread tension discs in the thread tension control panel are released so that thread passes freely between them. Otherwise thread tension may not be correct.

Important! When threading the needle, always be sure to lift the presser foot lever, and also take care to thread in the proper order.

Threading order:
1. Upper looper thread (green)
2. Lower looper thread (blue)
3. Double chain stitch looper thread (purple) in case of 5 thread stitch or double chain stitch
4. Right needle thread (red)
5. Left needle thread or double chain needle thread (yellow)

Caution!
Because the left thread tension dial (yellow) is used for either the left needle or the double chain stitch needle, these needles will never be used at the same time.

Upper looper (green) sequence:
1. Thread holder (silver triangle openings attached to thread holder stand)
2. Thread guide (flat silver clips just behind thread tension disc)
3. Thread tension disc (circular knobs with numbers for tension setting)
4. Pull thread around upper looper guide and upper looper
5. Pull thread into hole of upper looper

Lower looper (blue)
Repeat 1, 2, 3.
4. Pull thread around guide (see color coded chart inside front serger cover).

Easy threading mechanism (for lower looper)
1. Pull out the lower looper threading lever
2. Thread the lower looper and position the thread on hook of the lower looper
threading lever.
3. Push the lower looper threading lever back to its basic position while
holding the end of the thread.

Caution:
When returning the lower looper threading lever, always make sure that the two
blue triangle marks (directional arrows) meet each other.

Right needle thread (red)
Left needle thread (yellow)
Important: Thread the needles after threading of lower looper and upper looper.
First raise the presser foot lever, and then thread the needle threads in order shown in color coded thread guide.




Jun 24, 2008 | Sewing Machines

1 Answer

Singer overlocker


Most likely is the left looper thread is trapping the needle threads.

Remove the threads and start over in this sequence....

Left looper - right looper - left needle - right needle.

If you thread the needles before the lower looper, the needle thread wrapped over the looper will be under the looper thread and will never be free to form a stitch, so the threading sequence is critical.

Jun 08, 2008 | Sewing Machines

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