Question about Brother LS-2125 Mechanical Sewing Machine

2 Answers

Huge loops on back of fabric!

I am going to look into how my top thread is threaded now that this has been mentioned, however, I've had this machine for almost 5 years now,and have used it with mostly no problems...until now...I threaded it exactly the same as I always do, and it's now working...possibly something is messed up in the tension of the upper thread? I don't know, but I really need my machine to work! Anyone have any ideas?

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  • haggie10 Jul 18, 2009

    I replaced the needle, and the bobbin, completely rethreaded my machine several times, played with the tension for over 3 hours between the bobbin tension and the upper tension. It is now sitting with the front off, and my husband and I have been trying to look at it to see what's wrong. Through playing with the tension and adjusting it, we've been able to improve the situation, now I only have small, occassional loops on the back of the fabric, but no matter what I do, I can't seem to get it to be completely perfect...I run a home business, so almost won't cut it here.

  • haggie10 Jul 31, 2009

    I've tried several different fabric's and threads...and I sew for a home based business, so I can't really just pull on the thread to fix it b/c my items have to be near flawless.

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  • 7 Answers

Not a real "solution" but considering you've tried practically everything, all I have to add is, pull on the thread trails occasionally while you stitch, it *should* make those loops come out.

Have you tried a different type of thread? If you're using different fabric for this project, then maybe the thread and fabric don't get along. Throwin it out there, you can toss it back if you don't like it.

~iamtyping

Posted on Jul 31, 2009

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  • 9 Answers

Have you changed the needle recently? It is possible you have a bad needle, or you need to change the needle as it is worn or bent. It is possible the needle is in backwards as well. It happens.

Posted on Jul 17, 2009

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Posted on Jan 02, 2017

bargainbox
  • 1388 Answers

SOURCE: Huge loops on back of fabric!

Please TRY the solution BEFORE giving your considered rating.
Specific detail on bobbin case adjustment (with picture) near halfway down reply, the remainder will help you achieve a balance of top and bottom tensions.

Ensure that all is clean and free of lint and jams, this is the most likely cause....now for tension troubleshooting .......

This solution is for tension problems...if you cannot form any sort of stitch, the issue is quite different, so please let me know if you need a different problem solved.....

It is quite long, but just work through each section in order.

The "knotting up" can reveal a lot. If you have loose threads on one side or the other, the tension on the opposite side will be the culprit.

QUICK SUMMARY FIRST:
Ensure sharp new needle,
Thread guides and Bobbin are Clean & Clear of lint
Set Top Tesion to 4 ....then....
Balance Bobbin to suit.

TOP THREAD TENSION:
If the looping threads are on the underside as you sew, it is the top tension. Top tension ought to be between 4 & 6 (this variation to allow for the different weights of fabric in your projects).

IS YOUR NEEDLE SHARP ?
If you are using a needle that has seen quite a deal of work, or you suspect it may be blunt, change it for a new one !

TOP TENSION & GUIDES:
Make sure that when you thread the machine the presser foot is up so the thread goes between the discs and not to one side, top tension between 4 and 6, and that you have threaded through all the guides, including the last one, usually on the needle arm, just above the needle clamp.

It may be there is lint trapped between the discs, this will keep them slightly apart and reduce the actual tension, sometimes dramatically.

If tensions appear correct, and the thread is definitely in the channel between the discs, but still too loose and looping, try raising presser foot and remove your thread.

Now, with a 2" (50mm) wide strip piece of fabric 8 - 10" (20 - 25cm) moistened with methylated or denatured spirit, gently insert the fabric strip and clean between the discs with a see saw / to and fro action.

In the worst cases, gentle use of a needle to pick & remove the jam may be necessary, but be very gentle and make sure the tension is set at Zero and the presser foot is raised, (to disengage tension plates).... do not gouge or score the plates, they need a polished surface to work correctly.

BOBBIN TENSION:
Far less common, but if the loose threads are on the top, it is bobbin tension that is loose, it too may have lint in the spring and be giving a "false" tension.

I would not recommend fiddling with bobbin tension without good reason, it may end up with missing small screws and spring pieces, however, you can take the needle plate off to clean
the hook race area (where bobbin case sits)

...this is just good housekeeping, my wife does this every time she replaces the bobbin....

just take it out and clean the bobbin case and the fixed metal hook race with a small brush to remove lint. If there is a significant amount of lint, use a vacuum and small brush to get the worst.

Then wipe all this area with a cloth or cotton bud (Q tip) moistened (not soaked) with methylated spirit, especially if there appears to be fine dirty deposits....oil and lint combine to conspire against you.

If it seems likely that you ......really ....do .....actually .....need .....to adjust the bobbin case, first check there is no lint trapped in the metal spring where the thread is tensioned.

TOP LOADER:
Drop-in Bobbin case will look similar to this image with the tension screw in the middle of the metalwork....

4c76dc1.jpg ...the other screw at one end is holding it all together, so beware....it is not a tragedy to undo the whole lot and clean it, but very gingerly and lay the bits out in sequence and orientation, or you risk tearing your hair out !

FRONT LOADER:
....this is a bobbin case from a front loading machine and works in a very similar fashion to the top loader with drop in bobbin, again, if you dismantle it, take care so you can put it all
back properly.
165ca5c.jpg FINISHING UP
GETTING THE BALANCE RIGHT:
When you are certain there's no trapped lint in top tension or bobbin, set the top tension to 4 and the bobbin tension to a point where you just begin to feel resistance.

Try using good quality thread of contrasting colours so you can more easily spot the changes.

Set your zigzag to one width less than maximum (eg. 5 of 6 ...or... 4 of 5 etc) and sew a sample for a few inches and check the result.... adjust the bobbin tension screw very little at
a time, perhaps 1/16 of a turn.

You may find you are playing with this balance for some little while and if you are putting the needleplate on and off each time begin to think it cannot be correct to do this.....BUT....it is,
and eventually, you do get a "feel" for the correct tension and then it happens quite quickly.....as a user you won't be doing it very often unless there is lint built up (or are there small hands at work around the house !?!?!)

OTHER ISSUES:
If you live near the ocean as we do, salt air can play havoc with metalwork inside and out, so to help minimise this, keep a few small packets of dessicant (silica gel) in your machine
case....no case ? then make some sort of cover !

Same applies in any damp or humid environment, keep your machine dry and dust free.

Budget for a proper full service every couple of years (more often if heavily used) and if you don't use your machine for a few years, be aware that old oil will dry out and combining with
dust and form a "clag" like glue (another reason for some sort of cover, even a teatowel !)

FINALLY, A WORD ON THREAD:
If it is worth spending the time, energy and money on making something that you would like to give lasting enjoyment......use quality thread, .......it may seem to cost a little more at the
time, but the results, ease of use and added longevity will be worth the extra, and as a bonus, your tension troubles may be fewer and further between, because there is a more consistent diameter with good thread, and less compensating to be done by your tension plates and less thread breaks !

bargainbox.com.au

Posted on Aug 02, 2009

  • 1 Answer

SOURCE: Threading CG-590

I have a CG590 SEWING MACHINE AND CAN NOT THREAD IT WITH THE DIRECTIONS THAT CAME WITH IT. CAN YOU HELP THANK YOU, SANDY

Posted on Nov 27, 2009

  • 1116 Answers

SOURCE: needle thread tension- huge loops

Put the tension settings back to the mfg's suggested setting.

Re-thread the machine with the presser foot up and there will be no more loops.

Posted on Mar 03, 2010

  • 1116 Answers

SOURCE: I get loops on top and/or bottom of fabric during

Top tension back to 4 and leave the bobbin tension as is.

Make sure you have a new needle for the type of fabric being sewn installed with the flat side to the back of the machine. A bent needle can sometimes go unnoticed.

Always thread the machine with the presser foot up and this will give proper tension to the stitch.

Check the manual to be sure you are threading correctly (always with the presser foot up) and that the bobbin thread is feeding in the correct direction from the bobbin spool and through the guides.

Take hold of the thread at the needle as you lower and raise the needle to pull up the bobbin thread. Take both thread ends under the presser foot and to the back of the machine.



Posted on Mar 11, 2010

  • 1116 Answers

SOURCE: bobbin thread loops

If you threaded the machine with the presser foot UP and the thread from the bobbin is feeding from the spool in the correct direction and through the guides on the bobbin case and the loops are still forming, then the machine needs to go into the shop as the timing may need to be adjusted and this is best done by a sewing machine technician, preferably Brother.

Posted on Apr 28, 2010

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1 Answer

I am having trouble getting the bobbin to function properly during sewing.


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If top thread is still creating a mess of loops under the fabric, try tightening the upper tension. The tension is ideal when both upper and bobbin threads meet in the middle of the fabric.

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