Question about Brother LS-2125 Mechanical Sewing Machine

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Loop/lock on reverse of fabric

Stitch has locks/loops on reverse & cannot be corrected by upper tension dial .
machine has done this on & off since bought last year

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  • sandra836 Jul 15, 2008

    I already tried the screw with a half turn ...while replacing spool case found one of springs was hanging loose so now getting a replacement machine as it is still under warranty .
    great service from the Brother helpline :-)


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Check the tension on the bobbin in the base - there is a small screw on the bobbin that sets it's tension.

Posted on Jul 15, 2008

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How do i adjust my consew 105 so the stitches do not loop on the bottom?


If the thread is looping under the fabric, it is a top tension issue.

Make sure you are using a new needle and that the needle/thread/fabric are compatible.

Verify it is threaded correctly and that the thread is firmly seated in the tension disks.

If the top thread is still looping under the fabric, then the upper tension is too loose.

...

Nov 07, 2016 | Consew Sewing Machines

1 Answer

Most of the time the bobbin stitch is correct. Occasionally there is a loop in the bobbin thread. Any suggestions as to what this could be?


Is it actually the bobbin thread that loops or is the loop appearing on the underside of the fabric as you stitch? If it is a loop under the fabric, that's usually an indication it is an upper thread issue. Thread irregularities that appear on the topside of the fabric are generally bobbin related.

First thing to try is installing a brand new needle. Verify it is the correct needle for the fabric and thread being used.
All About Needles
Sometimes, the fabric being stitched will "grab" the thread and hold it for a second before releasing and will cause a loop. In this case, a needle with a larger scarf and eye may be helpful.

You might also open the upper tension as much as possible, RAISE the presser foot and run a piece of UNwaxed dental floss through the tension disk a few times to clear out any gunk that may be stuck there. A piece of pearl cotton dipped in rubbing alcohol and squeezed moist/dry will also work.

Remove the upper thread. RAISE the presser foot and rethread the top thread from the beginning. Use only fresh, good quality thread--NO old or bargain bin variety! Try using the same thread in the top and bobbin. Make sure the thread is firmly seated in the tension disk and the thread path is correct. Check that there are no burrs or snags in the thread path that could be catching the upper thread. Especially, check that the thread is not catching on the spool "slit" that holds the thread when in storage. Every time the thread navigates around the thread spool, it could be catching on that slit just enough to cause a loop.

Try changing the bobbin. There could be something amiss with the current bobbin--could be nicked or could even be the wrong bobbin for the machine. Also, make sure the bobbin is loaded and turning the correct direction in the machine.

Set the upper tension to the midway point. This is usually the starting point, although it will probably require some tweaking. Test your stitch and adjust the tension so the upper and bobbin threads meet in the middle of the fabric. Neither thread should dominate one side of the fabric or the other.

Understanding Thread Tension Threads

Last thing to try is a different presser foot.

If you still have the intermittent loop, you might want to take it for service. Could be a problem within the tension disk.

Nov 05, 2016 | Sewing Machines

2 Answers

Back side of stitches are loose


increase the thread tension of the needle thread
this is an indication that the tension is not enough to pull the bobbin thread up tight

Jun 15, 2016 | Sewing Machines

1 Answer

How do I adjust tension on a Necchi Lydia 510 sewing machine?


loops under fabric means top tension needs to be tightened
try cleaning the top tension dial with some unwaxed dental floss and see if that helps. if it doesn't then the tension dial may need to be replaced
also check to make sure the spool of thread is not getting caught on the spool holder
also try a new needle--one that is correct for the fabric being sewed

Feb 10, 2015 | Necchi Sewing Machines

1 Answer

Looped threads


Hello Rosemary
Looped thread on the underside are created by the upper thread. Loops on the top of the fabric are created by the bobbin thread. Whichever one is looping, has very little tension. This may be corrected by:
1. Re-threading the upper thread according to manufacturer's specifications.
2. Re-wind bobbin and re-set it into bobbin case and bobbin case area according to manufacturer's specifications.
3. Ensure that the needle is correctly installed and is the correct needle for the sewing machine.
4. Ensure that he bobbin being used is the correct one for the machine.
5. Double check that the tension on the upper thread is at the correct setting.
6. Double check that the tension unit is clean and free of dust, lint or lodged thread/s.
7. Double check that the bobbin tension is correctly set ... if you are comfortable doing so, otherwise leave it for a qualified technician
8. Make sure that he presser foot is down when stitching.
Please let me know how you go.
Happy stitching.

Nov 14, 2014 | Sewing Machines

1 Answer

What is the tension settings for normal over locking with the Elna 4de


First of all ensure that the serger is threaded correctly.

The two setting which you mention are really a 'range' for an 'average' setting.

Using 'average' fabric such as a medium weight cotton, flannel, etc.; set each of the tensions in the middle of the range and test the stitch. There may be minor adjustment required to get a perfect stitch.

Once you have stitched that first sample, here are some possible minor adjustments required:
1. Tear-drop shaped loops on the underside: Check that the thread is firmly set in the tension dial by giving the needle threads a good snug pull above the tension dials while the presser foot is down.

2. The zig-zag like thread on top should meet the ziz-zag like thread on the underside right on the fabric cut edge. If the meeting happens on top: reduce the upper looper tension slightly and increase the lower looper tension slightly ... test sew and recheck. If the meeting is on the underside: increase the upper looper tension slightly and decrease the lower looper tension slightly ... test sew and recheck.

3. If the meeting does happen along the fabric cut edge but the meeting is hanging beyond the fabric cut edge: increase the blade position (that is, move the blade to the right). If the fabric is creating a ridge or tunnel; move the blade to the left slightly.

Please let me know if this has solved your problem. Otherwise let me know what is happening with the stitch quality.

Sep 16, 2014 | Sewing Machines

1 Answer

Big loops at the bottom of the material


Hello smallflame,

The looping on the underside of the fabric is due to the tension on the upper threading being to low. Try setting the tension dial to a higher setting. If this does not help, make sure that you are using the correct needle for the fabric you are stitching on. If the problem persists you should try rethreading the upper fabric.

Thanks,

Pat

Nov 07, 2010 | Brother LS-1217 Mechanical Sewing Machine

3 Answers

Sears Kenmore sewing machine model number 15358 tension issues


#14 needle is way big for cotton napkin scrap. a #10 is good for most lightweight fabric. #14 is for sewing denim or levis, like that.

the tension problems on almost all machines regardless of price usually fall on the upper tension. the lower bobbin tension is factory set and it's rare you should ever need to mess with it.

if you have a drop in bobbin (top loading), tighten the adjustment screw all the way and then back it off 1/4 turn. if your machine uses a shuttle bobbin, tighten the adjustment screw all the way and then back it off in 1/4-turn increments until you can hold it in the air like a yo-yo and cause to bobbin case to fall slightly dipping your hand.

A dull needle and stitch length will also mess up your stitch. The idea is to narrow the problem down to one thing and one thing only -- UPPER THREAD TENSION.

So, if you have the right size needle for the job, with the right thread, and if your stitch length selection is correct (usually between 2 and 3 or 8-to-10 stitches per inch, the problem should be with your upper thread tension.

An easy way to fix this then is to remember: Loops on top, upper tension drop. Loops below, upper tension grow. If you get loops on top of your work, lower (drop) your upper thread tension to a lower number. If you get loops on the bottom, raise the upper thread tension.

Different stitches on the same machine will require different upper thread tension settings. Don't be afraid of it. Just remember the pneumonic: loops on top, tension drop, loops below, tension grow -- referring to upper thread tension.

have fun :)

Apr 15, 2009 | Sewing Machines

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