Question about Brother LS-2125 Mechanical Sewing Machine

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Upper tension too tight , the dial does not make any difference.

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Same problem here, my bottom thread is crazy loose as well. i have no idea what the problem is. did you figure yours out?

Posted on Aug 05, 2008


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How do I adjust tension?

Probably best to consult your owner's manual. If you don't have one, search the internet for:

Manufacturer + Model + the word "Manual"

HINT--BEFORE threading the upper thread, raise the presser foot so the thread will seat properly in the tension disk. Verify that you are threading everything correctly and not missing any steps.

The upper tension is the dial usually directly above the needle. About the halfway point between the high and low number is the standard factory setting, but that may have changed over time. Start with it set at that point and test, re-adjust, test... For most machines, the higher the number, the tighter the tension.

Correct tension is when the upper and bobbin threads meet in the middle of the fabric. If the bobbin tension is coming to the top of the fabric, the tension is too tight. If the upper thread is showing on the bottom of the fabric or is creating a loopy mess, the upper tension is too loose.

In most cases, the bobbin tension doesn't need adjusting. However, when you get into more adventurous sewing when you load different types of thread, ribbon, elastic, etc. in the bobbin, you might want to adjust the bobbin tension. In any event, be sure to mark the screwdriver slot setting on the bobbin case so you will be able to undue any adjustments you make. And, make only 1/8th turn adjustments at a time and then re-test. Small changes to bobbin tension will make a big impact in stitch quality. Some sewists will buy an extra bobbin case to keep on hand just for special projects.

Also, note that the upper tension will probably need re-adjustment when changing projects with different types or weights of fabric, thread, and needle. Get used to adjusting the upper tension to get the best stitch possible on every project.


Dec 06, 2015 | Sewing Machines

1 Answer

How do I adjust the tension?

Set our machine's upper tension dial somewhere around the midpoint (between the lowest & highest number).

RAISE the presser foot and then rethread the upper thread from the very beginning. (The tension disks are released when the presser foot is raised allowing the thread to seat properly.) (When testing tension, it helps to use different color threads in the bobbin vs the top thread so you can see how it is sewing.)

Sew a test on the fabric you will be stitching. The ideal tension is when the upper thread and bobbin thread meet in the middle of the fabric. If the bobbin thread is appearing on the top of the fabric, the upper tension is too tight and needs to be loosened. If the upper thread is appearing under the fabric, the upper tension is too loose and needs to be tightened. Righty-tighty and lefty-loosey!


Nov 19, 2015 | Sewing Machines

1 Answer

How do I set the tension on my JANOME 3434D serger?

Begin by setting all 4 dials on "3" which is the default setting on this model (often "5" on other machines). If a beginner, it would be best to thread the machine with four different colour threads according to the colours indicated on the tension dials (yellow, red, blue &green) so that it is easier to see how each thread responds as you adjust the dials. The two lower dials are for the loopers & must be adjusted until the upper & lower loops meet on the cut edge of the fabric - if below the edge: tighten the left dial & loosen the right dial (& visa-versa) just a fraction at a time. The two upper tension dials are for the needles: if too loose, loops form underneath the fabric below each needle, & if too tight the lower threads will show through to the upper side of your fabric where it is pierced by the needle. Good luck!

Jan 18, 2015 | Janome Sewing Machines

3 Answers

My Singer XL 6000 upper thread is too tight and keeps breaking, when the presser foot is up the upper thread is loose, but when the presser foot is lowered the threah gets too tight, what I notice is that...

You need to loosen the tension on the machine. There is a dial that has numbers on it. The higher the dial is set, the tighter the tension is. Turn the dial to the left one number. Then try it. Do it over and over. Do not turn the dial all the way down or you will mess up your machine. Do it slowly, one number at a time and try the machine between dials.

Dec 22, 2014 | Singer Sewing Machines

1 Answer

Brother vx 860

First, make sure the upper thread is threaded correctly. I don't have this model but see if this helps. If the bobbin thread is visible from the right side of fabric, the upper thread is too tight. If the upper thread is visible from the wrong side of the fabric, the tension is too loose. Turn the thread tension dial to the right to tighten and left to loosen upper thread. Good luck. Loverly Lou

Jul 17, 2014 | Brother Sewing Machines

1 Answer

Upper tension dial on White sewing machine turns complete circles

try a top tension of 4 or if you have a automatic setting try that
if that doesn't help then the tension dial need to be checked
to see if some thing is wrong with it, it might need to be replaced

Sep 09, 2012 | White Sewing Sewing Machines

1 Answer

The stitch is to tight can't get it even

Most likely the upper tension dial is too high. Turn it to 4 and try pulling the thread through the needle and see if it moves easier than before. If not turn it to 3. This should be a good tension on your upper thread so it won't make the stitch so tight. Also, be sure that the thread spool holder isn't too tight against your spool of thread. Let me know if this works.

Sep 10, 2010 | Brother Sewing Machines

1 Answer

Tension dial on my sewing machine is not working

Hi, Liz. When you adjust your tension, be sure the pressure foot is down. The pressure foot needs to be up when you thread the machine so the thread will slip easily between the tension disks, but when you adjust the tension the disks have to be tight (pressure foot down).

There are other possibilities, but this is the best place to start running the problem down. Please let me know if this does the trick, ok, and if not, we can try something ele.

Happy Sewing


Apr 01, 2010 | Janome Harmony 2039 Mechanical Sewing...

1 Answer

The bottom thread is bunching up not keeping tight tried everything to change tension according to the manual I was hopeing I could fix my own problemit has never been serviced before

Make sure your UPPER thread is correctly threaded in the machine, put the UPPER thread tension dial to 5. you can also try it on 6, 7, etc., the higher the upper tension is set the less top thread will show on the bottom of the cloth.

Feb 09, 2010 | Euro-Pro Deluxe 7100 Mechanical Sewing...

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