Question about Brother LS-2125 Mechanical Sewing Machine

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How to adjust bobbin tension on a brother vx-1250

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

bargainbox
  • 1388 Answers

SOURCE: The lower (bobbin) thread on my brand new Brother tangles

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

Best Wishes
Martyn
Bargain Box in Australia

Posted on Sep 08, 2009

  • 1 Answer

SOURCE: Sewing machine bobbin thread issues

i dont found the bobine

Posted on Nov 22, 2009

  • 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

chrismyers67
  • 53 Answers

SOURCE: top thread keeps breaking

This sounds like a backwards needle. Take out the needle and when you re-insert it back in, make sure that put the flat side to the back.

c384264.jpg

Posted on Jun 07, 2010

  • 1 Answer

SOURCE: Brother VX-1120- The needle is not picking up bobbin thread.

I had the same problem with my brother vx-1120 sewing machine. I set the needle to lowest position by using the hand crank. Then I loosened the knerled set screw that holds needle in place. Then I moved needle shaft till the eye of needle is just lower than the hook on the shuttle loop maker. It made my mechine work. There are instuctions for ajusting timing on machine but I think these mechines are built to not fix and throw out. Just because there where no ajustment marks at all on machine, any machanical machine will needed to be ajusted sometime.

Posted on Oct 30, 2010

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Instruction manual for brother vx1130


This is as close as I can come, unless you read French.
VX-1400 / VX-1250 54-pages$10 + shipping

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Feb 19, 2015 | Brother Sewing Machines

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How to thread the bobbin on a brother vx-810


The sewing on the bottom is loose because you don't have enough tension on the TOP thread. First, make absolutely sure you are threading the machine correctly. Next, while using 2 different colours of thread, tighten the top tension dial one number at a time and then checking the stitching, continue tightening the top tension until the sewing is even on the top and bottom of your cloth.

Apr 02, 2013 | Brother Sewing Machines

1 Answer

I have a VX1250. I don't know how to regulate the tension.


There is two places to adjust thread tension: the top tension device controls the top thread tension and is usually a dial or knob with numbers on the front of the machine.

Then there is some form of tension device on the bobbin; in your case I believe the Brother has a removable bobbin case with a tension spring which holds the bobbin thread firmly: the tension spring can be adjusted with a screwdriver but once set, you shouldn't need to adjust this much, just alter the top tension slightly for different weights of fabric. So start by setting top tension dial to 4-5 and test stitch a seam. Use different coloured but the same type of thread top and bottom and take a look at the seam. You want to see a balanced even seam.

Here is a link to a great info site for this:
http://www.sewusa.com/Sewing_Machine_Repair/Thread_Tension_Settings.htm

If the bobbin thread is too loose, then you probably will need to finess the tension spring on the bobbin case and adjust this slightly. The best way to set the tension on the bobbin case is as follows. Load the bobbin into the bobbin case and pull the thread tail into the tension spring, then suspend the bobbin by holding the thread tail up in the air (the dangle test). You want it to be just tight enough to hold its own weight, but still able to release thread when you pull gently downwards on the bobbin case. If it isn't doing this then take your little screw driver and adjust the screw on the leaf tension spring by ONE QUARTER TURN ONLY. Lefty looser, Righter Tighter. Then test again, and adjust again until its right.

Now test stitch again and finess your top tension to get the seam even. Remember to change the needle for each new sewing project too; this will impact tension also.

Jan 04, 2012 | Brother Sewing Machines

1 Answer

I just loaded the bobbin and when I sew the bobbin thread is wavy Is it a tension problem or did the bobbine not load properly or do I have the bobbin in wrong?


Do you mean that the thread on the underside of the stitching is wavy? if so, yes it sounds as if the bobbin thread is not under tension.

Take the bobbin out of the bobbin case and reload, make sure that the bobbin is in the right way and then hold the bobbin still and press the thread tail into the tension spring until you hear it click in. Usually the thread will come off the bobbin, through the tension then reverse direction in a "v" shape.
tally_girl_43.jpgI think this is your bobbin case. So bobbin would go in and rotate anticlockwise, and thread would go into the tension spring south, then reverse direction north so rotary hook catches the thread.

Just make sure thread is fully into the tension spring, pull backwards on it and it should stay in the tension device if its in properly. If not, it will come out.

If you can't get a resolution then the tension spring may have failed, you can buy replacment bobbin cases from Brother, a local dealer or
http://www.sewingpartsonline.com/bobbin-case-babylock-bernina-brother-riccar-x59802101.aspx

I trust this helps you resolve the issue, often its just threading up and a bit of a break away for five mins, then fresh eyes, rethread carefully, checking the manual directions, and issue will resolve.

Jul 05, 2011 | Brother PS-1250 Pacesetter

1 Answer

Got a sewing machine from a garage sale with no manual it is a brother VX-1250 and got it all set but I can't figure out how to thread the bobbin.


Get a copy of your manual from brother-usa.com and it is usually free to download, it will show you how to thread your machine properly as each machine is different.

Sep 11, 2010 | Brother Sewing Machines

1 Answer

Brother VX 1250. The needle can't pick up the bottom thread from the bobbin.


Check the needle to be sure it is installed with the flat side facing the back of the machine.

Check the needle to be sure it is not bent.

Mar 02, 2010 | Sewing Machines

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