Question about Brother LS-2125 Mechanical Sewing Machine

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Bobbin thread is loose and looping

How do I correct the problem of loose thread in my bobbbin. It also loops a bit. The manual said something about tension and to fix the little screw. Well they forgot to say which screw and where it is located. There are lots of screws on my machine and I have no idea which one they are talking about. Can you help? Thanks.

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  • Presious08 Dec 31, 2007

    I have the same problem, but it is a singer. The stitch on top is perfect, but the thread from the bobbin is loopy and loose.



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Okay it is the tension scrow on the bobbin. There is a small screw on the bobbin and by tightening it it gives you more tension on the bobbin.

Posted on Dec 24, 2007

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My sewing machine is a Singer and does not have a removable bobbin case of the thread loops a lot!...had the same problem with my last Singer sewing machine....they don't make them like they used to...quality is not in the picture anymore, it seems.

Posted on May 25, 2008


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Related Questions:

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

My Bernina Artista 185 has been looping the top thread on the underneath side. Is this a tension problem? No amount of adjustment seems to correct it. What can I do to correct the looping problem?

It is a tension problem. My advice is always to double check in the manual that you are threading correctly. With loops underneath, your tension is too loose, or the bobbin is not seated properly.

Nov 18, 2015 | Bernina Sewing Machines

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Why stitches on top are great but bottom are loose and loopy?

Check your upper threading. Make sure it's between your tension discs. Remember loops on bottom, something is wrong with upper threading/tension. Loops on top something is wrong in the bobbin area (like the bobbin being in upside down or a loose bobbin tension spring)

start by rethreading the top thread with the presser foot UP.

Jun 11, 2014 | Singer Quantum 9910 Computerized Sewing...

1 Answer

Silver 302 sewing machine

If it is your top thread looping then the top thread is too loose and you need to tighten the top tension. Usually the higher the number the tighter the thread. If it is the lower thread looping to the top then try loosening the top thread first by lowering your tension number. If this doesnt work then depending on whether or not you have a separate bobbin case, which has a small flat screw 3-4mm diameter which can be turned by the flat of your thumbclockwise to tighten, if looping and anticlockwise to losen. Normally only the top tenison needs to be fiddled with. If you have to change the lower(bobbin) then one way of checking a good tension is to let the bobbin drop whilst holding the thread and it should drop comfortably with a small pull on the thread a little bit like operting a yoyo:)

Mar 27, 2014 | Sewing Machines

1 Answer

Upper thread looping around bobbin

make sure your needle is positioned correctly? not too high and not too low.

Jan 10, 2014 | Brother Sewing Machines

1 Answer

Whta is the answer to the curvy's thread/bobbin problems. super infuriating

If by "bobbin thread is usually too loose." you mean that you are seeing loopy stuff on top of your seam... then first you need to make sure your bobbin is un-spooling in the correct direction.

Also make sure that the tension spring on your bobbin case is not missing it's screw. Don't mess with the tension there yet... loosen your top tension first... sew on scrap fabric of the same type as your project. Loosen the top tension until you stop seeing loops on top of your seam. If you have loosened it enough to see loops on the bottom... tighten it a bit.

If all else fails make sure you re-thread the top thread with the pressure foot up position so you make sure you are getting the top thread in the tension discs and try test sewing again.

Jul 26, 2012 | Singer Curvy 8770 Electronic Sewing...

2 Answers

My bobin thread gets tangled and loose

have you checked the tension? In the older machines you could adjust the thread tension by tightening the screw on the side of the bobin case. With alot of the newer machines you have to lift out the bobbin and then lift out the casing to adjust the screw on the underside of the casing.

Oct 28, 2010 | Sewing Machines

1 Answer

Machine will not catch bobbin thread

This is probably an upper thread tension problem.

Manually cycle the machine watching the action with the bobbin covers off. The needle should come up a bit and put a loop out for the little point on the shuttle to come around and catch. Also check needle is in correctly and fully seated.. Groove should be toward you.

If the cloth is very light, the friction of the thread in the cloth may NOT be enough to allow the loop to form. You may have to hold the needle thread a bit to add to the friction so the loop/buldge can form.

Apr 14, 2010 | Euro-Pro 373 Mechanical Sewing Machine

1 Answer

My Pfaff sewing machine has started to loop the top thread underneath. Tried fixing the tension on the bobbin thread as they state in the manual, but the problem still persists. Any suggestions?

If the thread is looping underneath, you're top tension may be too loose or the thread may not be in the take-up lever. If it's looping on top, double check that the thread is in the bobbin tension or that the bobbin tension isn't too loose.

Oct 02, 2009 | PfaFF Creative 7570

1 Answer


looping thread on the bobbin side means that the upper tension is too loose... make sure it's threaded correctly.

Jun 14, 2009 | Feiyue FS288

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