Question about Brother LS-2125 Mechanical Sewing Machine

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Bobbin thread is loose what can I do to fix this problem?

The machine at top is smooth but will not connect in the bottom. The thread is loose and knots and will not connect any thread at all what is wrong?

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Make sure that the needle is correct inserted correctly, then check the threading as it will be the top that is wrong not the bobbin. cheers

Posted on Nov 20, 2009

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Posted on Jan 02, 2017

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How to fix bobbin thread on computered memorycraft 9000 sewing machine ?


1)Check that your bobbin does not have a nick in it where the thread can catch and won't feed smoothly.2) make sure the upper and bobbin threads are the same.3) pull out the bobbin case and chect to see if there is a clump of lint.4) make sure the feed dogs are moving the fabric through smoothly,some fabrics can get caught on the dogs and make the bottom thread get loopy.5) check your needle,if it's bent or has a bad tip,it can mess up the stitch.

Aug 15, 2014 | Janome Memory Craft 9000 Computerized...

3 Answers

Loose bobbin tension


the bobbin tension is set by that small spring plate that you pull the thread under after you put the bobbin back in the carrier / holder
a very small turn of that screw makes a big difference ob the tension unlike the needle thread tension
mostly the problem ( you never bothered to mention the symptom ) is bird nesting under the fabric which is the needle thread tension not tight enough

Jul 06, 2017 | Brother SE-270D Computerized Sewing...

1 Answer

The tension on the bobbin is giving big loops and then breaking


This could be one of the following:
  • wrong bobbin for the machine
  • bobbin loaded the wrong way - must rotate anticlockwise when you pull the thread
  • thread not into the tension spring/device on the bobbin holder correctly
  • bobbin wound badly, uneven tension, loose or uneven across the bobbin
  • poor quality or old dry brittle thread could cause the breaking (but the loops is definitely tension issues).
This is a top loading bobbin machine machine and you can download a manual from
http://www.singerco.com/accessories/manuals.html

Here is the threading diagram from the manual.

tally_girl_21.jpg It is important to click the thread down into the tension spring on all top loading bobbin machines and then pull gently on the thread to check that it is under tension, you should feel firm resistance when you pull the thread. If not, then take it out, and try again.

Other thing to look at is how the bobbin is wound. It is necessary to wind a bobbin smoothly and with some tension on the spool as the thread comes off it. Best analogy is the garden hose reel. If you wind it up and don't control where the hose goes onto the reel it will all lump up in the middle, and you won't get all the hose onto it. And then when you go to pull the hose out, it will jam and be difficult to pull. Same with bobbin thread. You want a nice neat even fill across the whole width of the bobbin, not just the middle. To achieve this make sure you use the bobbin winder tension disc when winding. Also use the spool cap on top of the thread spool to stop it from bouncing around as it unwinds - the thread will then wind off around the spool cap and this keeps it running smoothly and not twisting and jerking. If you don't have a spool cap then put the curved handle of a pair of scissors on top of the thread spool to tension it while you wind the bobbin. Also watch the bobbin as it winds, give the thread a nudge with your finger to control the fill onto the bobbin so it winds top, bottom and middle of the bobbin evenly.

I would suggest the following:
clean out the race following the manual directions to remove the bobbin holder, clean in this area, replace it. Wind a fresh bobbin and then load it into the machine, following the manual instructions carefully. Also thread the top of the machine following the manual, put in a new sharp needle from the pack, turn the top tension dial to a medium number (often 5 if dial goes from zero to 10).

Now test sew again. Look at the seam, if you have loops on the bottom of the fabric, underside, then the top thread tension is too loose or not in the top tension discs fully. Generally you should not need to adjust the tension on the bobbin thread for these machines.


Apr 13, 2011 | Singer 5050 Mechanical Sewing Machine

2 Answers

Singer 301a sewing machine does not sew for more than 2 secs...top thread just knots into a huge ball on bottom of fabric...everything is threaded correctly and all tension set well...next step is trash...


Recheck the top thread and bobbin tension for equal balance of thread when sewing. The knotting of thread problem is usually because the tensions are too tight or too loose and/or thread may not be properly threaded. Another reason is when the bobbin thread is wind imbalanced it will cause the thread to knot-up when sewing. This problem is notorious when the bobbin is winded within the bobbin case on some machines. The bobbin thread need to be wind smoothly in the bobbin to avoid this problem.

Jan 24, 2010 | Singer Sewing Machines

1 Answer

When i sew, the stitching on top is perfect, but the thread is all bunched and loose on the bottom.


Your bobbin may not be threaded through the bobbin case correctly, OR the tension on the bobbin case my be much too loose allowing the bobbin thread to pull out too quickly. There should be a tiny screw on the bobbin case that you can adjust to allow the thread to feed smoothly without catching & yet not pull out too freely. You may have to try this out on a scrap piece of fabric to find the perfect setting - both sides should be smooth without pulling from either direction. Oh - typically turning to the right tightens, left loosens ie: "righty-tighty, lefty loosey" best of luck hope this helps!

Nov 11, 2009 | Singer 3116 Simple

2 Answers

I have the Brother ls2125i and LOVE the machine...in the middle of sewing, it started making very big loops on the bottom stitch and they do not catch the thread from the needle. Is it the tension?...


Here are some things to try:
Big loops are actually easier to solve usually. 1st know this: Loops on bottom means the top is too loose or the bottom is too tight. With loops that big its probably the top is too loose. 1st look in tension disks, there is likely a chunk of thread in there. A toothpick is handy to dig it out (the flat kind) 2nd make sure that the thread is getting between the disks when threaded. 3rd Make sure the thread is in the take up lever (the thing that moves up and down in front and not the needle bar or any part of the needle bar.) If neither, then the bobbin case could have a burr on it and the thread is hanging on that burr. Also the bobbin case may be in wrong. I hope this helps
Tension:
If the thread is loose on the bottom of the fabric, it's actually the top thread is too loose. Think of 2 little elves playing tug of war in your machine, one on top and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension
Thread test
Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no matter how much thread you pull, your thread is good. If that your machine passes that test, we can go to step 2. If not, try different spool of thread, do the same test until you get a smooth pull (tip: always check your thread this way when you thread your machine)
Step 2:
Pull on your threaded bobbin thread while it’s in the machine. Does it pull smooth and even? If so, go to step 3. If not, try a new bobbin (bobbins get bent or distorted if wound too tight).
Clean thoroughly in the hook and bobbin case area and oil 1-2 drop is all.
Kent

Mar 22, 2009 | Brother LS-2125 Mechanical Sewing Machine

1 Answer

My bobbin thread keeps looping up on the bottom, and after adjusting the tensions both ways I can't get it to stop making a mess.


try this:
Tension:
If the thread is loose on the bottom of the fabric, it's actually the top thread is too loose. Think of 2 little elves playing tug of war in your machine, one on top and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension)
Thread test
Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no matter how much thread you pull, your thread is good. If that your machine passes that test, we can go to step 2. If not, try different spool of thread, do the same test until you get a smooth pull (tip: always check your thread this way when you thread your machine)
Step 2:
Pull on your threaded bobbin thread while it’s in the machine. Does it pull smooth and even? If so, go to step 3. If not, try a new bobbin (bobbins get bent or distorted if wound too tight).
Clean thoroughly in the hook and bobbin case area and oil 1-2 drop is all.
Jamming bobbin case:
If it is damaged from turning out of place once, it could have rough spots on it that makes the thread hang on it, and keeps making it turn over and over. Use a finger nail board (fine sanding) and smoothall rough spots. Then reset the bobbin case taking care to put the notch in the bobbin case in alignment with the proper spot in the machine (basically 5 o’clock) when looking at the round area where the bobbin case goes

Mar 20, 2009 | Brother LS-2125 Mechanical Sewing Machine

1 Answer

Upper thread knots up with bobbin thread when sewing a stich


Thread test
Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no mater how much thread you pull, your thread is good. If that your machine passes that test, then let me know, we can go to step 2. If not, try different spool of thread, same test until you get a smooth pull (tip: always check your thread this way when you thread your machine)
Step 2:
Pull on your threaded bobbin thread while it’s in the machine. Does it pull smooth and even? If so, go to step 3. If not, try a new bobbin (bobbins get bent or distorted if wound too tight).
Clean thoroughly in the hook and bobbin case area and oil 1-2 drop is all.
Thread knotting on the bobbin can be a lot of things but here's some guidance:
Tension:
If the thread is loose on the bottom of the fabric, it's actually the top thread is too loose. Think of 2 little elves playing tug of war in your machine, one on toip and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension)
Jamming bobbin case:
If it is damaged from turning out of place once, it could have rough spots on it that makes the thread hang on it, and keeps making it turn over and over. Use a finger nail board (fine sanding) and smoothall rough spots. Then reset the bobbin case taking care to put the notch in the bobbin case in alignment with the proper spot in the machine (basically 5 o’clock) when looking at the round area where the bobbin case goes.

Mar 16, 2009 | Sewing Machines

2 Answers

My basic singer 5932 machine that I've had for about 11yrs is acting up on me....Never had a porblem til today. Probably an easy one for you experienced sewers. The thread underneath is very loose and...


Tension:
If the thread is loose on the bottom of the fabric, it's actually the top thread is too loose. Think of 2 little elves playing tug of war in your machine, one on top and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension)
Also look at:
Thread test
Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no mater how much thread you pull, your thread is good. If that your machine passes that test, then let me know, we can go to step 2. If not, try different spool of thread, same test until you get a smooth pull (tip: always check your thread this way when you thread your machine)
Step 2:
Pull on your threaded bobbin thread while it’s in the machine. Does it pull smooth and even? If so, go to step 3. If not, try a new bobbin (bobbins get bent or distorted if wound too tight).
Clean thoroughly in the hook and bobbin case area and oil 1-2 drop is all.

Jan 19, 2009 | Sewing Machines

1 Answer

Bottom (bobbin) thread suddenly loosens


Good morning,

A few steps to help you troubleshoot:
  1. Bobbin in the right direction: when looking at the bobbin in the bobbin case, pull the thread tail. The bobbin should turn clockwise.

  2. One of the biggest causes of what you describe is simply a burr/rough spot on the needleplate or hook.

    Remove the needleplate from your machine and inspect the opening for any rough spots... run your finger over the area to feel for any sharp bits. If you discover some rough spots, they can be smoothed using a fine emery cloth. Use this gently - don't want to distort needle opening, just smooth the roughness.

    If no rough spots on needleplate, open the bobbin cover and turn the handwheel towards you until the hook (little pointy part of bobbin area) is towards the bottom of the machine. Run your finger over the point to feel for any rough spots. Again - a fine emery cloth can smooth this. Be VERY careful to not flatten the hook - just a little smoothing to get rid of rough bits. Too much can ruin the hook. If you're uncomfortable with this, don't hesitate to take to your Pfaff tech and point out the rough bits.

  3. Hold the bobbin case/bobbin between finger/thumb, making sure you're not pressing on the bobbin tension (little flat metal piece on side of case). Pull the thread smoothly out of the bobbin case to see if you feel any little glitches. If you do, there may be a bit of fuzz/broken thread trapped under the bobbin tension.

    You can loosen the large setscrew on the side of the case to allow you to blow out whatever may be trapped.

  4. While your top thread may appear fine, there may be a bit of fuzz or broken thread wrapped around the take-up lever. This would interfere with the smooth feeding of the upper thread, also causing an inconsistency in the bobbin.

    Use a flashlight and look down into the top of the machine/takeup lever area. You may be able to see a bit of thread and remove it. If you can't see an offending bit, try "Flossing" your upper thread path by grasping the thread close to the spool and after it comes out of the needle. Run the thread back and forth through the thread path to see if you can dislodge anything

  5. If none of the above help, we'd suggest you have your local Pfaff authorized tech take a look. It's always a good idea to take your machine to it's respective authorized service person as they'll be the ones to know the most about it and have access to any repair parts.
Please don't hesitate to respond if you need further help or clarification.

Happy sewing,
Kim & Linnette

Jul 10, 2007 | PfaFF Hobby 4260

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