Question about Brother NX-400

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Thread tangling inside bobbin case catching on another part

There is a small rod shape part pointing toward the bobbin case. The thread catches on this rod while sewing and causes the thread to tangle coming out of the bobbin. It bunches up under the feed dogs and causes the machine to stall while trying to pull the material through.

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  • Brother Expert
  • 455 Answers

1. thread machine correctly.
2. make sure bobbin case in spinning in the case in the correct rotation. If the bobbin is spinning off of the bobbin incorrectly, "bird nesting" is the result.

Posted on Jul 21, 2014

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6ya6ya

6ya staff

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Posted on Jan 02, 2017

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Anonymous

  • 27 Answers

SOURCE: Brother Sewing Machine model:CS8150 bobbin thread problems

The top of the machine is not threaded correctly. First raise the presserfot then rethread the machine. Bottom looping is usually caused by a lack of top tension. There could allso be a bur on the hook.

Posted on Feb 23, 2008

Anonymous

  • 111 Answers

SOURCE: its like it is getting tangled in bobbin casing

loopy on bottom means upper threading or tension is wrong

Posted on Aug 23, 2009

bargainbox

Hassy

  • 1388 Answers

SOURCE: on underside of material thread is loose and not catching

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


Posted on Sep 02, 2009

Anonymous

  • 23 Answers

SOURCE: I can't keep the lower thread from getting tangled

Ensure that you have routed the bobbin thread properly. Also, if the bobbin case is not installed properly it will give you this problem. Ensure that the protrusion is touching the spring on the body of the machine.

Posted on Apr 13, 2010

Irene Tulloch

  • 498 Answers

SOURCE: I have a brother pe 770 and the bobbin will not

You need to sew the first stitch slowly. Lower the needle by hand and take up carefully. Pull the needle thread up and the bobbin thread should be caught in the formed loop and come with it. Pull them both to the back of the machine and sew.

Posted on Dec 15, 2010

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How do i fix the top thread just tangling, looping on the shutter race?


1. Make sure that you are using the right bobbin case. (LX3125) 2. Adjust the tension of the bobbin case. (I've sent a guide for this) Your's is considered the older style.
3. Make sure the bobbin that is used is the right one. If it is too long or too wide it will cause problems.
4. When you insert the bobbin case make sure the lock handle goes down flat with the bobbin case. Also, feel the bobbin case for rough snags.
5. Replace the needle. Insert it the new one in the right direction.
6. Thread the machine (while pressure foot up) according to the directions. While threading give small tugs to check for snags.
7. Place the tension on four. It is ok to feel by hand if this is excess tension.
8. While turning the hand wheel towards you the bobbin thread should rise above the throat plate.
9. This should be ok now. Try it on some old rags. Don't forget to set that bobbin case.

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Jun 08, 2015 | Brother LX3125 Sewing Machine

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Y does my top thread pick up on hook and when it catches bobbin thread it gets tangled up on top of bobbin


Basic Tips for All
  1. Always turn the handwheel TOWARDS you (counter clockwise) as turning it in the opposite direction (away from you, clockwise) may knock the timing out requiring repair from a service center.
  2. Always be sure your presser foot is in the DOWN position before sewing. Sewing with the presser foot in the up position will cause your thread to tangle and your bobbin to jam.
  3. Change needles regularly (after 16 hours of use) as dull/weak needles can cause damage to your machine and fabric. Only use SINGER needles on your SINGER sewing machine.
  4. Always be sure you are using the correct bobbin for your machine. Class 66, Class 15 and Class 15J bobbins look very similar. However, using the incorrect bobbin class in your machine can cause damage.
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May 21, 2015 | Sewing Machines

1 Answer

Why does my thread keep bunching up?


That is called "thread nesting," and several things can cause it. The upper thread enters the bobbin area during sewing, catches the bobbin thread, and as the needle goes up, pulls the stitch tight. Something is catching the upper thread as it goes around. The most common reasons are the bobbin or bobbin case (or both) is improperly inserted; the bobbin is warped (roll it down a flat surface--if it wobbles, it's warped), either the case or the bobbin is not seated evenly, there is a rough spot on the bobbin case that is catching the thread, or your bobbin is loosely/badly wound. You need to rule out the possibilities step by step until you find the cause. First, review your threading procedures from start to finish, using your user's manual. Then, without fabric, turn the hand wheel by hand (ALWAYS towards you) to see if you can see it start to catch. The top thread should rotate smoothly in the bobbin area. You should be able to pin-point the cause that way.

Sep 24, 2014 | Singer 2517 Mechanical Sewing Machine

2 Answers

Worked great until the needle broke and now the bobbin thread bunches up


Hello

Clean out the bobbin area if there are any thread tangles there.

If the bobbin does not fit snugly into the bobbin case, then get new bobbins. You need class A or 15 and they do not cost very much. Make sure they are plastic and not metal.

Refer to the maintenance section of the manual - see the configuration of the bobbin case and shuttle race? The bobbin case as an extending arm and the race a notch. When inserting the bobbin case into the shuttle, turn the handwheel so the needle is at it's highest position. Then lift the lever on the back of the bobbin case and insert the cast into the shuttle, arm pointing straight up toward the bed of the sewing machine.

Now thread the machine with the presser foot up - always - and see if the tangling stops.


There should be a tension setting for your bobbin thread, as well as your top thread. It sounds to me like your bobbin tension setting is not in sync with your top thread.

most common solution to this is to remove the top thread completely from machine and re thread it with the presser foot UP not down. This will allow the top thread to engage properly in the top tension disc

Aug 10, 2011 | Brother LS-2125 Mechanical Sewing Machine

2 Answers

I am sewing scout badges on a uniform and when I sew there is a bunch of needle thread bunched up on the bottom (the top looks fine). And the needle thread gets all caught up around the bobbin.


Clean out the bobbin area if there are any thread tangles there.

Refer to the maintenance section of the manual - see the configuration of the bobbin case and shuttle race? The bobbin case as an extending arm and the race a notch. When inserting the bobbin case into the shuttle, turn the handwheel so the needle is at it's highest position. Then lift the lever on the back of the bobbin case and insert the cast into the shuttle, arm pointing straight up toward the bed of the sewing machine.

Now thread the machine with the presser foot up - always - and see if the tangling stops.

When you forget to lift the presser foot before threading the machine, the tension control does not open to capture the thread. Then when you begin to sew, the top thread has no tension, and the bobbin thread, which does have tension, pulls the top thread to the bottom in messy loops.

Jun 25, 2011 | Kenmore Sewing Machines

1 Answer

I have a brother pe 770 and the bobbin will not catch the thread. The thread will wrapped and tangled up around the bobbin case and bobbin, but will not catch the bobbin at all. I chcked the needle, it is...


You need to sew the first stitch slowly. Lower the needle by hand and take up carefully. Pull the needle thread up and the bobbin thread should be caught in the formed loop and come with it. Pull them both to the back of the machine and sew.

Dec 14, 2010 | Brother PE770 Computerized Sewing Machine

1 Answer

What causes the thread onthe under side of my machine sewn project to bunch up and become tangled?


Make sure before you close the bobbin case, that the whole piece of thread is pulled out and put towards the back of the machine, if its bunching up dont worry about it, it might just be the way the machine is. But if it is causing problems while sewing then check the bobbin thread is not tangled inside :) Hope i helped

Oct 28, 2010 | Sewing Machines

1 Answer

I am having a problem with my Shark Intell-Sew that I've had a few times before but I've always been able to resolve it, and this time I can't. The machine jams, and the book says it's usually because the...


Many machines today have a horizontal thread delivery for the needle thread. Be sure and place the thread spool with its tiny notch on one end (the notch is used to secure the loose thread end when not in use) facing toward the far right side of the spool holder and not facing toward the left side where the thread will be guided off the thread spool into the vertical tension discs and toward the needle. Some times this tiny notch will catch the thread causing undue thread tension on the needle thread. Placing the thread spool facing toward the right seems to help the thread guide off the spool without catching in the tiny notch.

Also hold onto the needle thread and the bobbin thread, giving slight hand tension to both, for the first few stitches you make in your fabric. With the first uptake of the needle, the needle’s thread tail and bobbin tail are drawn down somewhat loosely into the bobbin case and can become tangled and jam if not held onto briefly. Be sure the bobbin thread comes out of the needle plate in the area it is intended to. After winding a new bobbin, it may help to put the bobbin in its bobbin case and just raise the machine needle by hand just enough to allow the needle to bring up the bobbin thread to the top. Give the bobbin thread and needle thread held together a slight tug so that they both lay out behind of or to the side of the needle. If you have left off the needle throat plate for last (for those machines that allow the throat plate to be removed) when placing the throat plate back on the machine, be careful to guide the bobbin thread through the hole or space in the needle throat plate so the bobbin thread lies on top the plate.

Using the right machine needle for the fabric helps too. Generally, ball-point needles work great for knits and sharp-pointed needles for woven fabrics. Using the smallest size needle that makes the best stitch for the type of fabric seems to work well for most fabrics to produce clean even stitches.

Using the best quality thread helps. The bargain-priced threads found piled in sale bins at the fabric store work great for hand sewing but not for machine sewing. Lesser quality thread make lots of fuzz as it passes through the needle and can jam the machine. Many sewing machine repair folks hate the thought of us using a can of compressed air to blow out fuzz from the tiny spaces of the machine, particularly the newest digital electronic machines, but a spritz or two of compressed air in the vertical thread slots that hold the tension discs and in the bobbin case itself, usually can dislodge bits of fuzz from these spaces. Although compressed air is not recommended for a new machine the thought is offered for you to consider for older, mechanical machines.

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1 Answer

Bobbin case catching-tangling thread


It sounds to me that you might have the wrong type of bobbin in the case. The top of the bobbin should not be higher than the case. Thread will slip through the space and cause problems. Also unevenly wound bobbins will also cause this symptom.
Or your losing tension which you will have to adjust tighter.

Jul 23, 2008 | Singer 3116 Simple

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