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Looping thread under fabric

I've tried everything, changing the tension on the bobbin, adjusting the tension on the top thread, cleaning and lubricating the hook and it keeps jamming underneath the fabric. The machine was also working fine, then just started doing this half way through my project. Any suggestions?

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6 Suggested Answers

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SOURCE: bobbin tension

This is an issue of your upper thread tension, so take a look at this generic tension solution

If you are in a pickle with your bobbin case, check top tension and bobbin case are free of lint, reset the top tension to 4, and adjust the bobbin tension to suit......some more detail on how to do that, is here

Bargain Box

Posted on Jan 30, 2008

  • 9 Answers

SOURCE: lost my manual for my Brother CS-100-

Here is a site for the manual. Just click get manual, register for free on the site, then download it. It works great!

Posted on Jan 05, 2009

  • 202 Answers

SOURCE: Thread is bunching underneath fabric

Needle in correct? Be sure your bobbin is not in upside down and turning the wrong way. Possibly the hook that the bobbicase fits in/on has been hit by a needle and caused a burr that is catching the thread as it comes around. The burr would have to be polished off or hook replaced. The machine could be slightly out of time also.

Posted on Feb 11, 2009

  • 6 Answers

SOURCE: Singer CG 550 Top thread keeps wraping around the bobbin and jam

Have you checked the top thread is correctly placed in the spring of the bobbin case?

Posted on Feb 21, 2009

  • 1 Answer

SOURCE: looping underneath

I watched a 'You Tube' demo that showed ........if you loosen or tighten the very small screw at the base of the bobbin this gives you the correct tension & stops the looping under the fabric........I didn't even know this screw existed ! It is trial & era at first re the correct tension but you do get there.... the art is to do it in small mini you hardly move it ! Thanks to 'You Tube' I can now get on and finish my drapes !

Posted on Nov 24, 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

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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

2 Answers

Why is the bobbin thread bunching up?

if your saying that your bobbin thread is balling up under the platen plate , this is a sure sign that your top thread tension is not correct and there isn't enough tension to pull the bobbin thread up from below

Mar 24, 2016 | Sewing Machines

2 Answers

How do you set the bottom tension and/or where is the thread clamp

Be very careful adjusting the tension on the bobbin case. Generally, most tension issues are regulated using the upper tension adjustment unless the bobbin case is broken or someone has attempted to adjust it incorrectly. In any event, adjustments to the bobbin case should be made ONLY 1/8 of a turn at a time--then do a test stitch. Before making any changes, mark with a permanent marker where the screwdriver slot meets the bobbin case in the event you have to return it to the original position.

If the top thread is looping or knotting under the fabric (bird nesting), the upper thread is too loose or it is threaded incorrectly.

If the top thread is pulling the bobbin thread to the top of the fabric, the upper tension is too tight.

Tension is ideal when both threads meeting in the middle of the fabric.


Dec 11, 2015 | Sewing Machines

2 Answers

Top thread too tight. Bobbin thread too loose. Bobbin thread bunches up underneath material. The feeder teeth can not feed material through

first thing first - thread inside bobbin should be tightly wound in. Insert bobbin into bobbin case and thread through slot and under the spring. Spring has small screw which regulates the tension. Hold the thread like yo-yo and jerk a little down-up. It should drop just a little (not run down) - that is usually required bottom thread tension,
if not, regulate with the screw. Set top thread tension 3 and sew. If still looping under, increase the top tension higher till the looping disappears. .

Nov 03, 2015 | Sewing Machines

1 Answer

How do I adjust tension on a Necchi Lydia 510 sewing machine?

loops under fabric means top tension needs to be tightened
try cleaning the top tension dial with some unwaxed dental floss and see if that helps. if it doesn't then the tension dial may need to be replaced
also check to make sure the spool of thread is not getting caught on the spool holder
also try a new needle--one that is correct for the fabric being sewed

Feb 10, 2015 | Necchi Sewing Machines

2 Answers

New Home ss2015 machine. I am having trouble with the thread tension. I have loops on the bottom. I have cleaned the bobbin case, changed the needle, re-threaded and moved the upper tension all the way up....

try adjusting the top tension to 3 & if it doesn't stop the looping, try 4 but I wouldn't go any higher than 5,, if changing the top tension doesn't help then I suggest taking the machine in to have it serviced. the bottom tension is more difficult to do,, it's also very possible that the top tension dial is messed up & needs replacing. only a sewing machine shop can tell for sure.

Mar 02, 2012 | Sewing Machines

1 Answer

The bobbin thread is loops on top of the fabric even when the top thread is loosened to 2

if you've taking the machine in 4 times to be fixed,,sounds like you need a different sewing machine repair shop.
have you tried changing needles?
have you tried rethread the top & bobbin thread
is it possible the bobbin thread in not correctly inserted in the bobbin case?
try a top thread tension of 5 & see what happens?

Jan 20, 2012 | Brother Sewing Machines

1 Answer

I am experiencing tension issues. Same fabric and thread, worked with the first spooling of the bobbin. Re-spooled the bobbin and now the tension is all messed up. Cannot tighten, and it's gathering...

Good day!

please try this simple tips:

Good day!

A sewing machine operator can often help themselves when their machine does not operate properly.
Here are some simple instructions, which if properly used can save time and mechanics service calls.
This could be trouble;================Do this;
1.Top tension to tight================loosen tension 1 turn
2.Machine improperly threaded=========check threading
3.Thread twisted on guide post========"
4.Thread twisted out of tension======="
5.Take up spring bent or broken=======Check action of spring
6.Thread jumped off pull off finger===Check threading
7.Needle bent or burred===============new needle
8.Bad cone of thread==================try another cone
1.Bobbin tensionspring to tight=======Loosen tension slightly
2.Bobbin threaded wrong===============check threading
3.Bobbin wound to tight or uneven=====try new bobbin
4.lint or thread on bobbin case=======clean inside case
5.Lint or thread inside hook==========clean inside hook
6.Bobbin case nicked bent or burred===check/change case
1.Needle bent or burred===============change
2.Needle set in crooked===============Check
3.Thread jumped off take up spring====check threading
4.Thread jumped off pull off finger===check threading
1.Forming loops on top of cloth=======Tighten bobbin tension
======================================or loosen top tension.
2.forming loops on bottom of cloth====Tighten top tension
3.Bobbin placed in case incorrectly===remove and replace
4.Bobbin thread slipped from under====check threading of
tension===============================bobbin case
5.Lint or thread in top tension=======clean between tension discs

Thank you and good luck.

Jun 07, 2011 | Brother CS-6000

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