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I think the bobbin tension is off - I have large thread loops on the underside of the fabric when I sew

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It sounds crazy but if you have loops on the underside of your fabric it means your upper thread is not properly threaded (and vice versa for loops on the top of your fabric). So re-thread your top thread, change to a new needle if you've been sewing with it for a months and you should be good to go. Let me know if you need any more help.

Posted on Aug 24, 2010

Testimonial: "thanks for the suggestion. My sister-in-law suggested trying a new bobbin and rethreading - which together worked."

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1 Answer

I am sewing voile curtains, but the stitching keeps looping on the underside


Check your sample. Is it the top thread that is looping under the fabric? That is called bird nesting or thread nesting. It happens frequently if the top thread is not seated completely in the tension disk. It could also be a top tension problem.

Be sure to use a brand new needle compatible with the thread and fabric.
Remove the top thread from the machine.
ALWAYS RAISE the presser foot and rethread from the beginning.
Set the top tension to the midway point and test on a scrap of the same fabric. Adjust the top tension until the top and bobbin threads meet in the middle of the fabric. (Tightening the top tension will pull the bobbin thread up. Loosening the top tension will allow the bobbin thread to pull the top thread down.)

Jan 18, 2018 | Sewing Machines

1 Answer

The stitches on the underside are looping I’ve retreaded both the needle and bobbin and neither makes a difference


You are getting a thread mess under the fabric? Frequently, this occurs because the top thread is not fully seated in the tension disk.

Install a brand new needle.
Remove the top thread from the machine.
ALWAYS RAISE the presser foot and rethread the machine from the beginning.
If necessary, adjust the top tension so the top and bobbin threads meet in the middle of the fabric.

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Birds nest under the fabric big loops of thread top side looks good...

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Jan 04, 2018 | Sewing Machines

1 Answer

Tension on sewing machine


Check your stitch sample. The looping under the fabric is most likely the top thread. If so, this is call bird nesting or thread nesting. Most common cause is the top thread is not completely seated in the tension disk.

Remove the top thread from the machine.
ALWAYS RAISE the presser foot and rethread the top thread.
Set the top tension at the midway point (this can be tweaked later).

Test your stitch. Increase or decrease the top tension until the top & bobbin threads meet in the middle of your fabric.

What causes Bird Nests Superior Threads

Sep 06, 2017 | Sewing Machines

1 Answer

Needle stitch fine. Bobbin stitch loops.


First, try a brand new needle.

Second, consider using a better quality thread. By all means, AVOID old or bargain bin threads. Coats & Clark used to be a standard, but thread quality has improved over the past few years, so you may want to check out other brands like Aurafil, Superior, Isacord, etc. Also, cotton wrapped polyester thread releases thread lint that contributes to build-up of gunk in the machine. Some sewists have noted that they experience more sewing issues when using C&C threads. However, some machines will do better with certain thread brands than others, so some experimentation may be beneficial.

Third, check the stitch on your sample again. Generally, when thread loops appear on the underside of the fabric, it is the upper thread that is the problem. If loopy threads appear on the top of the fabric, it is the bobbin thread that is the issue. You can even use a different color in the top to help distinguish which thread is the problem.

Fourth, when threading the upper thread, Always Raise the Presser Foot during the threading process so the tension disk is released and the thread can seat properly. "Bird nesting" occurs when the thread is not seated in the tension disk.
Sewing Machine Thread Bunching Up Here Why

Birds nest under the fabric big loops of thread top side looks good...

Fifth, when the upper thread appears on the underside of the fabric, the upper thread tension is too loose. If the bobbin thread appears on the top of the fabric, the tension thread is too tight (or the bobbin thread is loose). Start out with the upper tension set at the midway point and tweak it from that point. The tension is ideal when both upper and bobbin threads meet in the middle of the fabric.

Also, remember that tension is not static--a tension setting for chiffon will most likely not work on cotton or denim. Get comfortable adjusting the tension to suit the project you are sewing.

..

May 24, 2016 | Sewing Machines

1 Answer

Bobbin tension trouble


Hi
When the tread gives trouble on the bottom of the fabric, it is the top thread that causes it.
Check your top tension.

If not your needle could be dull so u might have to change it.

Jul 15, 2015 | Sewing Machines

1 Answer

When I sew, the stitching is loose with large loops on the underside of the fabric making the bobbin thread slide out easily. How do I fix that?


Lift the pressue foot off the fabric. Hold the thread spool with one hand and lightly pull the thread hanging out the back of the needle. This should seat the tread into your top tension discs properly. Now try sewing again. If it still throws loops, you either do not have your machine threaded correctly or your tension on top is set to zero.

Sep 01, 2014 | Bernina Sewing Machines

1 Answer

Tension is loose underside


Loops appear on the surface (top side) of the fabric?
Reduce the tension by turning the upper tension control dial to a lower number. If the loops still appear on the surface of the fabric after you adjust the upper tension, the bobbin thread may be too loose. In this case, turn the screw clockwise, being careful not to over-tighten the screw, approximately 30-45 degrees to increase bobbin tension. After you adjust the bobbin thread, adjust the upper thread to match the bobbin thread.
Make sure you reset before your next project.

Apr 26, 2013 | Brother LS-2125 Mechanical Sewing Machine

1 Answer

Singer 301a...sews on top of fabric nicely...bottom is just loose loops of thread...it's like the bobbin is not sewing...I put 2 different colors in to see...top is perfect...on bottom of fabric I see the...


This is a tension adjustment problem. It's good to use two different colors of thread, like you did. From your description, the top thread (needle thread) tension needs to be tighter. As you tighten the tension of the top thread, you'll see that the top thread pulls the bobbin thread up into the fabric so it's no longer laying loose on the bottom of the fabric.

You'll need to have the pressure foot down when you tighten the tension. Tighten it a little, sew a practice seam, check to see what the stitch looks like. Tighten it a little more, sew, check, etc etc--until both top and bottom look the same--you shouldn't see much (if any) of the bobbin thread color on top of the fabric or the top thread color on the underside.

Let me know how this works for you, ok?


Robbie

Jan 25, 2010 | Singer Sewing Machines

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