How to adjust the bobbin tension?

Hello, Pat -

Which thread on your sewing machine are you referring to? With either the top thread or the bottom (bobbin) thread, the problem is most likely due to the tension.

Another reason for the top thread breaking could because the machine is not threaded correctly.

If you have the owner's manual for your sewing machine, check it for the settings for the top thread tension and for the correct threading. Also, check the manual for information on the bobbin (bottom) tension.

This web page gives some generic information on sewing machine tensions:
https://www.thespruce.com/easily-adjust-sewing-machine-tension-2821432

Another option is that you are using old cotton thread to sew with. Over time cotton thread deteriorates and breaks easily. I only know this from personal experience. :)

Generally, thread tension should be adjusted at the top thread. Only in extreme cases should the bobbin tension be adjusted.

http://www.singersewinginfo.co.uk/tension

How to Adjust Tension Sewing Machine

Liz Kettle adjusting your bobbin case tension 1 wmv

Fixing Top Load Bobbin

Sew What Up View thread Singer Stylist 513 threading correctly

check the video
https://www.youtube.com/watch?v=LEaJxFRis9o

1. Set the tension on the bobbin.
2. When you thread the upper thread do it with the pressure foot up.
While you are threading give slight tugs to check for snags. If there are snugs you must fix them.
3. Put the pressure foot down and adjust the tension to four. Give a tug. It should have tension but still allow the thread to flow.
(Look at your thread and look for fuzz on the sides. This indicates a bad quality thread. A good choice is embroidery.)
4. Make sure the needle has been installed going the right direction. Usually flat to the front or to the right side.
5. Turn the hand wheel while you hold the needle thread to the front.
The bobbin thread should come above the throat plate in about one turn.
NOW YOU SHOULD BE ABLE TO SEW.
LOOK AT INFORMATION ABOUT BOBBIN TENSION.

BRAND new Janome 1420qdc. New needle, doesn’t need oil. Will NOT wind a bobbin. Used almost an entire spook of thread doing this. At my wits end. HELP!

Hello

Set the tension on the sewing machine for the weight of the material you want to sew. The tension setting shows in the stitch on the material. Use the chart on the machine that matches types of stitches with suggested material tensions. An example of this is, the stitch to sew jean material is different than the stitch to sew silk.

Take the bobbin and wind the thread around it. Make sure the bobbin is empty and don't fill it too full of thread. A bobbin filled too full won't stay tightly spun.

Thread the string evenly on the bobbin. Move the thread back and forth evenly and in layers that are level. Many Singer sewing machines have a bobbin winder on the top of the sewing machine, and the consistency of how it threads can save you frustration later.

Find the hole on the bobbin that is located near the inside spindle of the bobbin. Take the thread sitting on the sewing machines spool and insert the thread in the hole from inside the bobbin to the outside. Set the threaded bobbin on the spool designated for spinning on the top of the sewing machine for some Singers.

Turn the side drive wheel slowly until the threaded bobbin has a layer or two of thread on it. Push down on the drive peddle and fill the bobbin, but don't thread it to the very edge. If the bobbin is too full the thread will release erratically. Cut the thread from the spool.

Drop the bobbin into the bobbin case under the area where the needle sews the material. Close the case and turn by hand the side wheel drive until the bobbin threads into the sewing machine. You can tell when the bobbin is threaded by the tiny piece of thread that juts out of the bobbin case where the needle goes up and down.

Grab the thread with your fingers and pull it out approximately 4 inches. Your bobbin is now spun and threaded.

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.
TROUBLE;UPPER THREAD KEEPS BREAKING;
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
TROUBLE;LOWER THREAD KEEPS BREAKING;
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
TROUBLE;MACHINE STARTED SKIPPING STITCHES;
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
TROUBLE STITCHES SHOWING LOOPS;
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.

Hi!

I think you are threading the top of the machine incorrectly. Make sure that what I'm saying is correct, use two color threads to sew with- and you will see that it is in fact the top thread that is bunching.

This might be a tension problem. Could be the bobbin is not threaded in the case right. First, check the threading of the bobbin and then check the stitch.

Next, adjust the tension on the bobbin case. There is usually a small screw on the case that can be tightened or loosened. I think you may need to adjust it a bit or adjust the top tension knob, just a small bit at a time. It the top does not change the stitch, then go to the bobbin case and adjust the screw to tighten the stitch a little bit more.

Please do rate this solution as FixYa and revert for further assistance.

Thanks
Rylee

FYI---- Loops on the bottom-- problem is in the threading..
Loops on the top--- problem is with the bobbin.

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