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I cannot tighten the bobbin tension. when I sew a seam , the thread pulls right out.

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  • Brother Master
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The screw on the bobbin case---turning the screw to the left tightens
turning the screw to the right loosens

Posted on Sep 28, 2010

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Posted on Jan 02, 2017

  • 40 Answers

SOURCE: The top thread is laying flat on the fabric, so

You need to decrease your top tension to fix this problem.

Posted on Jan 29, 2011

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Try sewing but bottom thread on fabric is crumpING UP


needle thread tension is not adjusted up properly tighten the setting until you have resistance when you pull the thread to thread the needle

Oct 02, 2016 | Sewing Machines

Tip

Setting Sewing Machine Tensions


When you sew you want a nice sturdy seam, one that won't pull apart or leave gaps or cause puckering. To get this it's important to have the tensions set correctly. Many seamstresses get confused about how to set their tension. It's a fairly simple process once you understand a few basic things.

BASIC LAW OF TENSION to form the stitch: The UPPER thread tension changes the look on the UNDERSIDE of a seam while the BOBBIN tension, the bottom tension effects the appearance of the TOP SIDE of the seam. That is quite opposite of what most people think. Basically what you want is for the top and bobbin tensions to equal so that the stitch forms half way between the two.

If you can see threads from the bottom side of the stitch showing on the TOP side of the seam, like the graphic below, then either the BOBBIN tension is too loose or the TOP tension is too tight.

If there are loops on the bottom side of the seam, like the illustration below, then the TOP thread tension is too loose, or the BOBBIN tension is too tight. Typically the TOP tension is too loose.

If there is puckering on the top side then most likely the TOP tension is too tight, though it may also be the the BOBBIN tension is way too loose.

So how can we tell which it is? The best way its to begin by taking a scrap piece of the fabric you will be sewing on, or at least the same type of fabric, picking the widest zigzag stitch possible with a medium to long length of stitch and sew several inches. Now examine the seam remembering which is the top and which is the bottom. If it does not look identical on both sides then one of the tension settings is wrong. (it is also possible that the needle is the wrong type but for the moment let's assume it's the tension).

If there's a problem with the stitch you can use the above rules to figure out which tension is off. However, as the top and bottom tensions work together let's begin by going through a basic check-off list.

First examine the threading of the upper thread and make sure it is correctly following the path and isn't catching on something. This is really important when you think you've looked through everything and just can't 'see' the problem. Taking the time to go through these steps can save you a lot of pulled hair!

Next pull out the bobbin and examine it in it's case. Are the threads would around it evenly or are they all jumbled and crisscrossed? Jumbled up is a BAD thing. Try a different bobbin that is wound correctly. Now examine if the thread is coming out of the proper place, through the tension slot. Pull on the thread to see if there's total resistant. If so, something isn't right. But it can also be a problem if there is no resistance so let's now do this test.

Suspend the bobbin in it's case by the thread. Let it dangle there is space, still holding it by the thread as if it was a yoyo. It should dangle there with a little slipping, the length of thread between it and your fingers getting a bit longer. If it hits the floor there's no resistance! You have NO tension. That is BAD. Now, while still dangling it gently flick your wrist like you're holding a yoyo and wanting it to drop down a little bit, which is exactly what it should do if the tension is correct. If it doesn't release any thread at all, doesn't drop down a bit then the tension is too tight. Most bobbin tensions are adjusted by turning the little screw on the casing next to where the thread comes out. (Make sure that the bobbin turns in the case the right direction too which is the same direction of the slot!)

If the bobbin drops a lot it is too loose and you will need to tighten it a bit. Remember that a gentle flick should allow more thread to come out but not reel out. There should be some resistance.

Now that we have the bobbin correctly adjusted place it back in the machine and sew another test seam and examine it. By using the rules at the beginning of this tip determine if the upper tension is just right, too loose or too tight. Adjust the upper thread tension accordingly, first raising the pressure foot then turning the dial or however your machine adjusts tension. The higher the number the tighter the tension and vice-versa.

So that you know what the upper tension should feel like pull on the thread at a point BEFORE it goes through the needle first. Pulling after it goes through the needle puts a bit more tension on the thread and I want you to feel the tension before that point. If the tension is too tight and you pull on it after it goes through the needle it may break the needle if it's a small sized needle. You should feel some resistance. You shouldn't have to tug hard on it to pull more thread through but it also shouldn't reel out without any resistance. If the thread is breaking either the tension is very high or the thread is catching somewhere. Check the threading as well as look to see if the spool is turning freely on the spindle. Sometimes the thread will catch on the spool itself. When you buy a new spool of thread remember how the end was through a tiny slot on the side of one end? If that slot is on the bottom of the spool on the spindle it can sometimes catch the thread as it turns. Simply turn the spool upside down and re-thread the machine if needed.

Now once more do a test seam and examine it. Follow the above steps until the top and bottom of the zigzag are identical - perfect!
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on Jul 01, 2011 | Sewing Machines

2 Answers

How do I fix a bobbin tnesion problem>


Bobbin tension is one of the biggest problems most sewing machine operators have. Check information sent for assistance on this.
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Jul 23, 2015 | Sewing Machines

1 Answer

Top tension has to be turned all the way down to get good stitch, then thread gets caught in bobbin and lower hooping on thread..


Grab some scrap fabric of the same type you'll be sewing. Tighten your top tension and test sew until you see until you see the top thread of a seam go like a straight line and the bobbin thread loops on top of the seam. Then back off of the top tension until those loops disappear.

If you never see it the top thread go like a straight line... your top tension needs to be cleaned... and make sure you have the pressure foot UP when you thread the upper thread.

Aug 03, 2012 | Sewing Machines

1 Answer

I have a VX1250. I don't know how to regulate the tension.


There is two places to adjust thread tension: the top tension device controls the top thread tension and is usually a dial or knob with numbers on the front of the machine.

Then there is some form of tension device on the bobbin; in your case I believe the Brother has a removable bobbin case with a tension spring which holds the bobbin thread firmly: the tension spring can be adjusted with a screwdriver but once set, you shouldn't need to adjust this much, just alter the top tension slightly for different weights of fabric. So start by setting top tension dial to 4-5 and test stitch a seam. Use different coloured but the same type of thread top and bottom and take a look at the seam. You want to see a balanced even seam.

Here is a link to a great info site for this:
http://www.sewusa.com/Sewing_Machine_Repair/Thread_Tension_Settings.htm

If the bobbin thread is too loose, then you probably will need to finess the tension spring on the bobbin case and adjust this slightly. The best way to set the tension on the bobbin case is as follows. Load the bobbin into the bobbin case and pull the thread tail into the tension spring, then suspend the bobbin by holding the thread tail up in the air (the dangle test). You want it to be just tight enough to hold its own weight, but still able to release thread when you pull gently downwards on the bobbin case. If it isn't doing this then take your little screw driver and adjust the screw on the leaf tension spring by ONE QUARTER TURN ONLY. Lefty looser, Righter Tighter. Then test again, and adjust again until its right.

Now test stitch again and finess your top tension to get the seam even. Remember to change the needle for each new sewing project too; this will impact tension also.

Jan 04, 2012 | Brother Sewing Machines

1 Answer

When I sew a seam, the bobbin stitch will just pull right out. Anything that I can try?


It has not been under tension when the seam was sewn, check your bobbin threading sequence and refer to your manual. The thread needs to click into a tension spring or similar device on all sewing machines.

For general machine tips, maintenance and help, try www.sewing.about.com - it has lots of information.

Mar 08, 2011 | Janome Harmony 2039 Mechanical Sewing...

1 Answer

I am trying to make a rag blanket and the tension on my machine loops on the underside. I am about ready to throw it in the ditch. How do you fix the tension on a 9410 singer machine?


How to fix the tension on 'any' sewing machine. I may know how (family in the sewing business for 50 years-all now retired).

To begin with:
1) Put in a new needle;
2) Re-thread the top thread;
3) Lower the foot;
4) If the needle threads from front to back (or r. side to l. side); begin pulling the thread through the needle in the direction it threads, while slightly tightening the top tension knob, wheel, or other tightener. The tension on the top thread should bend the needle quite a bit, without breaking it (for cotton material sewing). If you're sewing a lighter fabric, the top tension should be slightly looser;
5) Once you have the top tension adjusted, re-thread the bobbin case, with the thread coming to you, out of the bobbin, having the thread escapement on the 'top,' while the bobbin case is in your right hand, and the bobbin is visible on the left side. Your instruction book may say the opposite way, but this is really the correct way to do it, as the new threads have many knots in them, and the bobbin case will stay correctly threaded doing it this way; next,
6) loosen the little screw on the flat spring, that presses against the thread on the thread escapement of the bobbin (if it is currently tight);
7) If the thread is easily pulled through the thread escapement, slightly tighten the tread, so a firm pull is needed to bring the thread out of the bobbin case. Not to tight though (or you will get loops on the bottom of your seam. You may have to tighten a little, or loosen a little. The 'knot' of each stitch should be in the middle of the cloth. If the bottom tension is too tight, the knot will be on the bottom; if it's too loose, it will be on the top. When it's just right, it will be in the middle;
8) When you change weights and types of fabrics, you may have to re-adjust your tensions; but, the process is the same.

Just remember: Always begin with a new needle, and always 're-thread' your machine.

I hope this helps.

P.S. My father set up many of the Viking dealers on the East side of the Mississippi. I worked in the business all the time I was going to school, and a couple of years after the service (early 60's). I used to 'dream' about sewing machines, and finally got out of the business, but I still fix machines for my family.

Good Sewing, and
God's Blessings,

J. W. Stevens

Nov 03, 2010 | Singer 7442 Mechanical Sewing Machine

1 Answer

Tension problems


start with the bottom- should allow thread to pass freely with slight tension when dangled from the thread. Tiny screw on the bobbin case turned clockwise tightens tension. Next, check upper tension. Thread should pull through with foot down, with good tension. Stitch should 'lock inside the fabric(use two pieces of fabric and make a seam, thread from both top and bottom should be visible when you open the seam.

May 29, 2010 | Euro-Pro Fast and Easy 420 Mechanical...

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

1 Answer

Thread tension for regular seam sewing


oil the shaft for the presser bar and keep moving it up and down(it may take a while) until it moves freely. Always use Sewing machine oil Not 3N1 oil.
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). If you have loose thread on top your top tension is probably too tight and your bobbin thread too loose

Mar 23, 2009 | Sewing Machines

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