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Bernina 820 bobbin case malfunction and thread caught on hook how can I fix this please?

My bernina 820 was working well for free motion embroidery but it then went wonky,broke a needle and now bobbin case doesn't come out properly unless I turn wheel and uppper thread gets caught on hook as the hook seems to be about 2mm in the wrong place, what can I do ?

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  • 353 Answers

YOU MUST HAVE TURNED THE TENSIONER DIAL, THIS IS THE KNOB THAT determines how tight the stiches are, what ever you did, try to turn the dial back a tiny but at a time after of course you put new needle in there and turn the wheel by hand only dont use speed pedal try that

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Posted on Jul 02, 2018

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Posted on Jan 02, 2017

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SOURCE: Bernina Bernette 600 Deco embroidery machine

It could be that there is a loose piece of thread, or some fluff which is obstructing the tension gauge. Try blowing around the theading area (or even run the hoover pipe near it to see if you can **** it out). I cleared mine by folding a piece of non fluffy material and rubbing gently between the tension dial and machine.

Good luck

Posted on May 22, 2008

senaweemes
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SOURCE: using a bernina gold latch bobbin case on the Bernina 435 machine

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2 Answers

Bernina 820. The part of the machine which holds the bobbin, spins and goes in where it should be but then comes back out


the bobbin casing is not clipped in place properly, lift the lever and push in place then lower the release lever.
or try another bobbin casing, these are only 30p on Aliexpress with free shipping.

Nov 23, 2017 | Bernina Sewing Machines

1 Answer

Bernina Deco 330 embroidery machine bobbin case tension.


There are tests to perform for testing and adjusting bobbin tension. There really aren't any "specifications" other than adjusting it until the bobbin drop test is where it is normally recommended.

adjust bobbin tension Google Search


P.S.--be sure to ALWAYS raise the presser foot when threading the upper thread to insure the thread seats completely in the tension disk.
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Aug 22, 2016 | Bernina Sewing Machines

1 Answer

The bobbin assembly has a lot of tangled up thread and is jammed. How do I clear it?


Avoid attempting to run the motor if the machine is bound--it may damage the motor.

Remove the presser foot and, if you can, remove the needle. Then remove the needle plate, the bobbincase, and the hook. If you are unable to remove some of them, you may need to use a small pair of scissors to snip the threads and gently pull them out with needlenose pliers or tweezers.

Once you have the thread tangle removed, clean with a soft brush to remove all the lint and thread bits and place a drop of good quality sewing machine oil (preferably Bernina oil for your machine) on the bobbin race. Install a brand new needle (in case the old one was damaged).. RAISE the presser foot, remove all the thread, and rethread from the very beginning. (The raised presser foot releases the tension disks so the thread will seat properly.) Use good quality thread--avoid old or bargain bin thread (some Berninas object strenuously to Coats & Clark thread too). Some threads create heavy lint buildup in the tension disks and bobbin area in addition to hanging up in the needle and elsewhere. Also, some fabrics shed more (ie fleece), so be sure to clean often. Try to oil your machine as instructed in the owner's manual--every time you change a bobbin, after 8 hours of constant sewing, or every 6 months if not in regular use.

When Thread is Caught in Sewing Machine Sewing Lessons

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Anyone have experience with jammed bernina sewing machine Discussions...

Having trouble with my new Bernina 820

This video may help avoid thread nesting:

How and Why to Bring up the Bobbin Thread

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Oct 21, 2015 | Bernina Sewing Machines

2 Answers

Bernina 1008 thread bunching on bottom


"Nesting or Rat's Nesting" on the bottom side of Bernina sewing machines (CB hook type) is generally the result of very loose top tension. If the problem is found in newer sewing machines such as machines made after 1986 (serial numbers beginning with 26xx xxxx), may have an older Bernina bobbin case in the machine. The problem with the older bobbin cases is that the rounded projection of the latch on the left side of the casing will catch thread, preventing easy thread escapement during the take-up lever cycling resulting in loops on the bottom side and or thread breakage, etc..
Note:....Timings and modified latch geometry's were applied to later models to allow for good thread escapement. Older Bernina cases cannot be used on newer machines but newer cases can be used on all CB hook Bernina machines.
Additionally, Chinese copies of the Bernina/Cerliani OEM bobbin are rampant and can cause sewing issues. Always ask for OEM Bernina cases.

Note the following trouble shooting logic:
1. The center tension disk that is visible through the thread slot in the top cover of most machines must be positioned exactly in the middle of the top cover slot. By loosening the fixing screws on the top tension mechanism, one can adjust the disk position to center.
2. It would be a very rare situation for the top tension to change whatsoever from the (red center marking) factory setting. The most likely cause of loose top tension under the normal center mark position, would be accumulated lint, thread, or a sticky substance between the disks. This would prevent the tension compression disks from applying an even tension on the sewing yarn (thread). Often this can be blown out with compressed air when the presser foot lever is lifted in the up position. In some cases, soft drinks and other sticky or corrosive liquids can find their way between the disks. In this case, the tension assembly must be removed, disassembled, and the disks cleaned and polished.
3. Check the facial surfaces of the bobbin case for corrosion, and sticky substances that prevents the thread from easily sliding over the bobbin case.
4. Check that the spindle of the hook body is not bent or warped, causing the bobbin case to wobble, thus creating an intermittent pressure on the hook race cover at the moment that the thread is trying to escape over the bobbin case finger. (Replace the hook body)
5. Inspect the undercut on the hook body spindle for thread wrappings and knots. This condition can cause the bobbin case to press hard against the hook race cover, hence hindered thread escapement .
6. Exceedingly tight bottom tension can cause some problems as well. ( If you don't know how to adjust Bernina bobbin cases to factory settings, please ask).
7. Hook timing, (loop lift) can be out enough to affect thread escapement. This is typical of newer machines made after 1986 since Bernina no longer made fixed timed machines like the earlier Swiss made models. The later made models have timing components that can slip under stressed machine mechanics.
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Feb 13, 2014 | Bernina 1008

1 Answer

Thread bernina embroidery bobbin


The thread sensor eye is probably dirty.

Dec 26, 2017 | Bernina Sewing Machines

2 Answers

I have a faithful 730 Bernina and currently the bobbin thread keeps breaking. Please advise what may be causing this. Thanking you.


Bobbin thread breaks
1. There is a right way & wrong way to insert the bobbin in the case --when you insert the bobbin in if it doesn't stitch correctly turn the bobbin over see if that helps or bobbin case is not inserted correctly
2. Lint has collected in the bobbin holder
3. The bobbin is damaged & doesn't turn smoothly
4. Lower thread tension is two tight

here's a free manual
http://www.bernina.com/getdoc/48e8d09f-98f7-40ab-8663-a23663df4fae/Bernette_715_730_740E_manual

Sep 17, 2012 | Bernina Sewing Machines

2 Answers

Using a bernina gold latch bobbin case on the Bernina 435 machine


There isn't a Bernina 435. If you are referring to the 430 than the gold latch bobbin case will not work in that machine. If you are talking about the Bernina 450 the gold latch will work in that machine, with or without the embroidery module.

Apr 06, 2009 | Bernina Sewing Machines

2 Answers

Bernina 740 favorit timing


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Jan 12, 2009 | Bernina Activa 130

1 Answer

Bernina Aurora 430


I figured out the solution for this issue. It all has to do with the threading. And I mean literally follow the instructions word for word. Most importantly is the Bobbin thread. make sure to thread the bobbin through the case eyelet.

Jan 11, 2008 | Sewing Machines

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