Question about Bernina BERNETTE 65 Mechanical Sewing Machine

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I have a bernina 440 and have loops appearing on bobbin thread how do I fix please

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6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Thread tension problem when sewing on heavy fabrics

Sometimes when I need to use heavy thread for top stitching to reinforce a seam that has come undone, I will use the heavy thread on the top and regular thread on the bottom. I haven't tried it the other way around for hemming but I would think it would work. I do not currently have a Bernina.

Posted on Feb 08, 2008

RickE1
  • 202 Answers

SOURCE: Bernina 180 - winding thread onto bobbin spool

Also it is quite possible that the small circuit board (P-print) just below the bobbinwinder that the motor plugs into has gone bad.

Posted on Nov 27, 2008

  • 8 Answers

SOURCE: bobbin tension

Bobbin Tension Adjustment:

1. Do you have a genuine Bernina bobbin casing and not an Oriental copy? If yes, proceed as follows:
2. To set the bobbin tension, wind a genuine Bernina bobbin with Metrosene thread, type 1161 white thread as your "gaging thread". Load the bobbin case so that the bobbin turns CW. Attach the bobbin case to the hook body from the machine. Wind a couple of revolutions of thread around your index finger with the assembled bobbin case and hook body dangling about 6" to 12" below your finger. Gently and rapidly move your finger back and forth in a "sideways" motion about 1/4" to create a gentle vibration on the bobbin assembly. (Do not shake the bobbin assembly up and down). When the tension is right, the bobbin assembly should fall slowly and as you stop the movement, the assembly should stop.
The adjustment is found on the small screw, holding the flat tension spring against the bobbin case. If the tension is too tight, one must loosen the screw (past) the desired location and always make the adjustment by tightening to the correct position.

There are other checks for tension imbalance and associated problems on the bobbin case that I won't go into here. For further information I can help you later on.

Top Tension Adjustment:

1. The top tension rarely changes and can be depended on throughout the life of that machine providing that tension assembly is maintained occasionally. This can be done by blowing out the tension disks with the presser bar lever in the up position. One can also drag or pull a piece of sized percale or muslin through the disks with the presser bar lever in a down position. Perhaps both methods can be employed.
2. Load the top of the machine with Metrosene 1161 thread in a dissimilar color. I prefer to use a pastel color so as not to create an optical illusion of imbalanced tension.
3. Sew a satin stitch (.25 on the Nova 900) in sized cotton muslin with a thin piece of paper between two plys of fabric. The width should not exceed 4.5mm (standard width on the 900 Nova), however the newer machines have wider stitch widths so one must adjust as specified. The result will be a slight amount of top thread in symmetric lines on both the right and left sides of the satin stitch.

Typically, the top tension will not need adjusting. If the Nova 900 needs adjustment, please ask for additional help.

Posted on Nov 28, 2008

  • 69 Answers

SOURCE: Singer Touch & Sew won't loop bobbin thread

I believe you have a broken gear. These are difficult to repair on your own.

Posted on Feb 12, 2009

  • 1 Answer

SOURCE: Bernina Bernette 65 sewing machine

I had the same problem. I'm a novice sewer. I just bought my machine. It did the samething, tension didn't work, the thread kept knotting up underneath, and the fabric kept curling up in the back.

I adjusted the tension knobs to no avail. Then it kept bothering me that it was curling up. I then decided to set the dials back to where the factory had them and adjusted the presser foot just a hair counterclockwise and I haven't had anymore problems.

The other day the needle almost broke because the tension was tight on the thread. You have to make sure that the needle is at it's highest point to get it to release the fabric so you have a thread tail.

This is my first purchased machine. I had a New Home years ago that was given to me, however it blew away in the tornado of 1991 in Kansas and I never replaced it. I really do love this machine. I don't believe I will ever want another.

Posted on Nov 11, 2009

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1 Answer

Where is the bobbin switch for bernina 440


What do you mean by "bobbin switch?" I have a 440 but cannot think of what you could possibly be asking.

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Hello Shirley, I suggest you make sure the machine is threaded correctly. If you have a factory manual, that would be a help. It sounds as though the needle thread is not threaded through the take up arm and/or take up arm spring. The needle thread tensioner might be too loose.

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The upper thread is constantly breaking. Don't know how to fix it. Any suggestions?


Check the tension for upper thread and bobbin(tiny screw to turn anticlockwise to give less tension)

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"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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I have a Bernina record 930 with loose/looping stitches which occasionally gather at the bottom/bobbin side. I have threaded, rethreaded, changed threads, changed bobbins and bobbin cases, have set the...


A blunt needle can also cause this. Try pulling a button thread or any slightly thicker thread through all the tension springs, perhaps you have a blockage somewhere.

Oct 15, 2013 | Bernina Sewing Machines

1 Answer

I have a Bernina 130, the thread from the bobbin is coming out with huge loops, the top thread looks great, but turn over the fabric and you have a mess. Any advice is welcome.


Usually if your bobbin thread is loopy it's because the TOP thread is not threaded right. Try threading it again with the presser foot UP and make sure to get the thread between the upper tension discs. It's just the opposite of what you would think.....if the bobbin thread is loopy, the top thread is threaded wrong, if the top thread is loopy, the bobbin is threaded wrong. Good luck!

Aug 20, 2010 | Bernina Activa 130

1 Answer

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Double check that your needle is the proper one for your machine, and that it is in properly. It sounds like it is not picking up the thread properly. Tension problems usually have more to do with threading, thread or needle problems than with bobbin problems. Also check your bobbin is unwinding in the proper direction for your machine. Most machines unwind the bobbin thread, turning clockwise. Set your screw back to the factory settings, and give the machine a good cleaning as well. Lint can cause this to happen as well, if it builds up enough to interfere with the needle and the hook action. Double check that your upper thread is threaded properly as well. I suspect your needle is in backwards however.

Jan 08, 2009 | Bernina 1008

2 Answers

Thread tension problem when sewing on heavy fabrics


Sometimes when I need to use heavy thread for top stitching to reinforce a seam that has come undone, I will use the heavy thread on the top and regular thread on the bottom. I haven't tried it the other way around for hemming but I would think it would work. I do not currently have a Bernina.

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I'm not an expert, but maybe your bobbin is wound incorrectly, or not put in the bobbin case properly?  Hope it is something as simple as this.  Good luck!

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