Question about Bernina Sewing Machines

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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 thread tension to the 'red line'/standard and still no luck. Help??

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  • Expert
  • 460 Answers

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.

Posted on Oct 16, 2013

  • ArmandsFav
    ArmandsFav Oct 17, 2013

    After attempting this, I have still got problems. I am taking it for servicing asap. Thank you for the help!

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  • Bernina Master
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I've been told many times (and it still doesn't always sink in), the first thing to do is change the needle. And make sure to use the correct size and type of needle for the thread being used.

Be sure the presser foot is raised BEFORE you thread the machine.

Perhaps the tension mechanism is dirty, loose or broken. Try pulling unwaxed dental floss through the tensioner (always pull forward, NEVER backward).

The bobbin thread holder should always unwind in the clockwise direction inside the bobbin case.

If none of these solutions work, then it may need a trip to see a Bernina technician

Posted on Feb 09, 2015

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Posted on Jan 02, 2017

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SOURCE: janome straight stitch loose

I don't know if this is the right answer for any of you, but thought I'd put my 2 cents worth in. Often this can be the bobbin in backwards. It needs to unwind a certain way depending on the machine. I've heard a phrase for this: Mind your p's and q's which means some wind off to the right like a q, others to the left like a p. Mine has to unwind one way then be slipped backwards into a little slot or it does that loose bottom thread looping and bunching someone here mentioned. It seems everytime I get that problem I rethread the top thread 100 times before it clicks again and I remember it could be the bobbin thread. Either your manual will tell you the correct way, or you could experiment and try one or the other. Once you figure out whether you're a p or a q, mark it on your machien somewhere to remind yourself.

Good Luck and Happy Sewing!

Posted on Apr 04, 2009

  • 1 Answer

SOURCE: I have a Bernina Virtuosa 155 and use it daily. Without

In checking I can either adjust the tenion screw and if that does not work, purchase a new bobbin case.

Posted on Oct 28, 2009

  • 1116 Answers

SOURCE: The upper thread tension on my Bernina 930 is too loose

If you threaded the machine with the presser foot lever raised and the stitching is still loose, the tension control may need a new spring or the entire control may need to be replaced.

Berninas tend to be the only brand that hold their value and it would be worth the expense to take it to an authorized Bernina dealer for service and repair.

Posted on Mar 25, 2010

  • 20 Answers

SOURCE: bottom thread too loose; tried

Check for correct bottom thread tension.
It's provided by a flat spring on the bobbin holder.
When the bobbin is correctly installed, pulling on the thread
should meet with slight resistance, and the bobbin should spin without
trying to jump out of the bobbin holder.

Posted on Dec 18, 2010

Tally Girl
  • 1129 Answers

SOURCE: Thread tension problem when sewing on heavy fabrics

If you are using buttonhole twist or heavy topstitch and normal thread underneath machine tensions wont like it. Try using regular thread top and bottom but use two same colour on top and thread both through needle but put one either side of tension discs if you can. Top stitching jeans is problematic for manymachines even Berninas

Posted on Jan 13, 2012

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1 Answer

My Bernina Artista 185 has been looping the top thread on the underneath side. Is this a tension problem? No amount of adjustment seems to correct it. What can I do to correct the looping problem?


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It is a tension problem. My advice is always to double check in the manual that you are threading correctly. With loops underneath, your tension is too loose, or the bobbin is not seated properly.

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Once upon a time, a blanket stitch used to be a long wide zigzag stitch. If you are referring to an electronic stitch version that would look like the inverse of a blind-hem stitch, then no, this is not possible on the 930 record machine.
What is nowadays called a blanket stitch used for quilting applications requires the machine to stop feeding during the stitching cycle to allow for the single stitch to the left and then back again. An electronic step motor machine, common to all newer Bernina machines can do this and or similar functions. That being said, don't be thinking about getting rid of your 930. Better to get one of the newer units for occasional blanket stitching and keep the Swiss made 930. The Bernina 930 is a lifetime machine. Computers machines are not lifetime class machines by virtue of being computers. Electronics are short lived.
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1 Answer

Why stitches on top are great but bottom are loose and loopy?


Check your upper threading. Make sure it's between your tension discs. Remember loops on bottom, something is wrong with upper threading/tension. Loops on top something is wrong in the bobbin area (like the bobbin being in upside down or a loose bobbin tension spring)

start by rethreading the top thread with the presser foot UP.

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1 Answer

Bottom stitch is gathering, but I think the machine is not threaded correctly


Hi there,
I would start by re winding your bobbin and making sure that it is done though all the correct tension loops. A bobbin that is wound to tight or loose can cause all sorts of problems. If that has been done then completely rethread the machine from scratch. Now go through and check all your tensions, it sounds like the bobbin tension is too loose and your stitch tension is too tight. Adjust and try again.
Good luck

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1 Answer

Every few stitches thread gathers and jams on bobbin side of fabric. Why? [the machine is a Singer model 6180]


Change needle
Clean under needle plate where feed dogs are for lint
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& bobbin
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1 Answer

Juki HZL-E61: cannot get tension right on straight stitch


Loops on the bottom of the fabric direct the problem to the top thread. Rethread again and make sure the thread goes through the tension discs. Lift the foot, because this is what opens the discs. When sewing and the foot is down, the discs should be closed and thus giving the upper thread the tension it needs.

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I found a screw on the bobbin case (where you put the cotton for the underside stitching) which was very loose. I tightened it and that created more tension for the bottom thread which solved the problem.

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2 Answers

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Bottom looping says upper tension problems (too loose). Rethread it making sure the presser foot is up so the thread is inbetween the tension discs.

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