Bernette sewing machine making a mess of thread on back of fabric

I have a Bernette 66 sewing machine that I'm still becoming familiar with. Whenever I start sewing, the bobbin seems to catch and sputter a bit, leaving a mess of thread on the back of the fabric. I'm certain I have the bobbin threaded properly-- I'm following the manual and there is tension in the bobbin. If I start sewing slowly, even just turning the handwheel, I don't have this problem. Any ideas would be much appreciated!

emmakiele Jan 02, 2009

I'm having this exact same problem with my bernette 66.
Anonymous Apr 20, 2013

I am having a problem with my 66 in that I cannot seem to get the tension correct on a straight stitch. Doesnt matter what I set the tension, stitch width and length It either shows the bottom stitch on the top and the bottom stitch loops under the fabric . What settings do you ladies use for straight stitch?

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Anonymous

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Posted on Dec 14, 2008

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I once heard from a great sewing instructor that if the problem is on the back of the fabric then it is a spool to needle problem.... if the problem is on the top of the fabric, then it is a bobbin problem. Check your machine for dust and stray threads. Check your bobbin casing for dust and stray threads.

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Bernina Bernette 66:Needle got stuck and does not move up nor down when using the wheel.

Force the handwheel in the direction of travel. You can't break it. Then remove the needle and bobbin and run the machine 15 seconds at full speed.

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Basic Tips for All

Always turn the handwheel TOWARDS you (counter clockwise) as turning it in the opposite direction (away from you, clockwise) may knock the timing out requiring repair from a service center.
Always be sure your presser foot is in the DOWN position before sewing. Sewing with the presser foot in the up position will cause your thread to tangle and your bobbin to jam.
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May 21, 2015 • Sewing Machines

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My Bernina Bernette 65 has a problem with the thread bunching up every 10-15 stiches on the bottom. Some of the thread stitches on the bottom of the fabric are in a straight line, and then the thread will...

try a new needle--one that is for the fabric being sewed
then try to adjust the top thread tension again, if the stitches remain loose and the tension won't adjust then the tension knob needs to be checked to see if there is something wrong with it.
also check to make sure the bobbin is inserted correctly into the bobbin case, if the bobbin is not turned the right way in the bobbin case the sewing machine will not stitch correctly.

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Aug 05, 2013 • Bernina BERNETTE 65 Mechanical Sewing...

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When i am sewing the stiches on top, but its at the bottom

change the needle --make sure it's the right one for the fabric
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rethread the machine top and bobbin

make sure the bobbin is turned the right way in the bobbin case

also check the top thread tension, if the stitches under the fabric
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at a time and sew on a scrap piece of fabric till the stitches look
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here is a free manual
http://www.singerco.com/uploads/download/696_5417c.pdf

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Did you change the needle to one designed for elastic thread?

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My bernette 65 is bunching underneath. How do I resolve that?

Grasp the threads and hold them down when you start your seam. If it still happens make sure your thread is seated into your upper tension mechanisms. If that still isn't solving your problem... CLEAN between the tension discs with some sturdy fabric folded in half. (wax build up from threads can cause issues)

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Aug 04, 2012 • Bernina BERNETTE 65 Mechanical Sewing...

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I needle comes unthreaded whenever we try to sew. We've both tried numerous times and it doesn't make a sitch. The bobbin seems to be done correctly b/c the bottom thread comes up with no problem....

first let's deal with the needle becoming unthreaded, Keeping the needle threaded is easy, always keep thread tails of 3 to 6 inches on the top thread & bobbin at all times, & make sure the thread tail are pulled behind the needle before you start to sew,, this will ensure that the thread will not come out of the needle when you start to sew.

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thin fabric needs a different needle than blue jeans fabric, check your top tension & see what the setting is on, usually 3 to 5 is good.

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The machine is threaded correctly but it is not stitching on the fabric,it was stitching but leaving spaces with no stitching ,so after re threading the machine and fiddling with the tension it now does...

First I would replace the needle. Next, completely rethread the machine, making sure the thread is passing through the take-up lever. Next, remove the bobbin and reinsert it. This is a good time to also give the machine a quick cleaning, in case lint or thread is building up anywhere. Then try sewing again on scrap fabric and adjust your tension.
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