Question about Bernina Activa 140

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My bernina activa 240 is knotting below the fabric and I don't really know what to do to fix it.

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What you're getting is called a "bird's nest" and it has happened to everyone who sews (and will, at some point, happen again I'm afraid!). Take courage, it can be solved.

First, are you sewing a really thick fabric or a bunch of layers? If so, this can cause a problem. You may have to go very slowly with the machine and pull the fabric out, put it back in and start sewing where you left off each time you hear the machine start straining. If you're not stitching thick fabric or a lot of layers, try changing the needle. If the needle is even slightly bent, so slight you may not even be able to see it, it can cause problems with the bobbin thread and cause a bird's nest.

Not solving the problem? Let's rethread both the top of the machine AND the bobbin completely. Check and make sure that the thread on your bobbin is wound nice and tight around the bobbin, just as it would look around a spool of thread you just bought at the store. If not, you need to rewind your bobbin. You can always rewind a new bobbin from the old one so that you don't waste the thread.

Still not solving the problem? Take all the fabric out of the machine and look down in the bobbin area while you're turning the machine's wheel by hand. Is the thread looping and catching on something in the bobbin area? CAREFULLY inspect in there (there is delicate plastic that can break if you're too aggressive, so be gentle.) Did something fall in there? Take the top plate off if you need to. Does it look like there's a piece of plastic that's been "bitten" out of the bobbin casing if you have that type of bobbin case? Or is the thread catching on a part of the bobbin casing, no matter what type you have? Then you may need to replace it. They aren't terribly expensive (less than $30), easy to replace yourself, and are usually easy to find online. Do a search on Google using your machine's name and model number (Singer Futura CE-100 and "parts"). A lot of times you can find the casings on eBay, too.

If you need further help, leave me a comment. I check back daily, so I should get back to you within 24 hours. We'll get the problem solved for you and save your sewing sanity.

Posted on May 18, 2011

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Here's the manual:

https://www.bernina.com/en-US/Support-US/Machines/BERNINA-activa/BERNINA-activa-230


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Owners manual


Unfortunately this is a purchase site. The closest I could get would be for an Activa 220 230 240 . You can download the manual.
Check the picture on no. 7 and see if this isn't your machine.

http://www.sewingmanuals.com/Sewing_Machine_Manuals/Bernina.htm
Hope this helps. Luck!

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