Question about Bernina Activa 130

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Thread breaking problem

I have a Bernina 1001 and I just recently serviced it. I am using the clear nylon thread for all my projects and sometimes my machine will break the thread and sometimes it will work fine for a while. When it breaks it, it seems to be pulling at the bottom somewhere because it breaks right at the needle. If I go really slow it wont break as much but you can hear the tension noise in the thread as it pulls the thread up through the seems to be getting worse and the tension dial seems to do nothing.

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  • joey20046 Jun 28, 2009

    Ok, so I watched underneath in the bobbin area as it was sewing and I slowed it down and turned it manually and saw that the thread gets caught on one of the grooves in that black thingy that revolves around the bobbin and it pulls it and that's what is creating the thread tension noise (like someone pulled a piece of thread as tight as they can and strummed it like a guitar, type noise...) Is there supposed to be a groove near the end of the black thing im talking about or is it supposed to be smooth? I was wondering if that part is called the hook that another post was talking about...



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The problem is that the nylon thread will actually cut into the race cover and create groove, it should be smooth. The only way to correct this is to replace this cover. I can not stress enough do NOT use nylon thread on your sewing machines, it will do permanent damage and cost you 100s of dollars in repairs.
I have 25 years experience working on these machines and have seen this happen time after time.

Posted on Jun 30, 2009


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Intermittent sewing problems

You have two problems:
1) Sometime it sews fine, but other times it will sew like there is no tension on the thread and create a "birdsnest" in the bobbin compartment.
Cause : Threading the upper thread
- clean upper thread tensions discs
- do not forget "• raise the needle and presser foot" (see manual page 18)

2) Sometimes it just randomly changes ...
Please open new ticket. Give tu us more info. It seems like Short circuit on S-print, but your description is chaotic (not usable)

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

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2. Lint has collected in the bobbin holder
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here's a free manual

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