Question about Bernina Bernette 75

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Loose stitch I have a Bernette 720. The machine sews along just fine, then every once in awhile I have one loose stitch. When continuing along it stitches fine. I have no idea what this is.

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Welcome to FixYa. I am the sewing machine expert that chose your issue to solve.

When everything seems to be working fine and an occasional stitch is loose.....now get ready.......here it is.......the needle!

It seems impossible, but the needle is the most neglected part of the machine. The one you are using could be slightly bent or have a slight burr that you won't see with the naked eye. Also, needles, especially in an embroidery machine (which work their buns off), are only good for about 8 hours of cumulative use. I would say that an embroidery needle should be retired after 3 or 4. They get dull like a razor blade which can cause enough drag to create a timing issue that's barely perceptible.
Welcome to FixYa! I am the sewing machine expert that chose to help you with your issue.

There are really only two things that can cause bottom (note: remember that problems with the bottom thread, almost always comes from the top and not the bobbin. Bobbins rarely need tension adjustments). These two things are:

  1. An area was missed when the machine was threaded (most machines have an arrow at each area on the thread path where the thread MUST run or the stitch on the bottom will be sloppy. Threading can be tricky and even the most experienced miss once in a while.
  2. The tension adjustment mechanism in the thread path. If the thread is not properly through this area, the thread on the bottom will be sloppy or if, threaded properly, and the tension is set too loose, the stitch will be sloppy. If the tension is set too tight, the bottom thread will be tight and pucker the fabric.
It is counter-intuitive that problems with the top tension cause problems with the bottom stitch but it sure will.

So try it and see if that helps.

Thanks for using FixYa.com

P.S. - If you find that the solution/answer I provided led you to, or resulted in a fix, please close the ticket with a FixYa! rating. I would be very grateful for your show of appreciation.
If it hasn’t, please do not assign a rating just yet. Please post back as to what steps you took, results, etc, and I will try to assist you further.



Posted on Jan 31, 2009

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Posted on Jan 02, 2017

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