Question about Bernina Sewing Machines

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Bernina 335 serger won't sew/overlock. carefully rethreaded the serger but that hasn't helped.

Changed the needle in a well-maintained 335 Bernina serger and rethreaded it.

Posted by Marlys Wolfgram on

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Neal Iund

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The 335 has a two thread chain stitch (stitch type 401), and the overlock side (right needle side), is a three thread plain overlock. If you are describing the plain overlock as the problem, I would first suggest the following in re-threading:

1. Thread the upper looper
2. Thread the lower looper
3. Thread the needle last (important)

If the needle threaded, you cannot re-thread the lower looper without breaking the thread.
In order to thread the lower looper, the lower looper must pass by the needle thus picking up the needle thread. So, instead of threading the lower looper thread underneath the needle thread, the looper would be threaded on top and cannot sew without breaking the thread.
Make sure that the threads are bedded between the tension disks. Check this by stretching the thread fore and aft of the tension disks as well as visually noting that the threads are not accidentally threaded behind the disks. You can also loosen the tension disks when threading so as to allow the threads to bed deeply between the disks.
Please reply with your observations.

Posted on Nov 03, 2015

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5 Related Answers

Anonymous

  • 106 Answers

SOURCE: bernina 1300 dc overlocker skipping stitches

Make sure the chain stitch thread is threaded exactly as it should be, make doubly sure the thread comes off the bobbin vertically and runs through all eyes smoothly. Any faults in the threading causes extra tension at the needle despite what the tension is set on.
If this is not the cause then the needle depth and the looper timing needs checking.
Rob

Posted on Mar 30, 2008

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Anonymous

  • 43 Answers

SOURCE: I have a baby lock ea-605 serger

Assuming that (a) you have tried installing new needles, (b) the new needles are the correct system for the serger and the right size (typically size 14 for medium-weight fabrics, size 11 for lighter-weight fabrics), (c) the needles are installed correctly (inserted all the way up into the needle bar and facing the proper direction), then your machine is likely out of time and / or has a defective part such as an upper / lower looper. That will require professional attention to correct.

Posted on May 07, 2009

Anonymous

  • 1116 Answers

SOURCE: Serger stitch not forming right

It sounds like the timing needs to be reset by a sewing machine repair tech.

Posted on May 09, 2010

Anonymous

  • 16 Answers

SOURCE: I just changed my Kenmore serger's needle and it

Hi

If you have the operators manual for this serger, you should be able to follow the threading from the start successfully. Some machines have a better threading diagram on the machine itself.

The needles should have the groove facing the operator's position. They should also be fully inserted in their mounts. Most sergers do not release the thread tensions when the presser foot is raised, therefore, you must zero the tensions to make sure the threads are fully entered into the tensioners when threading anew. After threading, you must readjust your thread tensions to the desired tensions for the set-up you plan to use. Thread tensions should be recorded for each stitch set-up because each serger tends to be a bit different, and therefore, allows you to quickly adjust for the desired stitch needed. The different stitches are adjust and fine tuned by each individual thread tension.

Hope this helps
Ray

Posted on Mar 05, 2011

Anonymous

  • 539 Answers

SOURCE: Serger is threaded correctly, added new needle, threads do not form on stitch finger to connect to fabric when sewing. What's up?

Is presser foot in DOWN position? Jimmy

Posted on Apr 02, 2012

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