Question about Juki HZL-E61 Computerized Sewing Machine

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My top thread is breaking on my Juki industrial straight stitch machine. I have changed the needle, changed the thread, polished the hole in the feed dog, checked for burrs on the bobbin assembly hook. It seems to be breaking down below the feed dog. Could it be the timing?

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Not necessarily, a thin needle will break on heavy weight materials, the needle clamp screw could be loose, it could be an issue with the pressure foot (wrong type or mis-installed), or you could be pulling the fabric too quickly. Before you assume the timing is bad...

  • Use correct size needle.
  • Properly insert needle.
  • Securely tighten needle clamp screw.
  • Use correct presser foot.
  • Reset presser foot.
  • Do not pull fabric, guide it gently.


Posted on May 07, 2010

  • NA NA
    NA NA May 07, 2010

    If you feel like your doing everything right and the only explanation is that the timing is off then try this.



    1. Turn power off and wait about 20 minutes giving motors time to cool

    2. Clean bobbin case, shuttle and thread dogs while you wait. Check threading order and fully pull thread into thread sensor guide.

    3. Reset your thread tension.

    4. When starting again, change your sewing speed...not too fast or too slow. One overheats the motor and the other can cause missed stitches. Both of which effect timing.





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Juki Lu-562 breaking, fraying thread. The tread will fray and eventually break a lot. Is there anything else besides a different size needle or burrs on the foot plate for foot feed?


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