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Czajka Russian Sewing Machine: Thread Breaking Fix - Zigzag, Tensioner Issues, Solutions

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Why does the upper thread break on a Czajka sewing machine when sewing zigzag, and how can I fix it?

The thread usually breaks because the thread is too weak, the upper tension is too tight, there are burrs on the upper thread guide or shuttle hook, or the hook timing/stroke is wrong [#5700999] [#5702482] Check that the thread is threaded correctly, including the correct side of the needle, and that the needle is inserted with its flat side facing the flat in the holder [#5701988] Adjust the tension only with the presser foot lowered, because with the foot raised the tension discs are open and the thread runs loosely [#5703045] If the machine was unused for a long time, lubricate it first, then oil it properly with sewing-machine oil [#5701568] Inspect the hook/shuttle and upper thread path for sharp edges or burrs and polish them with a fine whetstone; also make sure the lower thread runs freely and, if needed, readjust the shuttle stroke [#5709008]
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  • #1 5700747
    Anonymous
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    #2 5700999
    axxx
    Home appliances specialist
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    There are many reasons for picking up, for example
    - too weak threads
    - the tensioner is too tight
    - burrs on the upper thread guide
    - wrong settings catcher hook
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  • #3 5701250
    Anonymous
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    #4 5701568
    axxx
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    For a long time it has been unused for a long time. It's good to grease WD, then
    recharge well with oil for machines.
    The picking takes place certainly around the looper or stitch plate
    lengthen the fabric and by hand turning it to the stitch plate as you thread it, or do not hook it with a sharp element.
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  • #5 5701916
    Anonymous
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    #6 5701988
    Kristo
    Level 17  
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    Check that the thread is correctly inserted into the needle. In some post-Soviet machines, the thread was assumed from the opposite side. The needle should also be inserted properly, ie a flat cut to a flat edge in the holder. The effect of improper thread guiding will be just picking it off after a few correctly connected stitches.
  • #7 5702252
    Anonymous
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    #8 5702482
    axxx
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    The fact that the catcher collects the thread from the needle well does not mean that its stroke is correct, it may be lowered or accelerated and in such a situation immediately cut the thread like a scythe, but do not take to set the catcher check the threading and correct insertion of the needle.
  • #9 5702531
    Anonymous
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    #10 5703045
    axxx
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    After lifting the presser foot, the plates are usually removed and the thread goes loosely. The adjustment is made with the presser foot lowered.
  • #11 5703541
    Anonymous
    Anonymous  
  • #12 5709008
    axxx
    Home appliances specialist
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    It is known that in Ruthenian everything is different. Compare the drum itself in all machines the mustache of the drum is to the left and in this it can be in the right one, and in this case the catcher other you will not squeeze.
    Look carefully at this grip polish with a fine whetstone. All burrs are the majority of defects on breaking the machine. The bottom thread also has to go freely above the tile and not lighter than the upper thread.
    If these tips do not work, however, it remains good to set the catcher's stroke.
  • #13 5709079
    Anonymous
    Anonymous  

Topic summary

✨ The discussion revolves around issues with the Czajka sewing machine, specifically thread breaking during zigzag and straight stitching. Common causes identified include improper thread tension, weak threads, burrs on the upper thread guide, and incorrect needle insertion. Users suggest lubricating the machine with WD-40 and oil, checking the threading and needle position, and ensuring the tensioner is correctly set. The compatibility of parts from the Łucznik 451 model is also explored, with one user successfully adjusting the tensioner and replacing the drum from the Łucznik 451, resulting in improved performance.
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