I started to doubt myself and believe the anonymous answer claiming the impossibility of the lower thread to unthread itself without breaking. I just re-threaded my Bernina Fun Lock for at least the 10th time today and I can definitively report that it is unthreading itself and staying stuck in the cracks of the plastic cover to the machine.
It is impossible for a looper to come unthreaded if you are holding one end and the other is still feeding off the spool. Somewhere a thread broke - must be either the upper looper or the needle. Try completely re-threading your machine. Many machines have an "order" they prefer to be threaded. Try starting from the right tension guide and work to the left.
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marly here: I found that i was not threading the lower looper thread through the two threads that circle under the lower looper needle. i assumed that it would thread itself through the proper way once it was running but each time it would not work, so when i took the tweezers and loosened the other threads enough for me to see and thread through them, it worked first time. but i had threaded before at least a dozen times, but obviously not tight against the needle to pass between the other threads. (this is hard to explain , I hope this is clear enough for someone else with the same problem.}
i too have had this very frustrating de-threading occur... i need help as 5cm of overlocking and then no braiding leads to much hair pulling!!!
i will try marly's solution but not quite sure of the exact process
I too have the same frustrating problem with the no 1 lower looper breaking as soon as it has sewn a very short distance. It can take hours of rethreading to get it to work. It is a very good maching when it is working, but half the time it is unusable. This appears to be a design flaw. Can anyone help?
my lower loop is too loose and it gets jamed in the feed dog. the thread come out easily.
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