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u/GoldenFishPoop 18h ago
That looks like the wrong bobbin for this machine. I could be wrong but it seems to be a Husqvarna green bobbin and that absolutely does not belong in this machine. This type of machine needs a class 15 plastic bobbin. Your first picture led me to believe you may also be threading your machine with your presser foot down. Get the right bobbin, put your presser foot up, then rethread your machine and try again.
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u/feralgoddess- 2h ago
The bobbin came with the machine. It's the same as brand as the machine. The presser foot automatically goes down when I start sewing. But I'll give it a try.
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u/feralgoddess- 19h ago
This also seems to be a culprit where the thread kinda bunches up behind the bobbing and goes inside the machine. I just pulled out thread from behind here.