I have a janome 5124 and the bottom stitching is breaking every so often. I have cleaned the bobbin case , put a new needle in but it still won't work?
Could be one of multiple problems. Be sure to use only fresh, good quality thread--no old or bargain bin threads. Check if there is a burr or rough spot somewhere in the bobbin thread path that is catching the thread and breaking it. (You can hand rotate the handwheel and watch the needle/thread action in the bobbin area and watch what is happening.) It could be that the bobbin thread tension is too tight, or the bobbin case may even need to be replaced (they do wear with use).
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Could be one of multiple problems. Be sure to use only fresh, good quality thread--no old or bargain bin threads. Check if there is a burr or rough spot somewhere in the bobbin thread path that is catching the thread and breaking it. (You can hand rotate the handwheel and watch the needle/thread action in the bobbin area and watch what is happening.) It could be that the bobbin thread tension is too tight, or the bobbin case may even need to be replaced (they do wear with use).