When sewing the needle thread gets looped in the hook cover plate. It will sew a few stitches and then gets hung up. We have tried re-threading both the needle thread and the bobbin, new needle thread and bobbin thread, taking off the needle plate, and cleaning out. Any suggestions?
The solution that I found last night was the thread tension. I have never touched the dial, only had it set on 'auto." When I started playing with it, I realized the top thread should be really easy to pull through the machine and it wasn't. I started turning the dial (to 3 or 4) and the thread slid through the machine perfectly. No more birds nest! I really thought it was bobbin initially because of the horrible sound it was making.
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Skipped stitches sometimes occur if the machine is incorrectly threaded. Remove the thread and re-thread from the beginning (first RAISE the presser foot so the thread will seat in the tension disk). Confirm that the thread follows the correct pathway (consult manual). Try installing a brand-new needle. Make sure the needle, thread, and fabric are compatible.
i should know whether the loop is upside or downward, its opposite tension adjustment , if the loop is downward position, tighten the upper thread tension , if the loop is upward then tighten the lower bobbin tension
try sewing a wide zig zig stitch and check the stitch formation, is it catching on both sizes of the zig zag or perhaps only one side.
Timing out means that the timing sequence between the needle going down to its lowest point is not in sync with the rotary hook coming around behind the needle to catch the thread tail behind the needle eye.
You could also remove needle plate, sewing foot and bobbin, and hand wind the flywheel through a stitch sequence and watch the needle and rotary hook movements. When the needle is at its lowest point, the rotary hook should be right behind it.
Adjusting timing is not something I would tackle myself though, I leave that to the technician.
I have a Janome 9000, was sewing and broke needle, replaced and broke another. I didn't have machine threaded, took out bobbin and would sew a little and stop saying thread broke. I took off top plate and started machine again, sew a little and stop saying thread broke. So I took out bobbin case and sewed again and stopped repeating the message. Everything looks OK, bobbin case and top plate. I guess I want to know if the timing could be off or do you think it is the computer part of the machine...Should I take it to the Sewing Machine Shop??