HE-240 when embroidering the bobbin thread is on top and bottom. How do I fix this?

SOURCE: top thread wraps around bobbin

Is it birdnesting under the bottom or it is actually getting tangled inside the bobbin case? I've had my machine for almost a year and don't think I've had your exact issue. Sometimes, when you do a stich over a already stitched portion, you may have a problem with the bobbin and I just generally stop and start it again. It is important that you use the correct needle and also use a good embroidery thread and stablizer. Another thing suggested is changing the needle after about every 5 designs. Also, check the bobbin case to make sure there's no fuzzies caught in it. I use "canned air" like you use on computer keyboards. I also only use 40 weight emboidery thread for the top and actual bobbin thread for the bottom. Other threads can really jam everything up. So it's been trial and error to find the right combinations. Good Luck!

SOURCE: Brother PE-150V bobbin thread

For embroidery, and zig-zag, and because the needle makes side movements, it needs more needle thread.
So try to keep you needle thread not very tight,
and tight up your bobbin case tension more, so that the two threads meet under the meterial.

SOURCE: Husqvarna Viking #1plus bobbin problem

I have changed stabalizers and the type of bobbin thread i am using (invisible poly) and it seemd to have solved the problem. Note: wind invisible thread very slowly and carefully it is like fishing line

SOURCE: top thread doesn't pick up the bobbin thread (Toyota sewing m.)

Hi! This may sound silly, but if you changed your needle and put it in backwards (which is easy to do), the top thread won't pick up the bottom thread. Take your needle out and check the flat side of the needle shank--which way is it facing? With a lot of the newer machines, the flat side goes to the back, but check your manual to make sure.

Let me know if this helps, ok?

Happy Sewing!

Robbie

SOURCE: bobbin thread won't engage.

The bobbin case is not in the shuttle.

Raise the needle to it's highest position.

Lift the lever on the back of the bobbin case and hold it open as you insert the case into the shuttle; arm on the case pointing up. You may have to turn a bit to the left or right - it will click when in place.