Brother embroidery machine 770 bobbin thread bunches up when embroidering

SOURCE: Embroidery Problem with my disney

Check your bobbin case. Thread the bobbin through your bobbin case while holding it in your left hand. Pull the thread with your right hand and feel if there is any resistance. If not, you need to adjust the tension on the bobbincase. Also check if a piece of thread or fluff did not get stuck between the tension blades on the bobbin case. If you are not sure how to adjust the tension on the bobbin case, ask your dealer to do it.

SOURCE: Brother Sewing Machine model:CS8150 bobbin thread problems

The top of the machine is not threaded correctly. First raise the presserfot then rethread the machine. Bottom looping is usually caused by a lack of top tension. There could allso be a bur on the hook.

SOURCE: bobbin thread comes out on top

You need to read the section of your manual that talks about thread tension. That occurs when your thread tension is off.

SOURCE: My Disney Brother SE-27OD Embroidery Sewing Machine/trouble

Can you buy embroider memory cards with out down loading on your PC?

SOURCE: Thread tangles under throat plate while embroidering

Could the little hook that is stuck over the bobbin area be the thread cutter? My thread cutter gets stuck there and I have to turn my machine off and then try to use the cutter to reset it to its "resting" position.