I'm merging a honkin' ton of threads all about the same issue. So let's just start off by saying what's wrong and what can be done to fix it!The number one problem that people come to the boards with is threads bunching up, wadding up, making a general mess on the underside of whatever they're sewing. This is probably a simple fix! Make sure your machine's bobbin is threaded properly! This is the most likely cause for all your issues.
How to properly insert your bobbin
(This tute is for Front load bobbins NOT Top load bobbins, sorry!)
Take out your bobbin casing and your bobbin. Set them this way, with the bobbin casing arm sticking up and the thread on the bobbin winding COUNTER-CLOCKWISE.
Flip your bobbin case over to the other side (Don't turn it, flip it!)
Pick up your bobbin and put it in the case. Make sure you have the thread in hand.
With the bobbin now inside the casing, pull the thread into the channel on top of the casing.
Now pull the thread over toward the left and under the metal piece.
Keep pulling the thread over toward the opening until it snaps into the correct position.
You now have the bobbin in the casing correctly!
Now, turn the casing around.
Pulling on the flap (I don't know the real name!) insert the bobbin case into the housing. You'll see a notch were the case arm should go, make sure you're heading that way!
Put the arm in the correct place and let go of the flap.
Now, when the top thread is threaded correctly (this will vary by machine) You can see how the top thread (black) will come loop around the bobbin casing and pull the bottom thread up.
You're ready to sew!
this is off topic, but i cant figure it out: how do i use a sewing machine?
i have it all threaded but i dont know....am i supposed to just go one stitch @ a time?
also: my thread bunches and breaks
...any suggestions?thanks so much!