We've all been here.
Take a deep breath. Don't turn your tension dial. Don't jump.
Over the next couple of weeks, I will share troubleshooting tips that will help you diagnose a true problem, or user error, at home. So you can spend more time sewing and less time schlepping your machine to my store. I know you love seeing me and all, but I think we all know there isn't enough sewing time to begin with!
Contrary to what common sense tells us, naughtiness underneath your fabric does not usually mean there is something wrong with your bobbin, which is physically located underneath your fabric. It's actually the opposite - issues underneath your fabric point to the top of your machine being the culprit. Generally speaking, if you're getting looping/nesting/terrible stitches, but the machine is in fact stitching, the issue is the upper tension.
NO, DON'T TOUCH YOUR TENSION DIAL!
Your problem is most likely that the thread isn't in the tension device. So, messing around with the dial will not only make no difference whatsoever, it'll just mess iup your tension setting for when you do eventually get the thread into the device correctly.
Your tension device is comprised of two silver metal discs. When your presser foot is up, these discs are open and ready to receive thread. When your presser foot is down, the discs close and apply the correct tension to your thread. Many are taught to put their presser foot down when threading their machine, because it makes threading the needle easier. This is a bad habit, because threading the machine with your presser foot down reduces your chances of getting your upper thread correctly into the tension device because it is closed.
Pro tip: Begin threading your machine with your presser foot in the up position. Once you have gone through the tension device and the take up lever, stop and put your presser foot down. Pull the thread. Is it harder to pull? Good, that means it's correctly in the device. Does it feel the same as when you were threading it with your presser foot up? Start over, your thread is not in there right.. Once you know for certain the upper thread is nice and cozy in the tension device, proceed as normal. If that means putting the presser foot down so you can thread the needle, go ahead!
There are two very annoying things that happen when you thread the top of your machine wrong. The first one is the above mentioned looping/snarling/nesting/whateveryoucallit. The second is jamming. The machine stitches in more or less one place, a pile of snarling thread accumulates under your fabric. It jams. It gets stuck. You basically have to take the entire machine apart to get the fabric out. It's the worst. It's also the take up lever.
In my experience, when the machine just stops and jams, it's because I either missed the take-up lever during threading, or the thread fell out of it. (This is my way of making myself feel better about missing the take up lever. Obviously, it fell out.) I'm sure many of you are asking: what is a take up lever?
It's this fellow here, that swings up and down while you're sewing:
Take Up Lever Selfie!
When in doubt, if your machine is acting crazy, just re-thread it. Top and bottom. Still acting crazy? Leave a message for me in the comments, call me at the store, or shoot me an e-mail. I'll help you troubleshoot as best as I can!