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OK, Nylon thread and vinyl fabric are difficult. Try this: 1. Be sure your machine is *very* clean - no leftovers from previous projects. 2. Take the bobbin receiver out (need a screwdriver to hold the release), clean it and all around it and re-insert. When you re-insert in this machine, hold the release lever with the screwdriver, push the receiver away from you (under the feed dogs) then bring it back toward you so it catches before you release the catch. 3. Use a stitch length just a bit longer than you 'normally' would - 3+ for vinyl. 4. Wind your nylon thread onto a bobbin *very* carefully. It's easy to get it caught so that it won't feed evenly. 5. Be sure your upper thread is in properly, and that it doesn't catch on anything. 6. Adjust your upper tension tighter than 'normal' to accomodate the slippery thread your're using - do this a little at a time, it's easy to miss the 'sweet spot' if you adjust too much. 7. Be sure to bring up your bobbin thread and hold both threads as you start to sew - hold them for 3-4 stitches. 8. Sew slow - this machine can go *really* fast, but don't let it on this project. It will catch better if you take it slow and easy.
Hope all this helps. If not, you'd probably better take it in for service.
Your sewing machine tension
controls the rate at which the thread is fed through either the upper
section of your machine or through the bobbin case. If your upper or
bobbin threads aren't threading properly, sometimes adjusting the
tension will correct this problem.
Your sewing machine works by
passing the upper thread through the needle of the sewing machine at
precisely the same time the bobbin brings its thread to its uppermost
position. If either the needle or the bobbin thread reach these
positions too soon or too late, the threads won't interact and create
the knots that make the seam. You can throw off your timing by sewing
too many layers of fabric or hitting a pin with your needle. See you
sewing machine repair facility to correct any timing issues.
Thread can get snagged or caught
in the upper section of your machine or on lint pieces in the lower
bobbin section. If your threads aren't catching properly, you may be
able to fix it by unthreading and rethreading both your upper thread and
Brother machines are usually a very good brand. Sounds like you are having a small problem with threading..........I know how frustrating that can be!
Start over....totally from the beginning. First, clean the machine of all dust, I use a small paint brush to remove lint from the bobbin case area. Oil the machine. Remove all the thread from the machine, use a different bobbin and rewind it with new thread. Make sure the bobbin thread is the same as the thread you use to thread the upper needle with. Use a new needle that is the appropriate size for your sewing project. Check to make sure the feed dog is moving when you turn the wheel that raises the needle up and down. New needle, new bobbin, new thread......before you place the fabric under the presser foot (and with the presser foot raised), turn the wheel one complete rotation to allow the upper needle thread to catch the bobbin thread. Gently pull both threads out towards the back of the machine, making sure the bobbin thread is now coming up through the little hole in the feed dog plate. Place fabric under the presser foot, lower presser foot and as you slowly start to sew, make sure you have the bobbin thread pulled with slight tension out from the back of the needle. This will take up any slack in the bobbin thread and keep it from making a knotted mess. Good luck, I hope this helps.
Sounds like you have to take off the throat plate and clean out threads under it. Sometime they ball up and prevent the needle from going down and catching the bobbin thread. You can't see themuntil you take off the plate. Follow the directions. It is easy.
Make sure your needle is in correctly. Check your threading again.
If that does not work, remove throat plate, install new needle, turn hand wheel until needle is at its lowest position and observe if the hook is exactly behind the eye of the needle. If that is correct then you do not have threaded correctly. If it is not then the machine needs to be re-timed.
I've just had this exact problem with my model 2037. The problem, according to 3 shops I've taken mine to, is that the shuttle hook (the metal piece that the bobbin sits in) is broken and needs replaced. Problem is, the piece is next to impossible to find.