After threading the machine, when I try to sew, the thread keeps tangling in the bobbin. I'll be most grateful if you can tell me what to do about this. Blessings, LaVerne

The motor locked up because the thread is tangled.
Solution:
Remove the tangled thread before continuing the operation.
Clean the bobbin case to remove the tangled thread.
After cleaning the bobbin case, insert the bobbin case properly.
If the needle is bent or broken, replace the needle.
Then, thread the upper thread properly, and continue the operation.

Make sure you are putting the bobbin in right side up. Some times it will do this if your needle size is incorrect to the fabric weight.

The motor locked up because the thread is tangled. Remove the tangled thread before continuing the operation.Clean the bobbin case to remove the tangled thread. After cleaning the bobbin case, insert the bobbin case properly. If the needle is bent or broken, replace the needle.Then, thread the upper thread properly, and continue the operation.
brother sewing machine

Is it getting tangled while you're spooling the bobbin on the top right corner of the Singer 1507 machine? If this is the case, you have to pull the thread through the top tiny hole in the bobbin, and hold on to the thread end. Then click the bobbin to the right to lock it in place, power up your machine. Keep holding the thread as you begin spooling the bobbin. Let go of the thread once the bobbin starts to spin a few rounds and the thread should not get tangled.

It has to be in the threading, either your thread is tangled, or incompatible with your bobbin thread. How is your needle?
Is the thread that is tangling from the bobbin? If, so you have your bobbin inserted upside down and the thread is not unwinding right. If, all that does not work, call Janome at 1-800-631-0183 before 5pm est

Before adjusting the bobbin tension (small screw on the side of the bobbin case), try this.

Always thread a sewing machine with the presser foot up as this opens the tension control for the top thread so the thread can be properly seated for control when stitching.

Often what appears to be a problem with the bobbin thread is actually the top thread going loosey-goosey.

Oil the bobbin holder. Wipe small amount of oil on outside diameter of bobbin holder. Replace.

Also try using better quality thread. Some thread is not consistent in diameter or has lots of small fibers - it will not got through the eye of the needle easily and will become tangled.

Hello,
Here are a couple of things to try.

* Un-thread your machine and remove your bobbin. Clean any loose thread or lint out of your
bobbin case. Re-thread your machine, reinsert and re-thread your bobbin.

* Change your bobbin
There could be a nick along the edge of your bobbin spool that’s catching your thread as you
sew.

* When you start to sew a seam, grasp the upper and bobbin thread tails. Hold them back
and out of the way as you sew your first couple of stitches. This will keep them from getting
caught in your machine.

I hope this helps.

To address my needle thread tangling (horribly) in the bobbin compartment, I rethreaded the bobbin. I cleaned the bobbin and the feeder feet, I changed the bobbin and the thread. I changed the tension on the needle thread and the bobbin thread. NO FIX! Then, I changed the needle - the problem was fixed instantly. I sewed awhile and then put the original needle back in. No problem. I think perhaps that the problem is being caused by the needle getting out of alignment somehow during sewing. If you are having the same issue, try it. It can't hurt!

This is a timing problem and will have to be repaired by authorized dealer.