After checking to make sure my machine is threaded correctly and checking the tension...the upper thread keeps breaking. I can't figure out why.
The top thread breaks
1. the needle thread is not threaded properly
2. The needle thread tension is to tight
3. The needle is bent or blunt
4. The needle is incorrectly inserted
5. The needle thread & the bobbin thread are not set under the presser foot when starting to sew
6. the threads were not drawn to the rear after sewing
7. The thread is either to heavy or to fine for the needle
8. Try a different spool or cone of thread
SOURCE: Bobbin thread breaks
Make sure your bobbin thread is turning clockwise as it sits in the bobbin case. There is a screw on the outside of the bobbin case you can turn with your thumb slightly to adjust tension. If you dangle the case from the thread and give it a light ****, it should move down slightly when doing so-an indicator of good bobbin tension.
SOURCE: top thread breaks when using metallic thread
Some machines just won't take metallic thread no matter what you do.
SOURCE: Thread Breaking On Brother Sewing Machine
if thread is good quality you may have a sharp groove in your needle plate hole from needle breakage. if so, polish with emery tape.
scott
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