Toyota basic
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
Bobbin thread breaks
1. There is a right way & wrong way to insert the bobbin in the case --when you insert the bobbin in if it doesn't stitch correctly turn the bobbin over see if that helps or bobbin case is not inserted correctly
2. Lint has collected in the bobbin holder
3. The bobbin is damaged & doesn't turn smoothly
4. Lower thread tension is two tight
SOURCE: MACHINE COMES UNTHREADED
your bobin case needs to be tighten there is a screw on the case turn the screw to tighten .good luck.
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: my thread keeps om breaking i have juki lu1508n please help
try extending the looper just a hair. loosen the screw and pull past the stop just a fraction.
SOURCE: Upper Thread Breaks!!!
Hi, here are some reasons why the thread is breaking :-)
Hope this helps.
SOURCE: thread keeps breaking on sewing machine
Probably just the needle. Try turning it 180 degrees
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