1. It is strictly forbidden to pull the fabric, and it is strictly forbidden to force the handwheel.
2, stop immediately, power off.
3, cut all the thread ends, take off the transparent cover of the bottom shuttle, gently take out the thread, it is strictly prohibited to pull hard! ! !
4. Remove the needle.
5. Disassemble the needle plate and take out all the cloth and thread ends that are caught.
6, replace the needle. The needle must be abolished after a serious card line.
7, polishing the bobbin case burr.
8, clean the bottom shuttle and reinstall.