1. After finishing the work, insert the needle into the needle hole plate, lift the presser foot, and cover the machine head with the machine cover to prevent dust from entering.
2. When starting to work, first check the main parts, how heavy it is when stepped on, whether there is any special sound, whether the needle is normal, etc. If any abnormal phenomenon is found, it should be repaired in time.
3. After the machine has been used for a long time, it needs to be overhauled. If parts with large wear are found, they should be replaced with new ones.
