1. After the work is finished, insert the machine 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 you step on it, whether there is any special sound, whether the needle is normal, etc. If any abnormal phenomenon is found, it should be repair in time.
3. After the machine has been used for a long time, it needs to be overhauled, and if it is found that the parts with greater wear and tear should be replaced with new ones.
