When using a CNC vertical lathe, the following points need to be noted:

1. Safe operation: Comply with the safe operating procedures and operating manuals provided by the machine tool manufacturer, and ensure that the operator is familiar with the safe operating procedures of the equipment. Use necessary personal protective equipment such as safety glasses, gloves, etc. to prevent accidental injuries.
2. Programming and setting: Correctly write and set CNC programs to ensure accurate cutting parameters and machining path settings. To verify the correctness of the program, you can use the simulation function to test the program to avoid equipment damage or unqualified workpieces due to program errors.
3. Tool inspection and loading and unloading: Before using new tools, check to ensure that the quality and condition of the tools are good. Install and remove tools correctly, following the installation instructions and operating procedures provided by the machine tool manufacturer.
4. Workpiece clamping: Ensure that the workpiece is firmly clamped and use appropriate clamps and clamp force to prevent the workpiece from shifting or flying out. Regularly check the workpiece clamping status during processing to keep the clamping force constant.
5. Lubrication and cooling: Keep the lubrication and cooling system of the machine tool operating normally. Check the lubricant and coolant supplies regularly and replace and maintain them according to the machine tool manufacturer's recommendations.
6. Quality inspection: Regularly conduct quality inspections on processed parts to ensure that they meet the requirements. Use measuring tools to verify accuracy and dimensions to avoid defective parts.
7. Machine tool maintenance: Carry out necessary machine tool maintenance according to the maintenance manual provided by the machine tool manufacturer, including cleaning, lubrication and checking the status of each component. Carry out regular maintenance and upkeep to ensure the reliability and performance of machine tools.

Please note that the above are general considerations only. Specific usage precautions and operating details should be based on the specific CNC vertical lathe you are using and the operating manual provided by the manufacturer. In addition, always remain vigilant during operation and promptly resolve equipment failures and abnormalities to ensure the safety and effectiveness of operations.