Before using the double-column CNC vertical lathe, the following preparatory work can be carried out:

1. Environmental inspection: Check the working area where the machine tool is located to ensure that the surrounding environment is clean and safe. Clean the work area to ensure that it is free of debris and obstacles to ensure the normal operation and safe operation of the machine tool.
2. Power supply inspection: confirm whether the power supply is stable, and check whether the voltage and frequency meet the requirements of the machine tool. Make sure that the power wiring of the machine tool is correct to avoid electrical problems affecting the operation of the machine tool.
3. Lubricating system inspection: Check whether the lubricating oil in the lubricating system is sufficient, and check the working condition of the lubricating system. Ensure the normal operation of the lubrication system to ensure the lubrication and cooling effect of each part of the machine tool.
4. Check the status of the machine tool: Check whether all parts of the CNC vertical lathe, including guide rails, guide rail guards, tool holders, and spindles, are in good condition. Ensure the normal operation of all parts of the machine tool and are not damaged.
5. Preparation of materials and tools: Check whether the materials and tools required for the work are complete. Including tools, fixtures, workpiece materials, etc. Make sure all required tools and materials are ready for handling and processing.
6. Pay attention to the operation manual: read and be familiar with the operation manual and related instructions of the CNC vertical lathe, and understand the characteristics, operating procedures and safety precautions of the machine tool. Familiar with the operation interface and functions of the CNC system to ensure correct operation.
7. Inspection of safety facilities: Check whether the safety facilities around the machine tool are complete, including emergency stop buttons, protective covers, safety doors, etc. Ensure safety devices are reliable and can protect operators from potential risks and injuries.

These preparations help to ensure the normal operation and safety of the CNC vertical lathe during operation. Before starting the actual operation, be sure to prepare and operate in accordance with the machine tool manufacturer's recommendations and operating manuals to ensure the smooth progress of the operation and the safety of personnel.