Here are a few key areas to focus on when performing a CNC vertical lathe inspection:

1. The overall condition of the machine tool: Check whether the mechanical structure of the machine tool is intact, whether there are problems such as looseness, cracks or deformation. Check the lubrication of guide rails, ball screws and other moving parts to ensure the machine's motion accuracy and stability.
2. CNC system: Check the normal operation and connection status of the CNC system. Check that the control panel, display, and buttons are working properly. Test the functions of the CNC system, such as manual operation, zero return, running preset programs, tool switching, etc., to ensure the stability and reliability of the CNC system.
3. Spindle and tool system: Check whether the rotation of the spindle is stable and whether there is any abnormal sound or vibration. Check the tool clamping device of the tool system to ensure that the tool is installed stably and the clamping force is appropriate to prevent the tool from loosening or falling off during processing.
4. Tool measurement and calibration: Check the accuracy and functionality of the tool measurement system. Verify the accuracy and stability of the measuring device to ensure the accuracy and consistency of parameters such as tool length and radius.
5. Feed and positioning system: Check whether the movement of the feed axis and positioning axis is smooth and accurate. Verify the accuracy of feed speed and feed amount to ensure the machining accuracy and surface quality of the workpiece.
6. Safety equipment and emergency shutdown: Check safety equipment such as safety doors, light curtains, tool ejection devices, and emergency shutdown switches to ensure immediate shutdown and protect the safety of operators in abnormal situations.
7. Accuracy testing and calibration: Test and calibrate the accuracy of the machine tool using appropriate test tools and measuring equipment. For example, use measuring tools to check the dimensional and positional accuracy of workpiece machining to ensure compliance.
8. System maintenance and maintenance: understand the maintenance and maintenance process of CNC vertical lathes, including lubrication system, cooling system, tool replacement and cleaning, etc. Regularly inspect and maintain machine tools to extend their service life and maintain processing quality.

The above inspection suggestions are for reference only, and the specific inspection items should also consider the actual machine model, the inspection guide provided by the manufacturer, and the maintenance requirements in the operation manual. To ensure safety and accuracy when performing machine tool inspections, it is recommended that inspection and maintenance procedures be performed by trained technicians or service personnel.