When debugging CNC vertical lathes, you need to pay attention to the following key contents:

1. Machine tool position adjustment: Ensure that the CNC vertical lathe is in a level and stable position. Use a level to check the levelness of the machine bed, spindle and worktable, and make adjustments as necessary.

2. Spindle system debugging: When checking the CNC vertical lathe for debugging, you need to pay attention to the following key contents:

1. Machine tool position adjustment: Ensure that the CNC vertical lathe is in a level and stable position. Use a level to check the levelness of the machine bed, spindle and worktable, and make adjustments as necessary.

2. Spindle system debugging: Check whether the rotation of the CNC vertical lathe spindle is stable, whether the verticality meets the requirements, and the parallelism between the spindle and the workbench. Adjust the axial and radial runout of the CNC vertical lathe spindle to ensure cutting accuracy.

3. Guide rail and slide block debugging: Check the clearance and smoothness of the CNC vertical lathe guide rail and slide block, and lubricate and adjust as needed to ensure that the CNC vertical lathe slides smoothly without excessive friction and vibration.

4. Tool installation and tool compensation: Install the tool, set the position and cutting parameters of the tool according to the machining process, and debug the tool length and radius compensation to ensure the cutting accuracy of the CNC vertical lathe and the surface quality of the workpiece.

5. CNC system debugging: Initialize the CNC system, including setting the coordinate system, determining the reference point, establishing the workpiece coordinate system, etc. Write the program according to the CNC vertical lathe machining process, and load and debug the program.

6. Lubrication system debugging: Check the working status of the CNC vertical lathe's lubrication system to ensure that all parts of the CNC vertical lathe are well lubricated and that the sliding parts are fully lubricated to reduce wear and friction.

7. Cooling system debugging: Check the working status of the CNC vertical lathe cooling system to ensure that the tool and workpiece can be cooled in time during the CNC vertical lathe cutting process, and chips can be removed to improve processing efficiency and workpiece quality.

8. Debugging of safety protection devices: Check various safety protection devices of the CNC vertical lathe, including limit switches, emergency stop buttons, protective covers, etc., to ensure safe operation.

CNC vertical lathe can ensure the normal operation and stable processing quality of CNC vertical lathe through the reasonable implementation of the above debugging content.