Fully automatic CNC lathe maintenance requires certain professional knowledge and skills. Here are some tips you may use during the repair process:

1. Safety precautions: Before performing maintenance work on CNC lathes, safety operating procedures must be followed. Make sure the lathe is powered off and take appropriate safety measures, such as locking the switch, cutting off the power, and wearing protective equipment.

2. Fault diagnosis: Master the skills of CNC lathe fault diagnosis and be able to quickly and accurately find the root cause of the problem. Use instruments, testing tools and technical means to carefully inspect each system.

3. Understand the CNC system: Understand the basic principles of the CNC system, including knowledge of electrical, electronic and computer control. Be familiar with CNC programming and parameter settings to better identify and solve problems.

4. Check the sensors and controllers: CNC lathes regularly check the status of sensors and controllers to ensure their normal operation. Clean the sensor surface to prevent dust or oil from affecting its sensing effect.

5. Lubrication system maintenance: CNC lathes should regularly check and replace lubricating oil to ensure that each component is properly lubricated. Pay attention to the working condition of the lubrication system to prevent failures caused by insufficient lubrication.

6. Check the electrical system: CNC lathes should regularly check the wiring and connection parts of the electrical system to ensure that the cable connections are firm and the electrical components are normal. Pay attention to whether there are leakage, short circuit and other problems.

7. Tool and tool holder maintenance: CNC lathes should regularly check the wear status of tools and tool holders, and replace seriously worn tools in a timely manner. Calibrate tool position and tool length compensation.

8. Machine tool accuracy adjustment: Understand the basic structure and working principle of CNC lathes, and be able to adjust the geometric errors and accuracy of the machine tools to ensure that the machine tools run in the best condition.

9. Spare parts management: CNC lathes should establish a reasonable spare parts management system to ensure adequate supply of spare parts, especially some commonly used wearing parts. Replace aging or worn parts promptly.

10. Training maintenance personnel: CNC lathes provide regular training to maintenance personnel so that they can master new technologies and maintenance methods. Maintain the professionalism of the maintenance team.

These techniques are some basic principles that may be used when performing maintenance on fully automatic CNC lathes, but the specific maintenance work still needs to be adjusted and performed according to the specific machine tool model and fault conditions. If you are not sure how to perform repairs, it is recommended to seek professional technical support or contact the device manufacturer.