If the motor of the CNC lathe fails, the following steps can be taken to troubleshoot and deal with it:

1. Safe shutdown: First, make sure to stop the operation of the machine tool and disconnect the power to prevent further damage or personal injury.
2. Check the cables and connections: Check the cables and connections between the motor and the CNC system to make sure they are securely connected and not loose, broken or corroded. Reseat or reconnect the cable to make sure the connection is stable.
3. Check the power supply and fuse: Check the power cord and fuse of the motor to ensure that the power supply is normal, and check whether the fuse is blown. Replace a blown fuse if necessary, and make sure there are no broken or shorted power cords.
4. Check the motor parameter setting: enter the motor parameter setting interface of the CNC system, and confirm whether the motor parameter setting is correct. Check the rated current, speed, acceleration and other parameters of the motor, which are consistent with the specifications of the motor and the requirements of the machine tool.
5. Backup and restart the CNC system: If the failure of the motor is caused by the software problem of the CNC system, you can try to backup and restart the system. Turn off the CNC system, wait for a while and restart it, and restore the backup settings. This clears temporary errors and resets the CNC.
6. Call professional maintenance personnel: If the above steps cannot solve the problem or require more in-depth troubleshooting and repair, it is recommended to contact professional maintenance personnel or the technical support team of the CNC equipment supplier. They can provide professional help and advice, and repair or replace faulty motor parts on a case-by-case basis.

Note: When troubleshooting and dealing with CNC lathe motor failures, be sure to follow safe operating procedures and use appropriate personal protective equipment. If you do not have enough knowledge and experience in electrical aspects, do not disassemble or repair the motor without permission, so as to avoid more serious damage or danger. Seeking the help of professional maintenance personnel in time is the best choice to ensure safety and solve faults.