First and foremost, we must understand that a CNC lathe is an automated machine tool equipped with a program control system. This control system can effectively process various programs according to specified instructions and decode them, thereby enabling the machine tool to accurately machine parts. Also known as a numerical control (NC) lathe, it is referred to as "computer gong" 

     In Hong Kong, China and the Pearl River Delta region. Based on motion mode, CNC lathes are divided into sliding head machines and fixed headstock machines. The overall structural composition of a CNC lathe is basically the same as that of a conventional lathe, meaning it also has basic components such as the bed, spindle, tool turret, carriage, and tailstock. However, conventional lathes do not have CNC-specific components such as the operation panel and display monitor.

     P.S.: A sliding head machine is a high-performance, high-precision, low-noise automatic sliding head lathe that controls the machining process through cams; whereas a fixed headstock machine, fully known as a fixed headstock CNC lathe, is a precision machining equipment capable of performing compound processes such as turning, milling, drilling, boring, tapping, and engraving simultaneously. Both types are CNC lathes. 

    Currently, the vast majority of CNC machine tools on the market generally consist of the following four parts: the machine body, the control unit, the drive system, and auxiliary devices.

I. Machine Tool Body

      The machine tool body is the mechanical part of a CNC lathe, mainly including the bed, base, column, crossbeam, slide seat, worktable, spindle box, feed mechanism, tool post, and automatic tool changer, etc. It is the mechanical part that automatically completes various cutting operations on CNC machine tools.

      Adopt new machine tool structures with high stiffness, high seismic resistance, and minimal thermal deformation. Usually, the rigidity and seismic resistance of the main machine tool are improved by methods such as increasing the static stiffness of the structural system, adding damping, adjusting the mass and natural frequency of structural components, etc.

      The methods to improve the rigidity and anti-vibration performance of machine tool host usually include: 1. Increasing damping; 2. Adjusting the mass of structural components; 3. Adjusting the natural frequency; 4. Improving the static stiffness of the structural system; where static stiffness (The static stiffness) is the ability of the structure to resist deformation under specific static excitation.

     Modern CNC machine tools widely adopt high-performance spindle servo drives and feed servo drive units, shortening the transmission chain and simplifying the structure of the machine tool's mechanical transmission system.

II. Control Section

    The control section is the core of a CNC lathe, generally including a dedicated computer, liquid crystal display, control panel, and strong electrical control system (which contains machine tool printed circuit boards, screen displays, keyboards, paper tape TAPE, magnetic tapes, drive circuits, etc.). The program instructions input into the control section are recorded on information carriers and received by the program input device, or directly manually entered via the keyboard of the control section.

    Here, the term 'paper tape TAPE' refers to a medium for storing programs. Programs were recorded on the paper tape using a punch machine, and then the programs recorded on the paper tape were input into CNC machine tools. However, with the development of storage technology, paper tapes are no longer used to record programs. Nowadays, programs are mostly recorded using fast flash memory or disks. 'Tape' and 'disk' are components that have evolved from 'paper tape' and are commonly equipped in modern machine tools.

III. Drive Unit

    At present, the commonly used drive devices in CNC machine tools are mainly divided into four types: servo motor drive devices, stepper motor drive devices, DC motor drive devices, and AC servo motor drive devices.

   1. Servo motor drive device. It has characteristics such as simple structure, high positioning accuracy, high power output, and a wide speed regulation range. It is widely used in CNC machine tools with higher processing quality requirements and more frequent actions, especially CNC milling machines, CNC lathes, etc.;

   2. Stepper motor drive device, which has many advantages such as high precision and stable low-speed driving. This drive device achieves the position and control speed of the machine tool axis by controlling the distance and frequency of each motor step, thereby accurately controlling the movement state of the machine tool. Stepper motor drive devices are commonly used in CNC machine tools with high precision requirements and low rotational speeds (such as printing machines and winding machines).

   3. DC Motor Drive Device. It has advantages such as simple structure and excellent speed regulation performance. It usually achieves motor speed and torque control by converting DC voltage. It is suitable for CNC machine tools with large speed variation and high precision requirements, such as CNC drilling machines and CNC boring machines.

    4. AC Servo Motor Drive Unit. This is a drive unit that integrates a servo motor and a frequency converter. It features compact structure, fast response speed, and smooth operation. The AC servo motor drive unit achieves motor speed and position control by regulating the power supply frequency and phase difference. It is suitable for high-precision, high-speed motion CNC grinders, CNC machining centers, etc.

IV. Auxiliary Devices