A linear module is a mechanical device that converts rotary motion into linear motion. It consists of a motor, a screw, a nut, and a guide rail. The motor drives the screw to rotate, and the nut moves along the screw in a linear direction. The guide rail supports and guides the nut and prevents it from rotating with the screw. The nut is usually connected to a platform or a load that needs to be moved linearly.
The linear module can achieve high precision, high speed, and high load capacity by using different types of motors, screws, nuts, and guide rails. For example, stepper motors or servo motors can provide accurate control of the rotation angle and speed of the screw. Ball screws or lead screws can provide different pitch and lead of the screw, which affect the linear displacement and force of the nut. Ball nuts or sliding nuts can provide different friction and wear resistance of the nut. Linear guides or sliding guides can provide different rigidity and smoothness of the guide rail.

The linear module can be used in various applications that require linear motion, such as CNC machines, 3D printers, robots, medical devices, etc. The linear module can also be combined with other linear modules or rotary modules to form complex motion systems that can achieve multiple degrees of freedom and various motion patterns.