The EMX-MT-0421 is a four-axis motorized CNC (Computer Numerical Control) driver module developed by EMAX. This module is designed to provide motor drive, logic control, and feedback signals for up to four stepper motors. It can be used for applications such as CNC work, laser engraving, mechanical automation, material handling and warehouse automation. The module has inputs for step, direction, microsteps, endstop, limit switch, home switch and speed control. It is compatible with different motors and motor drivers, and with the different control mechanisms used in various stepper motor applications. With its simple design, this module is easy to use and configure.