The USB 100KHz Motion Controller Card Breakout Board is a highly functional and versatile controller designed for CNC engraving machines, stepper motors, and servo motors. It supports critical functions such as automatic probe tool, emergency input, and limit switch, and it is compatible with electronic handwheels. The card allows 4-axis linkage, making it possible to connect up to four stepper or servo motor drives, providing flexibility for complex machining operations. It features 4 general-purpose inputs, which can be configured to handle limit switches, emergency stop switches, probe switches, and back-to-zero commands. The motion control card operates with a maximum step-pulse frequency of 100KHz, ensuring smooth and accurate CNC performance. It is powered by an external 24V DC power source, which isolates the USB connection from external ports, increasing system stability. Additionally, the card includes a 0-10V output port, allowing spindle motor speed control via software. For added versatility, the controller has 4 general-purpose isolated relay drive output interfaces, which can be used to control the spindle start, forward and reverse rotation, pumps, and other peripheral devices. This motion controller card is an excellent choice for CNC engraving and other stepper or servo motor applications.