A four-axis motion control board designed for CNC engraving, routing and automation, delivering reliable axis control, tool probing, safety inputs, and spindle speed control through MACH3. - Function: supports automatic probe tool, emergency input, limit switch, and mounting brackets for connecting an electronic steering wheel, enabling quick integration into complex machines. - Features: supports 4-axis binding; connect four stepper motor drives or servo control; 4 general inputs for devices such as limit switch, Estop, probe, zero return, and more. - Performance: maximum step pulse rate up to 100 kHz, making it suitable for CNC engraving, servo motors and stepper motors. - Advantage: requires an external 24V DC power supply to isolate USB and external ports for a more stable system; includes a 0-10V output port to control spindle motor speed with MACH3 software. Use scenarios - 4-axis CNC router for engraving or light milling, with probe tool, limit switches and Estop for safe operation. - Servo or stepper driven automation system requiring reliable multi-axis control and probe/zero-return inputs. - CNC setup using MACH3 to vary spindle speed via the 0-10V output, enabling integrated spindle control.