Usually found in newer "offline" capable machines. These communicate via standard USB-to-Serial com ports and run on open-source firmware.
: If your machine moves further or shorter than expected, you must calibrate the "steps per unit" in the settings menu. 3040 cnc usb setup
Note: If any axis moves backward, invert the direction setting in your software motor tuning configuration or invert the direction mask bit ( $3 ) in GRBL. Running an "Air Cut" Usually found in newer "offline" capable machines