Mach3 and Mach4 need to be configured to match the way your machine is physically wired and tuned appropriately for your hardware. Whoever built the machine will have this information, though much of it can likely be found in the documentation for the hardware or even reverse engineered if necessary. Some settings will be the preference of the designer/operator. All settings for Mach3 are covered in the “Mach3Mill Install and Config Guide” available from the Product Manuals page. For Mach4, refer to the Mach4 documentation as well as documentation for your motion controller, as many settings are handled within their plugin.