The hardware only understands machine language for it to execute most of the function from the software component. You need a tool that uses the CAD concept to manage the commands. This is one such tool that runs the conversion process of the G-Code commands to machine language through the parallel port connections. This is a special tool designed for the CNC devices that incorporates the servo and stepper motors. The application reads the commands in the NC file format to aid in the CND controller.
The interface is simple but you need a little knowledge due to the technicality of the functions. Moreover, you have the tool to monitor and analyze the X, Y, Z figures. The G-Code simulation supported on the app comes in handy to manage the logical errors in the creation of the program. Being a CAD concept app, it supports various BD components which include interpolation, linear and circular simulations, axis limits, emergency button among others. This is a complex application that needs an expert in handling programming languages.
It is part from science category and is licensed as shareware for Windows 32-bit and 64-bit platform and can be used as a free trial until the trial period will end. The XproMill demo is available to all software users as a free download with potential restrictions compared with the full version.