Ok.Lets start from the beginning.My idea was to make a cnc machin with 4 spindles. Each spindle will have to do different process. I want to implement it with 4 Arduinos. Perhaps with master-slave connection. I want somehow to send G-Code in text file. Each arduino in my opinion has to has an ID so I can sent the text file in the right location. After that I want the arduinos to start the process (G-Code) each with its own text archive. I hope I made myself clear.