Is it possible to use an arduino as an atc, with mach3. I mean I realize its not a plc but it can communicate to the physical world in multiple ways. I really just dont want to buy a plc if my arduino that I already own can do the job. Im not up for trying to write a plugin for the arduino to be compatible with mach3, but i am under the impression that plc's dont need that so why would the arduino? I just would like some input on this. I am a newb to everything except for actually programming a machine and actual machining. The rest is currently greek to me, well other than a little self engineering. As far as programming stuff other than something that uses gcode im pretty lost. Thanks in advance for your input.