I bought a used cnc router from a private party. I saw the machine in operation and know it works. I purchased a Mach3 program and lic. and thought it would be a plug and play deal. Boy was I wrong. I have installed the software and got it to run in the computer. I just can not get the computer to talk to the router. In the dig. scrn, the ports do not light up and I can access the motor tuning. Any help would be appreciated.
Bob