For Drew,
Does your VB script for the HNC Turret changer require a PLC? How did you connect to the turret encoder, and air cylinders, to read the BCD code? Can it all be done through parallel port inputs and outputs? I'm doing an HNC and would really like to try out MACH3 if I can get by the Turret programming problem. The machine has a Fanuc Control with Fanuc 00 motor/encoders on it now, which are coming off.