I'm wondering about those 2 mills in the CC that don't work. What kind of
machines are they? Are they genuine industrial strength milling machines
or are they those smaller types of machines with stepper motors that were
sold to the education sector?
I ask because if they're good solid machines they can be retrofit with new servos and CNC controllers like a Mitsubishi M70 at a very reasonable cost.
I used to teach Machine shop, and I had two little machines (I called them my
sewing machines!) that were hooked up to a PC with DOS. These machines usually had software on them that was provided by the motor mfg. There's lot of DIY CNC software on the net for these types of machines, but if the original mfg is out of business, then the chances are slim that you'll get them working without doing a retrofit.
For PLC progrmammers, most eletrical techs that do repairs on automation.
Hope I helped with some ideas for you
controls can read a ladder and most likely program a PLC.