I have an 1980 AX25N Ikegai lathe with the 6T-a control. The machine is almost bullet proof as long as its working. BUT if it shuts down, your in for hell. These machines were made by Fanuc-Fuji and know one will help you with info because the company no longer is around. The only one I found in 5 years that has info on it is Ikegai, but they have no info on the control side. I bought mine broke and it took 2 years to get it running, but for 3 years later its working fine.
Also these machine must have balanced 3 phase power. I tryed a converter and it cost me about 1000 dollars in used boards to fix it. Hope this helps
Mike