6 axis plus spindle
I run a combo Mill/lathe, and I just have a profile for each and just switch between them, using the same axis drives.
if your REALLY need 7 true interpelated axis then mach wont do it for you.
if you need other motors to run more than 6 but the others dont have to be interpelated then you can run them trough an analog board, or PLC with HS pulse driver.