Can you do a photo of the machine information tag
Why would you have a 5Hp phase converter for you manual mills, a simple VFD is all you need to run them, which is more efficient than any type of phase converter
Some of these mills you can run on single phase, most have a 7.5 Hp spindle motor so you will need at least 60 Amp supply @ 240v if you live in NA what servo motors ? Drives does it have