You will probably have the most trouble with getting the existing drives to work with Masso, servos are mostly just servos and compatible with a large range of drives,that being said Fanuc servos can need special wiring solutions, and some drives unfortunately are proprietary in the was they receive step/direction etc, I’m not to familiar with Fanuc drives, but I do know they are one of the more supported systems out there, with aftermarket drives and things compatable for retro fitting into new CNC builds.
id look into how the signals work with your drives and then compare that to what Masso outputs. The rest of the machine and the spindle is fairly straight forward.
