converting a tos/intos fngj 40

Hi,I am owner of a fngj 40 milling machine, which i want to convert to linuxcnc.
The x and y axis are already converted to ballscrews.
The machine mounts a broken acu rite 2 axis cnc control
At first look the glass scales seem to be incremental with index.
The servos seem to be brushed analog servos.
Thats what i know at the moment.
Now to my questions
- the Z axis mounts a acme thread with a revolving nut, which makes a conversion to basscrew a bit complicated, so if anyone has an idea or already converted such a machine, i would apreciate some help.
- I would like to realize the control with a j3455 and mesa cards. I would like to reuse the analog servos, encoders and maybe add 2 step dir axis. And of course i would need 5/5 or so digital i/o. What would be a good choice?
- does anyone know if those acu rite millpwr servo drives can be reused with lcnc/mesa hardware?
I an pretty shure there will be some questions over the time, so thank you in advance.

Thank you for the suggestion, i have edited the initial post and added some photos and changed everything to be a bit clearer about the machine as a whole. I will add some more photos as i am progressing with modifing it.

Oooh, nice. I always liked these.

For reference, these are basically the same is a MAHO, so all the same rules should apply.

Mine had the revolving nut for the z ram. But they way they did it was to have a normal ball screw nut mounted in a rotary mechanism. So check over what you have there already, it may be reusable with a normal ball screw.

As to the electrical... Mesa 7i77 would be where you start for analogue with quadrature encoders, but I would have in the back of my head replacing the servos with new ones.

Thanks. I screwed up my numbering.

Are those encoder analog ones or digital ones?
I have attached photos of the servo drives, do they accept -+10v commands and do they need anything else ( except power of course )?
@ihavenofish: is there a reason for replacing the servos?
 

Z on these machines is the ram, it is a horizontal axis.