can anyone point me in the right direction?
I recently picked up a nice biotech xyz table.
I've confirmed that the components themselves work but want to convert it into a CNC router / 3D printer.
The table uses med size DC servo motors for all movement and has the original PSU.
I have looked all over and have yet to find an arduino based solution for a servo CNC
Your biggest problem is you dont appear to have a suitable "Servo Controller", many of the new "Servo Motors" have a controller built in and will accept step and direction signals in the same way as a stepper controller but way better precision and more constant torque across the speed range
The cost for you / or time (If your expertise allows for it) will be in writing software to replace the servo closed loop and integrate into a 3D printer control board like RepRap 1.4 or any other for that matter.99% of the cost effective ones expect to output step and direction pulses and or contain the stepper drivers on board.
I think your best bet as you have what appears to be an excelent hardware platform is to replace those servos with nema 11 or 17 steppers. The drivers you're quoting are for steppers.
You dont show enough detail on the small PCB to the left of the motor, is it possible this is a servo driver with integrated feedback control?, what is the chip on their ??
please show a fuller view of the mechanical platform and any other parts you may have for this ?
I am in the process of producing a series of videos specifically about creating a home built motion control system and this will be focused on all the modules needed to create a complete system
This includes completing a CNC Router, Upgrading the controller on another CNC Router and building 2 3D printers from scratch (One CoreXY and one like a Prusa I3 MKII) , including design ,hardware and electronics needs.
You can find the videos here
https://www.youtube.com/watch?v=40Qc8ZUZOJI
https://www.youtube.com/watch?v=XPqOh4Yi3WU
I have not posted the videos directly to Element14 as their sponsored by a different vendor and I dont want to upset people, but as far as helping fellow makers, it all about that 
I also have a bunch of videos on the making and upgrading of my first CNC Router (1500mm x 1500mm) here :- The Bull Dog, A RoverCNC OX based 1500mm x 1500mm CNC - Tutorial build | OpenBuilds
All the links are relevant to building motion control systems, hope you find them useful
