Do you have three motorized (servo) axis right now? If so you have the motors and amps.
You would need to know however what type of control the amps have analogue/step&dir?
Is there steppers or servo motors.
I assume it is just point to point positioning at present and you want to do interpolated motion?
Depending on the above, You may just need the software.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.