Omron 500W AC Servo driver for robot setup

I have a 6 axis welding robot that I want to use for a plasma cutter application. I have a little knowledge with cnc using a stepping motor but none about how to run ac servo motors or how to use G code and make this unit work. All I have is the robot arm. No control box or anything to run the motors with. I have removed the miller mig welding attachment and now need a idea of what drives I can use to run these ac servo motors.

2 of the motors are as follows:

W-L00180 FMA-50030-B0S1 500 W 3000 Rpm Omron Tateisi Electronics

S/N 111382


Any info would be great. jj. Fort Worth Texas