So my machine has GE Fanuc AC Servo motors, I need to find something with the same type motor?
No install tech here. . . Just me trying to get my machine setup. Tired of using my Cincinnati dividing head. Hoping to find a 4th, even if it's just for positioning that is slimmer.
Come up with the numbers on your servo drive (velocity control unit) that will run the fourth axis... That will tell you what type of servo you can run.
It should be a number that looks something like this: A06B-6050-H102
There's a Fanuc chart that shows which VCU pairs with which servos...
I have some pin-outs and other stuff for AC servos that I had to come up with during my retro-fit.
There are other issues to contend with as well including:
1) The gear ratio of the rotary table vs the encoder on the servo and the corresponding CMR/DMR parameters.
2) The "polarity" of the brake (Is the brake hot to apply or hot to release).
3) The "polarity" of the brake confirmation signal (Is the signal hot when brake is applied, or hot when brake is released).
4) The setting for the homing dog. (They're adjustable, but must be on the correct "side" of the limit switch depending on +/- rotation direction).
5) The pulse coder cable has two wires that can be flipped for reverse rotation units. (Wiring must match your +/- rotation direction).
For example, 2) and 3) are coded into the ladder... Most good tables have Lego parts that can be switched out to match your ladder.
In my case, I had the wrong brake polarity, so I had to purchase a different SMC solenoid-valve for my Nikken table.
I recommend buying the cables. I built my own and will share the pin-outs, but there are used cables all over e-bay and from other sources.