Need advice for ac sero controller

[Leslie39]

Hello All,
This is my first posting, so bear with me.
I am considering switching my home built cnc mill over to ac servo's.
I have 4 yaskawa 200w servos.
Does anyone have any advice on which controller to use for these servo's.
I am running Mach3 w/steppers at the present time.
Over-all its not that bad of a setup, but I would like to have my servo's
on the machine, mainly for accruacy.

Thanks,

Les

P.S. I have included a picture of my cnc also.