I am CNC'ing a mill for the first time, and today I did very basic research on what contactors, breakers and EMI filters were. I was just hoping someone could link me to some good basic CNC schematics, especially those which use single phase mains power for servos like mine will.

It seems there are a number of ways to set up the on off switches and e-stops with contactors. BTW, are contactors basically glorified on off switches, is that there purpose? + they provide surge protection with some basic addons.
Also should I use my 24V control voltage to activate the contactors? Seems simpler to just wire up the mains which will supply my servos to also run through a swittch connected to the contactors.
Should I possibly be using relays instead of contactors since my servos are 3A nominal current 240V, I will probably be using them at 50% capacity mostly?

Breakers seem pretty straightforward in that they stop fires from too much current

Any advice appreciated. Thanks.

PS My box will get a look over from an electrician friend once it's designed.