If I buy servo motor, what's the range of the voltage, amp, etc ?

does the biggest servo motor (no gearbox) is more than enough to drive big CNC say 2x3 meter travel cutting alumunium plate 2 mm thick ?

what do you recommend Servo motor brand ? high torque and heavy duty is what i'm looking for. beside reasonable price ?

what's the specification choosing servo motor for gecko drive ? and what Not to buy which is not compatible ?

reagards
rud