Its not just the moving the table the steppers have to deal with its the cutting force as well, plus the acceleration of the mass and stopping it...I'd have thought that servos would be best but 8 & 12Nm Nema 34 steppers coupled with 230V drives should see you right.

Don't be tempted with kits of electronics, they're seldom well matched. Zapp Automation, CNC4YOU are good for steppers etc.

What's the all important budget?

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