Nema 17 stepper motors ?

[gd485]

I agree Nema 17 are more suited to laser engraving or 3d printer. Any cnc machine that uses a cutter needs a lot more power to overcome the cutting forces. As you are cutting wood you could use relatively high cutting speeds. So to reduce the chance of missing steps I’d suggest Nema 23/24. Use a power supply near to the max the drivers limit. This will improve high speed torque. Remember the stepper motor torque falls off a cliff around 500rpm. So choice of lead screw pitch along with the 500rpm limit creates the maximum cutting speed.
Routers need to be quite rigid and therefore heavy, the acceleration rate is critical in preventing missing steps. The best solution t is to buy the most powerful motors you can fit into you design. Too much power won’t cause as many problems as too little. I hope that helps.