I am a complete newbie, I want to make a CNC for PCB making purposes, can I use these electronics
1. 2.6kg.cm Nema 17 stepper motor (CNC NEMA 17 Stepper Motor 5V 1 2A 2 Phase 4 Wire 2 6kg cm 1 8 Degree 3D Printer | eBay)
2. Polulu driver (1pcs A4988 Stepper Driver Module Polulu Compatible for RepRap Prusa Mendel M6 | eBay)
3. USB CNC Driver (4 Axis USB CNC Controller Cncusb Usbcnc CNC USB Alternative Mach3 Usbcnc 2 1 GE | eBay)

I want to make something small like whiteAnt.

And one extra question, I have seen buildyourcnc.com to use Belt and Pulley instead of Screw and Nut in many CNC machines, is that advantageous and reduce backlash error?

I am a computer science engineer and have a little less knowledge in mechanics so please consider if any silly questions are made.

-Thanks