Plotter CNC con unidad de CD o DVD vieja arduino puente h y un servo pequeño

http://www.instructables.com/id/Arduino-Mini-CNC-Plotter-Machine-from-dvd-drives/

Arduino Mini CNC Plotter Machine from dvd drives

In this project I will show you how to easily build your own low-cost Arduino Mini CNC Plotter!
This project is an update from my previous cnc, with better construction and with more accuracy.
I decided to make this detailed guide to help you make it on a few easy steps.
Small description:
For the X and Y axes we will use two stepper motors and rails from dvd/cd drives and for the Z axis we will use a small servo motor that moves the pen up and down. For the mounting base we will use a small piece of plexiglass.
You can easily attach a pen (or pencil) - irrespective of its thickness - on it. I tried to use an extension of cutting tool (e.g.Dremel) to engrave materials with no success. So this mini cnc can only be used as a small plotter and not as an engraver machine.
The Arduino-based circuit is using the ATmega328 microcontroller, two L293 motor driver ICs and an usb to serial module. You can easily make it with the Arduino uno board and an breadboard.