Yeap, it's on paper! 

Here I show the main parts about the internal work flow.

The original idea was using a Kinnect sensor(Xbox 360) to make a point cloud but it's demmand a hard processing time. So, to do the simple, I changed this to a own laser scanner. 
How it's run:
The IR(Sharp sensor) beam will be reflected on a rotating(stepper motor) dielectric mirror. The result is a meassure X,Y on 360º.

Therefore, I have to solve the problema in Z axis. Maybe I use a servo motor or other stepper motor to control up and down on the hole.