Hello,
I would be very glad if I could get any help. I would like to know if there is some way of controlling cnc shield v3 in real time through arduino from pc f.e I would push a button on a keyboard and the stepper would move in some direction or I would write a program that could tell the arduino in real time where to go. And I would like to controll 2 steppers at once. I know cnc shield is controlled with g-code but I think there could be some way. This is basis for my camera project. Camera would be creating some image, computer would compute coordinates and send that information to cnc shield through arduino in real time and the camera would move.
And if there isnt a way of controll in real time, what would be the biggest delay. In the future I would like to
replace my computer with raspberry-pi.
Thank you for your answers 
I found that universal gcode sender has options for controlling the movement of steppers(in real time)... I will try that UPDATE: Everything is working