updated machine page

docs/machine_design.md

@@ -223,3 +223,15 @@ We started talking about how the design of the parts should look like, how they
 After we agreed on a design we could start 3D printing, laser cutting and testing the parts, like this belt clamp:
 
 ![](https://i.imgur.com/q08zpHA.jpg)
+
+## Interface
+
+We decided to create a simple interface to control the machine. As we didn't have much time, we used Processing to control the motion of the two axis, but we also need the Skanect program to control the Kinect, those 2 functionalities could be join in the future.
+
+This interface is really simple, it only let you adjust the parameters and the movements of the machine. Here you can see how it looks like:
+
+![](https://i.imgur.com/V7dnBsA.png)
+
+As you can see, you can adjust the Rotation speed, the vertical Speed, the Maximum Height that will be a percentage of the whole lenght and then the motion. To control the motion you have to options, to move the Z axis more than once while the base rotate one time, or rotate the base multiple times in one single vertical movement.
+
+The default values are settet up, and the limits are set up too.