i am currently in my third year at UMIST, on the Mechanical Engineering (MEng) course. I am designing a control system for a miniaturised CNC lathe for my 3rd year project. For integration between the computer and actuators, i am planning on using Labview 7, but am currently having problems learning how to utilise the PID control toolset to create a virtual system response. I am planning on being able to input a specific transfer function for, say, a DC motor, and a ramp input, for example, and being able to view the output response as i vary the P, I and D gains. Some help with regards to the block diagram set-up for such a system would be greatly appreciated.