Quote Originally Posted by m_c View Post
The ATC isn't that much of a problem. At the basic level, it's just 4 inputs and 3 outputs.
The far bigger problem are the home sensors, as for most controllers you need to change them to newer NPN/PNP type, but I'm sure if you know a bit electronics, you could make up an interface board to convert the NAMUR signal to something more usable.
Plus you need a controller capable of handling the 24V logic, unless you want to drop all the controls to 5V (I really wouldn't recommend that option!).
And just for good measure the carousel index sensor is 5V (I swapped mine to a 24V version).
My contacts are all normal mechanical ones, I wonder why they are different.

For my ATC, I dont count anything. I worked out that 1 revolution of the wheel takes exactly 1 second, so I just pulse as long as is needed. Not perfect but its never let me down.