Dear JohnstoneThis is the reply I got from our robot engineer:Note: Not all of the signals are necessary to apply for reliable interface discussion.Most important is to prevent unwanted actions to happen during production, for example the chuck operations would be good to isolate from robot when actions are denied, either by physical relay or by PMC.Also even if the chuck don’t have sensor feedback it would be good if it is possible to send robot information that requested command has been taken in action, after feedback is received the robot can wait desired time before continuing movements. From Robot to CNC: