Is it possible to change the artboard origins to always be 0,0 (top left corner), and not relative to the first artboard in a document?
DayForce has the answer. if you have not changed the orientation then you only have to select thartboard you wish by clicking in it or select art on it and the rulers change to orient themselves to the artboard.
Notice as the artboards are selected the 0 position chages to reflect that selection
Make sure you do not have Global Rulers checked