In you video you show that the AR2 can move a distance back and forth.. left to right. Is there plans to add a second or their direction of travel for the rails? so that the AR2 could move left/right and forwards/backwards... or up/down up/down + left/right could be useful for example stocking or retrieving parts on a tall/wide shelf
To see this working, head to your live site.
I dont have any active plans to add more axis for travel but thats something I could do in the future. right now im focusing on the next larger closed loop robot. after that there are a number of updates such as this one I may work on..
Do the current electronics support an extra stepper motor?
The Arduino does have additional output pins that could be programmed to control another track. It would just be a matter of programmin then in the sketch and the AR2 software.