After getting my pick and place robot working, it was a real pain converting it over to 3D printer operation. Switching back from 3D printer mode back to pick and place robot was an even bigger chore since I would have to re-align the cameras and calibrate the offsets. When I was using the pick and place I really missed the utility of being able to quickly print simple parts out of plastic.
For a while I considered buying an off the shelf 3D printer like the Printrbot simple metal but decided that for the same amount of money I could build my own with all the features I wanted. I really like the Prusa i3 design and probably would have built one if I hadn’t come across this site describing the coreXY design. Below is a video of what I came up with: