Ok, now I'm kinda annoyed. I just plugged a raspberry pi into the 3d printer. Octipi started up and I was able to control it and view the print via the camera. I was all impressed.
Until I turned off the printer and then turned it back on. Now my raspberry pi is dead. wtf?
Maybe I need to hook up my power supply to my oscilloscope and see if it's throwing really dirty power along the rails. Whatever's going on, it's getting expensive. At least it didn't short out the rumba board again...