Been printing fine for several hours with my bigbox pro. But today when I started a print I noticed nozzle was way to high. So I adjusted Z-offset as normal. But nothing happens, it doesn't do anything anymore. I can see it runs its 4 corner probing, and then prints. But it's still in the same height. Anyone got some ideas what to check? The sensor looks to be working, cause it does stop before hitting bed when doing it's autolevel procedure.
I wish I had an answer for you, but I had the exact same issue. After about a month of trying to figure it out and reflashing the board countless times, I gave up. I bought a DuetWifi and am in the final stages of calibrating. Since mine is fine on the Duet without a sensor change, I have to assume it is some odd issue with the Rumba.