When I click the auto home, the y axis moves all the way to the end stop switch. Stops, then I hear a loud beep for 5 seconds or so, then the axis moves all the way to the back and crashes into the back.
Sorry I have no idea. I assume you flashed a recent version of the BB firmware on the RUMBA? If you do not auto home did you check all the motors go the right direction when moving them with the LCD?
I have not, however, if I set the xsteps and ysteps both to 80. It homes the y super fast, then actually homes the x super fast, then crashes into the back super fast. I will check directions, but I'm fairly confident they are correct.
OMG I figured it out! new board has dip switches instead. it was set on a weird sequence. Fixed YAYAYAYA