Motion system was working perfectly. Then at some point head suddenly crashes into back wall. Cut power and then noticed after an auto-home nozzle was forward of the centre. If - using Rumba knob - I move the print head forward manually it goes perfectly to Y=0; but if I move it backwards, it will move beyond Y=200: near the ooze bucket I've been able to go as high as y=237 The level bed command works OK and goes to a max Y=157mm After an auto-home X=150 but Y=68, every time. What is going on? And for a while there were "Err: too far!" errors displaying after running commands.