I spent days trying to use the full print area. Never managed to print 30×30!!!
I printed exclusively from the SD card.
Only after I moved the printer to another room so I could connect it directly via USB did it work.
So the full print area of 30x30cm is ONLY possible via US.
I assume that this is a bug?
I am skeptical that there is a bug or that there really is something odd about the SD card. It should not make any difference where the gcode comes from. I wonder if there was a difference in how you sliced the print.
in one way I say ..print in the other..write to Sd Card. no difference