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Having a strange bed issue, wondering if you had them too...
I have expanded my bed to almost the same size you have here, and inside of sure I updated the printr setting to include the new dimensions but when I print the machine still tries to print within the original boundaries. When I make print, if it goes outside of the old settings in just moves back and forth on the Y dimension, extruding throughout. I have tried re-flashing and still nothing. Same problem on the Y axis. Cant find anything in the forums either. Any ideas?