3D Printer Print Bed Boundaries

This is the authoritative answer on how to set up bed geometry for a 3D printer. This includes bed offset after homing, probe offset from extruder, and probe edge. Wonderful explanation with pictures:

https://3dprinting.stackexchange.com/questions/8153/how-to-set-z-probe-boundary-limits-in-firmware-when-using-automatic-bed-leveling