Auto_Bed_Leveling: Enhanced G29 command

[AbuMaia]

Yes. Y axis homes, gets set to 0, then while Z axis moves before extending the probe, Y axis also moves, about 10mm, but stays set at 0. So Y axis coordinates are offset by 10mm after a G28, before G29. That's why, when doing the last row of levelling probes during a G29, the probe is right on the edge of the glass (197mm) while the LCD reports it at 187mm.