updated tray calibration. cancel if 6+ consecutive centerings fail #891
updated tray calibration. cancel if 6+ consecutive centerings fail #891

USGSDenverPychron/pychron,NMGRL/pychron,USGSDenverPychron/pychron,UManPychron/pychron,UManPychron/pychron,NMGRL/pychron,UManPychron/pychron,NMGRL/pychron,USGSDenverPychron/pychron,NMGRL/pychron,UManPychron/pychron,USGSDenverPychron/pychron