The Z offset value that is stored in the eeprom will over ride your updates in the config.h
You can use the built in eeprom editor in repetier host to update the z offset (marlin uses a negative value here, so -18.6)
or you can send the following comands to the printer to update the eeprom with the settings in config.h
M502 ;read config.h values
M500 ;store values to eeprom
You can use the built in eeprom editor in repetier host to update the z offset (marlin uses a negative value here, so -18.6)
or you can send the following comands to the printer to update the eeprom with the settings in config.h
M502 ;read config.h values
M500 ;store values to eeprom