The INKREDIBLE+ system must be homed each time it is turned on prior to the start of printing. This will position the printhead at the stored ‘zero position’ and all movements will be relative to this position. The nozzle must then be calibrated to the surface to account for differences in the nozzle length or print surface height between experiments.  


The offset between the two printheads can also be calibrated and can be reset under the advanced options menu within the utilities menu. A detailed guide for this process can be found here: https://cellink.freshdesk.com/support/solutions/articles/35000060910-how-to-calibrate-the-printhead-offset 


Please see knowledge articles and videos on how to do this and contact support@cellink.com for any questions.