If the Z-offset is not correctly set on a 3D printer with two print heads, it can lead to problems because the two nozzles may not have the correct distance to the print surface. In practice, this means that one nozzle may be too close to the surface while the other is too far away. This results in inconsistent layer heights and significantly affects print quality. It can lead to adhesion problems and there could even be collisions between the nozzles and the printed object. It is crucial to ensure that both nozzles have the correct distance to the print surface. Other possible reasons for poor adhesion are: too low print or/and plate temperature or too high printing speed in the interface.