A method and a 3D guiding system for providing a guided relative movement of a first object and a second object are disclosed. The 3D guiding system comprises a 3D scanner configured for performing a 3D scanning of the second object, and a non-transitory computer-readable medium configured for at least temporary storing: a 3D model of the second object； program code for determining a present relative arrangement of the first and second objects from a result of a 3D scanning of the second object； and program code for calculating information for guiding the relative movement of the first and second objects towards said first preferred relative arrangement from said present relative arrangement.
