A system for docking a platform adapted to carry a manipulator, in relation to a workstation. The system comprises a plurality of protruding members attached to the platform, a docking station arranged at the workstation and comprising a plurality of recesses adapted to receive the protruding members for positioning the platform relative the workstation. Each of the recesses comprises a positioning section defining a space and a supporting section tapering towards the positioning section and having at least one support surface, and the protruding members are protruding away from a bottom surface of the platform, and an outer end of each of the protruding members comprises a positioning portion designed to at least partly fit in said space, and a bearing portion tapering towards the positioning portion and having a bearing surface adapted to bear on the support surface when the positioning portion is fitted in said space.