A surgical robot system for cutting bone, the surgical robot system comprising:a surgical robot having an end effectora cutter attached to the end effectorposition determining means for determining the position of a bone which is to be cut vis-à-vis the surgical robotpre-plan means for storing a pre-planned cut of the bone and instructing the surgical robot to cut bone in accordance with the samea display for displaying the pre-planned cut of the bone andinput means for enabling a user to deactivate the pre-plan means and to enable manual control of the cutter by the user.
