Method and device system for removing material or for working material

The method of 1 further comprising:

• determining a geometrical model of the removed material from the object using at least one of effective geometry, cut geometry, difference geometry and a 3-D surface scanner;
• storing the geometrical model;
• and
• using the geometrical model for removal of material from at least one of the object, another object and a model, wherein the use of the geometrical model includes mirror-imaging a positive geometry of a cut out from the object into a negative geometry.

A system for at least one of removing and processing material comprising:

• at least one effector defining a volume and having a predetermined geometry coupled to a handpiece and operable to be manually guided in relation to an object to remove material from the object;
• a navigation system for determining position and orientation of the effector as the effector removes material from the object;
• a control unit coupled to the handpiece and the navigation system;
• a first marker support with first markers arranged on the handpiece and detectable by the navigation system;
• a second marker support for securing to the object and including second markers detectable by the navigation;
• and
• wherein the control unit supplies at least one of power and parameterization control commands to the effector as a function of at least one of a predetermined work volume for the object, volume of the material removed from the object and volume of residual material in the work volume, and wherein the control unit determines the removed material volume and the residual material volume based on the volume and the geometry of the effector and data representative of the position and orientation of the effector as the effector removes the material from the object.