Laser center dependent exposure strategy

A method for controlling an energy input device of an additive manufacturing device for manufacturing a three-dimensional object using the additive manufacturing device, wherein the object is manufactured by applying a building material in layers and solidifying the building material in a build plane using the energy input device by supplying radiant energy to solidification points in each of the layers which are assigned to a cross-section of the object, and by scanning the solidification points with beam bundles provided by the energy input device along trajectories in the build plane, the method comprising:

• assigning beam bundle deflection centers to the beam bundles above the build plane from which a beam bundle is directed onto the build plane;
• assigning a projection center to each of the beam bundle deflection centers that corresponds to a perpendicular projection of a position of the beam bundle deflection center onto the build plane;
• and
• defining, at least in a section of an object cross-section, the directions of movement vectors of the beam bundles when scanning the trajectories such that, at each solidification point in the section, the movement vector forms an angle with a connection vector from the solidification point to the projection center of the beam bundle used, the angle being smaller than a predetermined maximum angle.

A method for controlling an energy input device of an additive manufacturing device for manufacturing a three-dimensional object using the additive manufacturing device, wherein the object is manufactured by applying a building material in layers and solidifying the building material in a build plane using the energy input device by supplying radiant energy to solidification points in each of the layers which are assigned to a cross-section of the object, and by scanning the solidification points with beam bundles provided by the energy input device along trajectories in the build plane, the method comprising:

• assigning beam bundle deflection centers to the beam bundles above the build plane from which a beam bundle is directed onto the build plane;
• assigning a projection center to each of the beam bundle deflection centers that corresponds to a perpendicular projection of a position of the beam bundle deflection center onto the build plane;
• solidifying at least one section of the cross-section, sub-area by sub-area;
• defining, in at least one of the sub-areas whose solidification points are scanned with a beam bundle assigned to the sub-area, an order of scanning of the trajectories such that trajectories located closer to the projection center of the beam bundle are scanned before trajectories located further away from the projection center;
• and
• solidifying, in at least one section of an object cross-section, the section sub-area by sub-area, wherein a chronological order of scanning of sub-areas whose solidification points are scanned with a beam bundle assigned to the sub-areas is defined such that sub-areas located closer to the projection center of the beam bundle are scanned before sub-areas located farther away from the projection center.