Abstract: A method for providing control data for manufacturing at least one three-dimensional object by means of a layer-wise solidification of a building material in an additive manufacturing apparatus is provided. The method includes at least the following steps: a) determining the locations corresponding to the cross section of the at least one object, b) determining at least two different regions to be solidified in said at least one layer, wherein said at least two regions are chosen from the group of: sandwiched region, down-facing region and up-facing region, c) defining a scanning sequence for the beam so as to solidify the building material at least at the locations corresponding to said portion of the cross section of the object, wherein at an interface between a first and a second region differing from each other a scan line of the beam is continuous and at least one beam parameter value is changed.

Abstract: An additive manufacturing process includes applying a layer of a building material on a building support or an already applied and selectively solidified layer and selectively solidifying the applied layer by electromagnetic radiation or particle radiation. All positions in the layer that correspond to a cross-section of the object are scanned by electromagnetic radiation or particle radiation such that at these positions the powder is melted at least at its surface. At least one cross-section includes an inner region and a surface region. The step of applying a layer and the step of selectively solidifying the layer are repeated until all cross-sections of the object are solidified. At least a portion of the surface region is scanned at least twice before scanning of the inner region starts.

Abstract: A method for providing control data for manufacturing at least one three-dimensional object by means of a layer-wise solidification of a building material in an additive manufacturing apparatus is provided. The method includes at least the following steps: a) determining the locations corresponding to the cross section of the at least one object, b) determining at least two different regions to be solidified in said at least one layer, wherein said at least two regions are chosen from the group of: sandwiched region, down-facing region and up-facing region, c) defining a scanning sequence for the beam so as to solidify the building material at least at the locations corresponding to said portion of the cross section of the object, wherein at an interface between a first and a second region differing from each other a scan line of the beam is continuous and at least one beam parameter value is changed.

Abstract: Disclosed is a method for producing a three-dimensional object by layer-wise applying and selectively solidifying a building material. The method includes (a) applying a layer of the building material to a build area by means of an application device, (b) selectively solidifying the applied layer at positions that correspond to the cross-section of the object in the respective layer and at positions that correspond to the cross-section of an envelop region and (c) repeating the steps of applying and selectively solidifying until the object and the envelop region are completed. The envelop region encloses the object in at least a section thereof, wherein those positions that correspond to the envelop region are solidified less strongly than those positions that correspond to the three-dimensional object.

Abstract: A method for the production of a three-dimensional object (3) by layer-wise solidifying a building material (11) in powder form by means of electromagnetic radiation or particle radiation comprises a step of applying a layer of the building material (11) on a building support (2) or an already applied and selectively solidified layer and a step of selectively solidifying the applied layer by means of electromagnetic radiation or particle radiation, wherein all positions in the layer that correspond to a cross-section of the object (3) are scanned by electromagnetic radiation or particle radiation such that at these positions the powder is melted at least at its surface. At least one cross-section comprises an inner region (63) and a surface region (60).