Abstract: A method for producing an object by additive manufacturing including receiving in a process chamber a bath of material wherein a surface level of the bath of material defines an object working area, solidifying by a solidifying device a selective layer-part of the material on the surface level, and controlled oxidisation, of waste particles originating from the solidifying of the material, by controlling an oxygen level, such that oxidised waste particles are obtained and ignition of the waste particles is avoided. An apparatus for producing an objet by additive manufacturing.

Abstract: An apparatus for producing an object by additive manufacturing layer by layer in a layer sequence. The apparatus includes a process chamber for receiving a bath of powdered material, a support for positioning the object in relation to a surface level of the bath of powdered material, a solidifying device for solidifying a selective layer-part of the powdered material, and a control unit for adjusting for individual layers in the layer sequence, a setting of at least one process parameter, during the manufacture of the object. A method, performed by the apparatus, including the step of adjusting, by the control unit, for individual layers in the layer sequence, the setting of at least one process parameter, during the manufacture of the object.

Abstract: Method for producing an object by means of additive manufacturing, wherein said method comprises the steps of: receiving, in a process chamber, a bath of material, wherein a surface level of said bath of material defines an object working area; solidifying, by a solidifying device, a selective layer-part of said material on said surface level; controlled oxidisation, of waste particles originating from said solidifying of said material, by controlling an oxygen level, such that oxidised waste particles are obtained and ignition of said waste particles is avoided. Apparatus for producing an object by means of additive manufacturing.

Abstract: A method for calibrating an apparatus for producing an object by additive manufacturing, the apparatus including a process chamber for receiving a bath of material to be solidified by exposure to electromagnetic radiation, a support for positioning the object in relation to the surface level of the bath of material, and a solidifying device for solidifying a selective layer-part of the material on the surface level by electromagnetic radiation, the method including controlling the solidifying device to make a first test mark at a first delay setting, controlling the solidifying device to make a second test mark at a second delay setting different from the first delay setting, and determining a delay setting based on at least the first test mark and the second test mark.

Abstract: A method for calibrating an apparatus for producing an object by means of additive manufacturing including a process chamber for receiving a bath of material which can be solidified by exposure to electromagnetic radiation, a support for positioning the object in relation to the surface level of the bath of material, and a solidifying device for solidifying a selective layer-part of the material on the surface level by means of electromagnetic radiation. A method including providing, on or near the support, a calibration marker that faces the solidifying device, and providing a calibration system with an imaging unit that can be directed to the support.

Abstract: The invention relates to an apparatus for producing an object by means of additive manufacturing, comprising a process chamber for receiving a bath of material which can be solidified by exposure to electromagnetic radiation; a support for positioning the object in relation to the surface level of the bath of material; and a solidifying device for solidifying a selective layer-part of the material on the surface level by means of electromagnetic radiation. Furthermore optical control device is provided with a focus unit in an optical pathway of the electromagnetic radiation of the solidifying device, and arranged for controlling at least the focus of the electromagnetic radiation emitted by the solidifying device on the surface level. According to the invention, the optical control device comprises a sensor element arranged for detecting a measure for the accuracy of the focus of the electromagnetic radiation and a focus correction lens element that is arranged to be movable.

Abstract: The invention relates to a method for manufacturing an object from a material by means of additive manufacturing using a plurality of solidifying devices for solidifying said material in stacked layers by means of electromagnetic radiation. Said method comprises the step of defining, by a data processing unit, at least two solidifying device allocations. In each of said solidifying device allocations said plurality of solidifying devices are allocated to respective parts of said layer such that said parts cover said layer.

Abstract: A system for producing an object by means of additive manufacturing including an apparatus, having a storage container for storing powdered material that can be solidified, and a process chamber fluidly connected to the storage container and arranged for receiving at least a part of the powdered material for forming a bath of material within the process chamber. Furthermore, a structure is provided for positioning the object in relation to the surface level of the bath of material. The apparatus also includes a solidifying device for solidifying a layer of the bath of material. A supply device is provided, having a supply container for storing a supply of powdered material that can be solidified, wherein the supply device is fluidly connected, or at least connectable, to the storage container, and wherein the apparatus is arranged for transferring powdered material between the supply container and the storage container.

Abstract: An apparatus for producing an object by additive manufacturing including a chamber for receiving a bath of material solidified by exposure to electromagnetic radiation, a support for positioning the object, and a solidifying device for solidifying a layer of the material. A registering device registers a characteristic of a calibration area related to the surface level of the bath of material and a control unit utilizes the characteristic to control the position of the emitted electromagnetic radiation.

Abstract: The invention relates to a method for calibrating an apparatus for producing an object by means of additive manufacturing. The apparatus comprises a process chamber, as well as a support for positioning the object in relation to a surface level of a bath of material to be solidified. A solidifying device is arranged for emitting a beam of radiation on the surface level for solidifying a selective part of said material. The solidifying device comprises a focus member for adjusting a focus setting. The method according to the invention comprises the steps of controlling the solidifying device for making test patterns at different focus settings. A calibration system with a sensor unit is used for determining characteristics of test patterns, and a calibrated focus setting is determined based on the characteristics.

Abstract: Apparatus for producing an object by means of additive manufacturing, comprising: a process chamber for receiving on a build surface of a build plate a bath of powdered material which can be solidified; a support for supporting on a supporting surface thereof said build plate in relation to a surface level of said bath of powdered material, wherein said build plate is removably connectable to said supporting surface; a solidifying device for solidifying a selective part of said material by emitting electromagnetic radiation; and a build plate takeover device comprising an actuating element for placing said build plate onto said supporting surface of said support for producing said object and removing said build plate from said supporting surface of said support. Method for producing an object by means of additive manufacturing.

Abstract: An apparatus for producing an object by additive manufacturing layer by layer in a layer sequence. The apparatus includes a process chamber for receiving a bath of powdered material, a support for positioning the object in relation to a surface level of the bath of powdered material, a solidifying device for solidifying a selective layer-part of the powdered material, and a control unit for adjusting for individual layers in the layer sequence, a setting of at least one process parameter, during the manufacture of the object. A method, performed by the apparatus, including the step of adjusting, by the control unit, for individual layers in the layer sequence, the setting of at least one process parameter, during the manufacture of the object.

Abstract: Apparatus for producing an object by means of additive manufacturing, including a process chamber for receiving on a build surface of a build plate a bath of powdered material which can be solidified, a support for positioning the build plate in relation to a surface level of the bath of material, a solidifying device for solidifying a selective part of the material; and a build plate preparation means for preparation of the build surface of the build plate such that the object can be build on the build surface of the build plate. Method of producing an object by means of additive manufacturing on a build surface of a build plate using such an apparatus.

Abstract: Method for producing an object by means of additive manufacturing, wherein said method comprises the steps of: receiving, in a process chamber, a bath of material, wherein a surface level of said bath of material defines an object working area; solidifying, by a solidifying device, a selective layer-part of said material on said surface level; controlled oxidisation, of waste particles originating from said solidifying of said material, by controlling an oxygen level, such that oxidised waste particles are obtained and ignition of said waste particles is avoided. Apparatus for producing an object by means of additive manufacturing.

Abstract: Apparatus for producing an object by means of additive manufacturing, comprising: a process chamber for receiving on a build surface of a build plate a bath of powdered material which can be solidified; a support for positioning said build plate in relation to a surface level of said bath of powdered material; a solidifying device for solidifying a selective part of said material; and a homing device for moving said build surface, by said support, to a home position such that said object can be build on said build surface of said build plate, wherein said homing device comprises a homing member which can be displaced along said build surface of said build plate, wherein said homing device is designed for moving said build surface to said home position until a measured force for displacing said homing member is within a pre-determined range. Method for producing an object by means of additive manufacturing.

Abstract: Apparatus for producing an object by means of additive manufacturing, including a process chamber for receiving on a build surface of a build plate a bath of powdered material which can be solidified, a support for positioning the build plate in relation to a surface level of the bath of material, a solidifying device for solidifying a selective part of the material; and a build plate preparation means for preparation of the build surface of the build plate such that the object can be build on the build surface of the build plate. Method of producing an object by means of additive manufacturing on a build surface of a build plate using such an apparatus.