According to examples, an apparatus may include a build platform and a chamber. The chamber may support a layer forming station including a spreading component to spread a layer of build material particles onto the build platform and an agent delivery component to apply fusing agent onto selected locations on the spread layer of build material particles and a heating station including a heating component to apply energy onto the spread layer of build material particles and the applied fusing agent, in which the heating station is separated from the layer forming station. The apparatus may also include an actuator to move the chamber with respect to the build platform or vice versa while maintaining the separation between the layer forming station and the heating station.

A method of configuring an additive-manufacturing machine comprises a chamber , a platform, movable inside the chamber and comprising a build-plane surface, and a laser, having a laser focal plane within the chamber. The method comprising steps of flowing a gas within the chamber in accordance with a first set of process parameters and identifying a value of a flow characteristic of the gas at a predetermined point in the laser focal plane while flowing the gas within the chamber in accordance with the first set of process parameters. The method also comprises additively manufacturing a test coupon using the laser while flowing the gas within the chamber in accordance with the first set of process parameters , wherein the test coupon has a test-coupon peripheral surface.

A method of configuring an additive-manufacturing machine comprises a chamber , a platform, movable inside the chamber and comprising a build-plane surface, and a laser, having a laser focal plane within the chamber. The method comprising steps of flowing a gas within the chamber in accordance with a first set of process parameters and identifying a value of a flow characteristic of the gas at a predetermined point in the laser focal plane while flowing the gas within the chamber in accordance with the first set of process parameters. The method also comprises additively manufacturing a test coupon using the laser while flowing the gas within the chamber in accordance with the first set of process parameters , wherein the test coupon has a test-coupon peripheral surface.

A passivation device for passivating filter residues of a filter device arranged in a process gas circuit of an additive manufacturing apparatus includes a reaction unit having an inlet suitable for supplying an oxidant, a coupling unit adapted to be coupled to the filter device for introducing filter residues into the reaction unit, a discharge unit suitable for discharging passivated filter residues from the reaction unit, and an energy supply unit suitable for effecting a reaction between the filter residues and the oxidant in the reaction unit.

A directed energy deposition system and method including a set of nozzles for directing material, such in the form of a particle stream, at a part and a set of energy sources for generating a melt pool as the material contacts the part. The system further includes apparatus for generating a sound field that controls characteristics of the particle stream as it passes through the sound field.

A directed energy deposition system and method including a set of nozzles for directing material, such in the form of a particle stream, at a part and a set of energy sources for generating a melt pool as the material contacts the part. The system further includes apparatus for generating a sound field that controls characteristics of the particle stream as it passes through the sound field.

It is disclosed a printing system comprising: a print unit and an inertization unit; wherein the print unit is associated to a print chamber being the print chamber to receive print material from a source and the print unit to print the print material within the print chamber and wherein the inertization unit comprises a fuel-cell coupled to a fuel storage and an oxidant fluid input being the oxidant fluid input fluidly connected to the print chamber.

It is disclosed a printing system comprising: a print unit and an inertization unit; wherein the print unit is associated to a print chamber being the print chamber to receive print material from a source and the print unit to print the print material within the print chamber and wherein the inertization unit comprises a fuel-cell coupled to a fuel storage and an oxidant fluid input being the oxidant fluid input fluidly connected to the print chamber.

A method of forming a three-dimensional object includes providing a carrier and an optically transparent member having a build surface. The carrier and the build surface define a build region therebetween. The method further includes filling said build region with a polymerizable liquid; continuously or intermittently irradiating said build region with light through said optically transparent member to form a solid polymer from said polymerizable liquid; applying a reduced pressure and/or polymer inhibitor-enriched gas to the polymerizable liquid through the optically transparent member to thereby reduce a gas content of the polymerizable liquid; and continuously or intermittently advancing (e.g., sequentially or concurrently with said irradiating step) said carrier away from said build surface to form said three-dimensional object from said solid polymer.

A method of forming a three-dimensional object includes providing a carrier and an optically transparent member having a build surface. The carrier and the build surface define a build region therebetween. The method further includes filling said build region with a polymerizable liquid; continuously or intermittently irradiating said build region with light through said optically transparent member to form a solid polymer from said polymerizable liquid; applying a reduced pressure and/or polymer inhibitor-enriched gas to the polymerizable liquid through the optically transparent member to thereby reduce a gas content of the polymerizable liquid; and continuously or intermittently advancing (e.g., sequentially or concurrently with said irradiating step) said carrier away from said build surface to form said three-dimensional object from said solid polymer.