In a method of operating an irradiation system (10) for irradiating layers of a raw material powder with electromagnetic or particle radiation in order to produce a three-dimensional work piece (110) it is determined whether a region of a raw material powder layer (11) to be selectively irradiated with electromagnetic or particle radiation in accordance with a geometry of a corresponding layer of the work piece (110) to be produced is affected or substantially unaffected by particulate impurities. Upon selectively irradiating the region of the raw material powder layer (11) with electromagnetic or particle radiation, an energy density applied to the region of the raw material powder layer (11) by a radiation beam (14a, 14b) is controlled in such a manner that the energy density is higher in case it is determined that the region of the raw material powder layer (11) is affected by particulate impurities than in case it is determined that the region of the raw material powder layer (11) is substantially unaffected by particulate impurities.

An additive manufacturing method using an inkjet printhead supplied with a binder fluid, said method comprising the steps of: (a) providing a layer of powdered build material including a monomer; (b) selectively jetting the binder fluid onto predetermined regions of the layer of powdered build material, the binder fluid comprising a catalyst; (c) optionally exposing the layer of powdered build material to an energy source to initiate polymerization of the monomer; and (d) optionally repeating steps (a) to (c).

An additive manufacturing method using an inkjet printhead supplied with a binder fluid, said method comprising the steps of: (a) providing a layer of powdered build material including a monomer; (b) selectively jetting the binder fluid onto predetermined regions of the layer of powdered build material, the binder fluid comprising a catalyst; (c) optionally exposing the layer of powdered build material to an energy source to initiate polymerization of the monomer; and (d) optionally repeating steps (a) to (c).

Methods of additively manufacturing a manufactured component and systems that perform the methods. The methods include determining an energy application parameter at an addition location on a previously formed portion of the manufactured component. The methods also include supplying a feedstock material to the addition location. The methods further include delivering, from an energy source and to the addition location, an amount of energy sufficient to form a melt pool of the feedstock material at the addition location. The amount of energy is based, at least in part, on the energy application parameter. The methods also include consolidating the melt pool with a previously formed portion to form an additional portion of the manufactured component. The delivering includes delivering the amount of energy to the addition location along an axis of incidence, and the energy application parameter includes a directionality parameter that is based on the axis of incidence.

Methods of additively manufacturing a manufactured component and systems that perform the methods. The methods include determining an energy application parameter at an addition location on a previously formed portion of the manufactured component. The methods also include supplying a feedstock material to the addition location. The methods further include delivering, from an energy source and to the addition location, an amount of energy sufficient to form a melt pool of the feedstock material at the addition location. The amount of energy is based, at least in part, on the energy application parameter. The methods also include consolidating the melt pool with a previously formed portion to form an additional portion of the manufactured component. The delivering includes delivering the amount of energy to the addition location along an axis of incidence, and the energy application parameter includes a directionality parameter that is based on the axis of incidence.

An additive manufacturing system includes a high power laser to form a laser beam directed against a light valve. An active light valve cooling system is arranged to remove heat from the light valve and a heat exchanger is connected to the active light valve cooling system. A heat exchange fluid is circulated through the active light valve cooling system and the heat exchanger.

An additive manufacturing system includes a high power laser to form a laser beam directed against a light valve. An active light valve cooling system is arranged to remove heat from the light valve and a heat exchanger is connected to the active light valve cooling system. A heat exchange fluid is circulated through the active light valve cooling system and the heat exchanger.

According to an example, a heating device comprises a plurality of light emitting arrays to emit a respective irradiance associated with a calibration profile and a power source electrically connected to the plurality of light emitting arrays, wherein the irradiances emitted by the plurality of light emitting arrays result in a substantially spatially uniform irradiance towards a target surface.

According to an example, a heating device comprises a plurality of light emitting arrays to emit a respective irradiance associated with a calibration profile and a power source electrically connected to the plurality of light emitting arrays, wherein the irradiances emitted by the plurality of light emitting arrays result in a substantially spatially uniform irradiance towards a target surface.

A gas manifold for single-nozzle deposition chambers comprising a base having a top surface and bottom surface defining a thickness; a primary nozzle having an inlet and outlet extending through the thickness of the base; and a secondary nozzle having an inlet extending partially through the top surface of the base and at least one channel extending a distance from a sidewall of the base having an outlet, the channel in fluid communication with the inlet of the secondary nozzle. The inlet of the primary nozzle has a hollow protrusion extending from the top surface of the base into the gas feed. The channel of the secondary nozzle includes a bend between the sidewall of the base and the outlet configured to pass between a first direct energy source and second direct energy source, the first energy source and second energy source disposed on a top wall of a chamber.