A powder dispensing assembly for an additive manufacturing machine is provided. The powder dispensing assembly includes a housing that defines a powder reservoir that receives additive powder; a first plate removably connectable to the housing, the first plate defining a first discharge orifice having a first discharge orifice geometry; and a second plate removably connectable to the housing, the second plate defining a second discharge orifice having a second discharge orifice geometry different than the first discharge orifice geometry, wherein with the first plate connected to the housing, the additive powder flows out of the first discharge orifice at a first dosing rate, and wherein with the second plate connected to the housing, the additive powder flows out of the second discharge orifice at a second dosing rate different than the first dosing rate.

An additive manufacturing machine is provided. The additive manufacturing machine includes a build unit including a powder dispenser assembly defining a powder reservoir that receives additive powder; a dosing rate measurement device in communication with the powder dispenser assembly, wherein the dosing rate measurement device measures a dosing rate of the additive powder in-situ; and a controllable device operably coupled to the build unit and including one or more processors configured to execute a program to cause the controllable device to adjust the dosing rate of the additive powder based on the dosing rate measured by the dosing rate measurement device.

An additive manufacturing machine is provided. The additive manufacturing machine includes a build unit including a powder dispenser assembly defining a powder reservoir that receives additive powder; a dosing rate measurement device in communication with the powder dispenser assembly, wherein the dosing rate measurement device measures a dosing rate of the additive powder in-situ; and a controllable device operably coupled to the build unit and including one or more processors configured to execute a program to cause the controllable device to adjust the dosing rate of the additive powder based on the dosing rate measured by the dosing rate measurement device.

An additive manufacturing machine having a build vessel defining a work surface is provided. The additive manufacturing machine includes a build unit including a powder dispenser assembly defining a powder reservoir that receives additive powder; a positioning system adapted to provide independent movement of at least one of the build unit and the work surface with respect to one another in at least two dimensions; and a dosing rate measurement device in communication with the powder dispenser assembly, wherein the dosing rate measurement device measures a dosing rate of the additive powder in-situ.

An additive manufacturing machine having a build vessel defining a work surface is provided. The additive manufacturing machine includes a build unit including a powder dispenser assembly defining a powder reservoir that receives additive powder; a positioning system adapted to provide independent movement of at least one of the build unit and the work surface with respect to one another in at least two dimensions; and a dosing rate measurement device in communication with the powder dispenser assembly, wherein the dosing rate measurement device measures a dosing rate of the additive powder in-situ.

An antenna device is disclosed, including a cavity structure having a floor portion and a perimeter wall portion connected to the floor portion. A dipole structure extends upward from a center region of the floor portion inside the cavity structure. At least one of the wall portion and the dipole structure has an opening small enough relative to an expected radio frequency wavelength to avoid affecting antenna performance.

Devices, systems, and methods for monitoring a powder layer in additive manufacturing are disclosed. A method of monitoring a powder layer includes receiving image data corresponding the powder layer supported by a powder bed within a build chamber from imaging devices, determining leading and trailing regions of interest located adjacent to a leading end and a trailing end of the moving powder distributor, respectively, the leading and trailing regions of interest moving according to movement of the moving powder distributor, selecting at least one point located in the leading region of interest from the image data, determining first characteristics of the point, when the point is located within the trailing region of interest, determining second characteristics of the point, and comparing the first characteristics to the second characteristics.

A supply module (2) for supplying additive manufacturing powder comprises: a main hopper (29) for storing additive manufacturing powder, the main hopper (29) being designed to be connected to a manufacturing module (4) configured to additively manufacture an object from the powder; an inlet (211) of the supply module (2) designed to be connected to the manufacturing module (4) and to receive powder located in the manufacturing module (4); a glovebox (25) being able to be closed in a sealed manner; a provisioning circuit configured to transfer powder located in the glovebox (25) to the main hopper (29); and a circulation system designed to set powder in motion according to a circulation loop closed on itself, the circulation system comprising a suction system (21) designed to evacuate gas present in the circulation loop, the circulation loop passing through the main hopper (29) and the suction system (21).

A supply module (2) for supplying additive manufacturing powder comprises: a main hopper (29) for storing additive manufacturing powder, the main hopper (29) being designed to be connected to a manufacturing module (4) configured to additively manufacture an object from the powder; an inlet (211) of the supply module (2) designed to be connected to the manufacturing module (4) and to receive powder located in the manufacturing module (4); a glovebox (25) being able to be closed in a sealed manner; a provisioning circuit configured to transfer powder located in the glovebox (25) to the main hopper (29); and a circulation system designed to set powder in motion according to a circulation loop closed on itself, the circulation system comprising a suction system (21) designed to evacuate gas present in the circulation loop, the circulation loop passing through the main hopper (29) and the suction system (21).

Provision module (2) for providing additive manufacturing powder, comprising a main hopper (29) for storing additive manufacturing powder, the main hopper (29) being designed to be connected to a manufacturing module (4) configured to additively manufacture an object from the powder located in the main hopper (29), an inlet (211) of the provision module (2), which inlet is designed to be connected to the manufacturing module (4) and to receive powder located in the manufacturing module (4), a glovebox (25) designed to receive a container (28), the glovebox (25) being able to be closed in a sealed manner, a supply circuit configured to transfer powder located in the glovebox (25) to the main hopper (29), an extraction circuit that is different from the supply circuit and is configured to transfer additive manufacturing powder from the inlet (211) of the provision module (2) to the container (28), when the container (28) is received in the glovebox (25), the glovebox (25) comprising gloves (251) for closing the container (28) once it has been filled with powder, while the glovebox (25) is closed.