Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Other

Peridot Print LLC

Matthew Allen Shepherd

Vanessa Verzwyvelt

Wesley R Schalk

Morgan Thomas Schramm

Arthur H Barnes

Hector Jose Lebron

Jake Wright

Jay Stephen Gondek

Mark H MacKenzie

Jason M Quintana

Sergio Gonzalez

Josh Shepherd

Duane A Koehler

Stephen G Rudisill

Pierre Joseph Kaiser

Hsue-Yang Liu

Mark Mackenzie

Marc Yousey

Steve Orrin Rasmussen

Robert M Yraceburu

Alexey S Kabalnov

Trudy L Benjamin

Daniel Steven Kline

Scott A White

Jacob Wright

Erick Blane Kinas

Weiyun Sun

Junji Yamamoto

Bruce A Axten

Brent Ewald

John F Meyer

Volker Smektala

John M Skene

Dawn M Beachnau Hood

Garrard Hume

Xin Cheng

Guan-Kwee Goh

Milan Justel

Todd Goyen

Dawn Beachnau Hood

Michael W Cumbie

Alexander N Govyadinov

Eric T Martin

Vladek P Kasperchik

Steven H Walker

Jefferson Patrick Ward

Lihua Zhao

Joseph M Torgerson

Shannon Reuben Woodruff

Justin M Roman

Stephen William Bauer

Allan G Olson

Matt G Driggers

Sam Michael Sarmast

Mark D Lund

Guo Li

Bradley D Chung

Ingeborg Tastl

Andrew E Fitzhugh

Tsuyoshi Yamashita

Paul A Richards

Thomas Michael Sabo

Sergio Gonzalez Martin

John Joseph Briden

Charles G Dupuy

William F Winters

Kevin Bruce

Alvin Post

Steven E Soar

Jordi Roca Vila

Maxwell S DeHaven

Al Olson

Jordi Gonzalez Rogel

Douglas Harriman

Luanne J Rolly

Barret Kammerzell

Miguel Angel Lopez Alvarez

Alex Carruesco Llorens

Thieu X Dang

Robert Harbour

Walter D Clark

Lee Walter Jackson

Mike Burton

Jordi Roca

Sheldon A Bernard

Joe Torgerson

Arturo Domingo Millan

Victor Tung

Thomas Griffiths

Mark H MacKenize

Joshua Shepherd

Tod Goyen

Tom Deskins

Mark H Mackenzie

According to examples, an apparatus may include a processor that may access information about a screen device having pores, in which the screen device is to be employed to filter liquid from a slurry composed of the liquid and material elements to form a part from the material elements. The processor may also access information about a main body, in which the main body is to support the screen device during formation of the part and has a plurality of openings that are larger than the pores in the screen device. The processor may identify, based on relative locations of the pores and the openings, pores that are to be removed from the screen device to increase uniformity of liquid flow through the pores across the screen device and may modify the accessed information about the screen device to remove the identified pores from the screen device.

Pore removal from screen devices to increase flow uniformity

In an example implementation, a method of compensating for dimensional variation in 3D printing includes receiving a voxel space model that represents a 3D object to be printed within a build volume of a 3D printing system, asymmetrically eroding voxels from the voxel space model, and printing the 3D object based on the asymmetrically eroded voxel space model.

Compensating for dimensional variation in 3D printing

According to examples, an apparatus may include a processor and a memory on which are stored machine-readable instructions that when executed by the processor, may cause the processor to identify a property of a portion of a three-dimensional (3D) part to be fabricated and determine, based on the identified property, a thermal value associated with the portion. The instructions may also cause the processor to, based on the determined thermal value, determine a first agent composition to be used to fabricate the portion and determine a second agent composition to be used to fabricate a section external and adjacent to the portion, in which the first agent composition and the second agent composition may be determined to cause the portion and the external section to be fabricated to have the identified property while maintaining the external section separate from the portion.

Agent composition determination based on thermal values

In an example, a method includes receiving, at a processor, a data comprising a model of an object to be generated in additive manufacturing. The data comprises object model data representing an object model as a plurality of initial polygons and object property data associated with the initial polygons. The method may comprise generating a representation of a slice of the object model defined between two planes and generating a plurality of polygons to represent the slice of the object model. A mapping between the object property data and the generated plurality of polygons may also be generated.

Generating object model slices

In an example, a method include receiving a data model of an object to be generated in additive manufacturing at a processor, the data model comprising object property data. A segmentation of a virtual build volume comprising at least a portion of the object into a plurality of nested segments may be derived. A first segment may be associated with first object generation parameters and a second segment may be associated with second, different, object generation parameters. A number of nested segments to be derived may be determined based on at least one of a geometry of the object and an intended object property.

Nested segments in object models for additive manufacturing

In some examples, an additive manufacturing system includes a dispensing device, an applicator, a thermal energy source, a thermal imaging device, and a controller. The controller is to cause the dispensing device to deposit a layer of build material and cause the applicator to apply the fusing agent to form an object portion and to apply the detailing agent to form a reference portion in the layer of build material. The controller is to cause the thermal energy source to heat the reference portion and to heat and fuse the object portion and cause the thermal imaging device to measure a temperature of the reference portion. The controller is to regulate a power level of the thermal energy source based on a comparison between the temperature of the reference portion and a set-point for the reference portion, which is based on a target temperature for the object portion.

Temperature control in additive manufacturing systems

A control system for a three-dimensional printer includes an energy component interface, an agent depositing component interface, and control logic. The control logic controls the operation of an energy component through the energy component interface and an agent depositing component through the agent depositing component, in forming an output object that is specified in a print job. Additionally, in some examples, the control logic can implement a plurality of modes. Each mode, when selected modulate one or more operational parameters of a least one of the energy component or agent depositing component.

Modulating a three-dimensional printer system based on a selected mode

In one example, a fusing system for an additive manufacturing machine includes a first carriage carrying a layering device and a fusing lamp, and a second carriage carrying a fusing agent dispenser. The first carriage and the second carriage are movable back and forth over the work area along the same line of motion so that the first carriage follows the second carriage in one direction and the second carriage follows the first carriage in the other direction.

Additive manufacturing

In an example implementation, a method of printing a three-dimensional (3D) object includes scanning a print bar in a first direction over a build platform of a 3D printer to deposit a liquid agent onto a layer of build powder. The print bar is then indexed in a second direction substantially orthogonal to the first direction before scanning the print bar back over the build platform in a third direction opposite the first direction to deposit additional liquid agent onto the layer of build powder.

Indexing in 3D printing

A system for presenting a soft-proof of a three-dimensional (3D) printed part may include a processor, and a memory device communicatively coupled to the processor. The system may also include a communication link to support communication with a 3D printing device, and computer usable program code to, when executed by the processor, retrieve data from the 3D printing device defining at least one capability of the 3D printing device that affects an appearance of a part when printed. The system may also include an application programming interface (API) to provide data defining generation of a soft-proof of the part based on the at least one capability of the 3D printing device, the soft-proof of the part depicting characteristics of the part as the part appears as printed.

Soft-proof of three-dimensional (3D) printed parts

In an example, a method includes receiving object model data describing at least a portion of an object to be generated by additive manufacturing. Object generation instructions for generating the object in its entirety may be derived based on the object model data. Where it is determined that the object model data comprises a data deficiency for deriving the object generation instructions, at least one attribute for the object may be inferred and object generation instructions may be derived based on the object model data and the inferred attribute.

Inferring object attributes

In an example, a method includes acquiring, at a processor, a data model of an object to be generated in additive manufacturing, the data model comprising object model data representing a slice of the object model as a plurality of polygons and object property data comprising property data associated with the plurality of polygons. The slice may be inspected from a predetermined perspective at a plurality of discrete locations. It may be determined if each location is within a face of a polygon, and if so, the object property data associated with that polygon may be identified and associated with that location. The slice may further be inspected at a plurality of discrete locations along an edge of a polygon, the object property data associated with each location may be identified and associated with that location.

Associating object property data with locations

In an example, a method includes receiving, at least one processor, a mesh model for an object, a first transformation matrix to apply to the mesh model to describe a first object for generation in additive manufacturing and a second transformation matrix to apply to the mesh model to describe a second object for generation in additive manufacturing. The method may further include determining, by at least one processor, if the first and second transformation matrices describe transformations which are equivalent in terms of mesh errors and, if so, inspecting the mesh model for mesh errors once for both the first and second transformation matrices.

Inspecting mesh models

An additive manufacturing apparatus includes an additive manufacturing engine and an input to receive a plurality of part files to create a plurality of parts. Each part file includes a description of a part to be created by the additive manufacturing engine. A processor interprets a part file to read the description of the part from the part file, stores at least a portion of the description of the part, and repeats the interpretation and storing for each of the received part files. A job composer generates a manufacturing job using the stored descriptions and using characteristics of the additive manufacturing engine, and provides the generated manufacturing job to the additive manufacturing engine.

Generating a manufacturing job

In an example implementation, a method of compensating for dimensional variation in 3D printing includes receiving a 3D object model that represents a 3D part to be printed. The method also includes receiving a build material type and a position for printing the 3D part within a build volume. The method includes determining from the position, target subvolumes of the build volume into which the 3D part is to be printed, retrieving a dimensional compensation factor associated with each target subvolume, and then applying each dimensional compensation factor to the 3D object model to scale the 3D part according to the position of the 3D part within the build volume.

Growing community of inventors

Vancouver, WA, United States of America

Matthew Allen Shepherd