Abstract: An example system includes an object and a support frame supporting the object. The support frame constrains movement of the object relative to the support frame, and the support frame includes at least one of a cage or a shackle to non-rigidly constrain movement of at least a part of the object.

Abstract: In example implementations, an apparatus is provided. The apparatus includes a light table, a camera, and a processor communicatively coupled to the light table and the camera. The light table is to emit light through an object on the light table. The camera is to capture an image of the light table. The processor is to receive an image of the light table without the object, receive an image of the light table with the object, and calculate a transmission value for each pixel of the object in the image of the light table with the object, wherein a mechanical property of the object is to be determined based on the transmission value of the object.

Abstract: A device includes a material dispenser and a fluid dispenser. The material dispenser is to dispense a build material layer-by-layer, to at least partially additively form a first 3D object. The fluid dispenser is to dispense at least one fluid agent at selectable exterior voxel locations of the respective layers to at least partially define an external surface of the first 3D object as a first color to represent a first non-color material property of at least a first portion of the first 3D object. The selection of the first color is independent of characteristics of the first non-color material property.

Abstract: 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.

Abstract: A three-dimensional (3D) printed object is described. The 3D printed object comprises a polymer. A surface of the 3D printed object comprises the polymer 5 and a UV absorbing colorant. The surface has a surface area roughness Sa (arithmetical mean height) of ?5.0 ?m. A method for preparing a three dimensional (3D) printed object having a smooth surface is also described.

Abstract: A three-dimensional printing method can include iteratively applying polymer build material as individual layers; based on a three-dimensional object model, selectively jetting an electromagnetic radiation absorber and a translucency-modulating plasticizer onto individual layers of the polymer build material; and exposing the powder bed to electromagnetic energy to selectively fuse portions of individual layers of the polymer build material together to form a three-dimensional object. The polymer build material can include from about 60 wt % to 100 wt % polymeric particles having an average particle size from about 10 ?m to about 150 ?m and a degree of crystallinity from about 2% to about 60%, to a powder bed. At the locations where the polymer build material includes jetted translucency-modulating plasticizer, the three-dimensional object can exhibit an optical transmittance from about 5% to about 80%.

Abstract: An example non-transitory computer-readable medium comprising instructions that, when executed by a processor, cause the processor to generate a first surface based on an edge of a three-dimensional (3D) model. The first surface includes values indicating no displacement at locations of the first surface corresponding to the edge of the 3D model. The instructions, when executed by the processor, cause the processor to merge the first surface with a second surface to produce a third surface. The third surface includes values indicating no displacement at locations of the third surface corresponding to the edge of the 3D model.

Abstract: In an example, a method includes receiving, at a processor, a plurality of property parameter sets representing attainable property combinations in additive manufacturing and being associated with print material description. A constraint of a first property of the property parameter sets may also be received and a hull of a property mapping resource for use in determining additive manufacturing instructions for generating an object in which the first property meets the received constraint may be determined.

Abstract: An apparatus receives a first image of an object captured under a first light measurement condition and receives a second image of the object captured under a second light measurement condition. The apparatus determines a first transmission value of the object based on the first image, determines a second transmission value of the object based on the second image, and determines, based on a difference between the first transmission value and the second transmission value, a light scattering property of the object.

Abstract: A grazing light system for detecting three-dimensional (3D) Additive Manufacturing Device (3D) part lift and drag may include a grazing light directed along an x, y plane of a build region to illuminate the surface of the build region, an image capture device to capture an image of the build region as illuminated by the grazing light, and an image analysis module to detect protrusions of the part along the x, y plane based on variations of luminance information within data representing the image.

Abstract: A three-dimensional printing system includes a controller to instruct a fusing agent distributor to selectively apply a fusing agent to a first region of a layer of build material. The controller also determines a subset of voxels in the layer of build material to provide an opacifying agent based on an opacity value of an opacified region of an object to be generated and instructs an opacifying agent distributor to apply the opacifying agent to the determined subset of voxels.

Abstract: According to an example, an apparatus may include a processor and a memory on which is stored instructions that are to cause the processor to identify features for a three-dimensional (3D) indicator object to be fabricated by a 3D fabricating device, in which the identified features define a shape and a pattern of colors for the 3D indicator object. The instructions may also cause the processor to instruct the 3D fabricating device to fabricate the 3D indicator object to have the identified features, in which the 3D indicator object has a shape having a plurality of surfaces on which a plurality of colors are arranged in a certain pattern as defined by the identified features, and in which each of the plurality of surfaces has the same certain pattern of the plurality of colors and determine properties of the fabricated 3D indicator object.

Abstract: 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.

Abstract: A non-transitory medium having machine-readable instructions stored thereon is provided. The instructions include reference-object code to print a three-dimensional object in a coordinate system of a printer. The three-dimensional object includes a first loop portion comprising a length of a cylindrical body that extends arcuately between spaced apart ends thereof in through each axis of the coordinate system. A second loop portion comprising another length of the cylindrical body extends arcuately between spaced apart ends thereof through each axis of the coordinate system. The second loop portion is opposing and coupled with the first loop portion by respective curved leg portions of the cylindrical body to define a continuous loop that circumscribes a virtual axis thereof aligned with a layering direction of the printer. Each portion of the cylindrical body is asymmetrical with respect to each other.

Abstract: In example implementations, an apparatus is provided. The apparatus includes a light table, a camera, and a processor. The light table is to hold an object. The camera is to capture images. The light table is positioned within a field of view of the camera. The processor is communicatively coupled to the camera to receive the images. The processor is to analyze the images to calculate an imaged transmission percentage at a plurality of different locations of the object based on a correlation function of the camera used to determine an amount of print agents to be dispense by a three dimensional printer to print the object.

Abstract: In an example, a method includes receiving, at a processor, a first matrix comprising a set of print coverage vectors, each print coverage vector specifying print materials for object generation using additive manufacturing and a second matrix comprising a corresponding set of properties for objects generated using the print coverage vectors. The method may further include determining, by the processor, a solution to an objective function relating the first and second matrices.

Abstract: A computing system can include a preview module and a display interface. In some examples, the preview module can obtain adjustment values for adjusting an operation for a printer to achieve or form an output of the printer with a set of attributes included in a print job. Additionally, the preview module can generate a preview of the output, based on the adjustment values, the set of attributes and a set of configuration parameters of the display component. In such examples, the preview can be based on the adjustment values, the set of attributes and a set of configuration parameters of the display component. In some examples, the preview module can communicate the preview of the output to a display component using the display interface.

Abstract: In an example, a method includes receiving, at a processor, a plurality of property parameter sets representing attainable property combinations in additive manufacturing and being associated with print material description. A constraint of a first property of the property parameter sets may also be received and a hull of a property mapping resource for use in determining additive manufacturing instructions for generating an object in which the first property meets the received constraint may be determined.

Abstract: Examples analyze three-dimensional printing specifications associated with a three-dimensional printing device to determine test angles for a test object and test surfaces corresponding to the test angles for the test object. Examples generate the test object for color calibration for the three-dimensional printing device based at least in part on the test angles and test surfaces that are configured with at least one test color.

Abstract: In one example in accordance with the present disclosure a three-dimensional illumination chart is described. The chart includes a substrate divided into a number of portions. Each portion includes a raised relief pattern disposed thereon having a relief angle relative to a reference line. Each relief angle of the raised relief patterns of the number of portions is different from other relief angles of other raised relief patterns of other of the number of portions.