An assembly includes an attachment arm having an axle extending from a first end of the attachment arm. The attachment arm of the detachable wheel assembly further includes a securing portion forming a second end of the attachment arm, the securing portion of the attachment arm including a pin positioned to extend above a first frame member of a gantry truss and to secure the first frame member between the pin and a portion of the attachment arm. The attachment arm also includes a frame support corresponding to a second frame member of the gantry truss such that the frame support supports the second frame member when the assembly is secured to the gantry truss, and the assembly includes a wheel rotatably attached to the axle of the attachment arm.

The present disclosure provides various aspects for mobile and automated processing utilizing additive manufacturing. The present disclosure includes methods for adding line features to a roadway surface. In some examples, the line features may include wires, conduits and electronic components. In some examples, the mobile additive manufacturing apparatus may create communication means into an advanced roadway in line features, which may be used for various communications including communications to and from autonomous vehicles. The communications may involve data related to the operation of systems of autonomous vehicles. In other examples, the line features may be dynamically colored with LED components.

The present disclosure provides various aspects for mobile and automated processing utilizing additive manufacturing. The present disclosure includes methods for adding line features to a roadway surface. In some examples, the line features may include wires, conduits and electronic components. In some examples, the mobile additive manufacturing apparatus may create communication means into an advanced roadway in line features, which may be used for various communications including communications to and from autonomous vehicles. The communications may involve data related to the operation of systems of autonomous vehicles. In other examples, the line features may be dynamically colored with LED components.

A 3D printer includes a gantry configured to move in a plane substantially parallel to a x-y build plane and a print head configured to extrude molten material to print a 3D part in a layer-by-layer process. The 3D printer includes a platen configured to support the part being printed in the layer by layer process and positionable with a primary Z positioner along a z-axis substantially normal to the x-y build plane. The 3D printer includes a local Z positioner moved by the gantry, the local Z positioner comprising a linear motor configured to move the print head in the z-direction and having an operable range of motion extending from a nominal build position at which a nozzle of the print head is positioned in the x-y build plane to a raised position above the x-y build plane.

An interchangeable chamber is provided for a 3D printing device, wherein the interchangeable chamber includes a building space for receiving a building platform on which a three-dimensional object can be produced, which building space is designed to be temporarily open in the direction of a top of the interchangeable chamber, as well as optionally a storage container for storing building material and wherein the interchangeable chamber comprises a side wall and a cover, wherein the cover is adapted to close the interchangeable chamber at the top such that building material cannot get through the cover out of nor into the interchangeable chamber and the cover is coupled with the side wall.

An interchangeable chamber is provided for a 3D printing device, wherein the interchangeable chamber includes a building space for receiving a building platform on which a three-dimensional object can be produced, which building space is designed to be temporarily open in the direction of a top of the interchangeable chamber, as well as optionally a storage container for storing building material and wherein the interchangeable chamber comprises a side wall and a cover, wherein the cover is adapted to close the interchangeable chamber at the top such that building material cannot get through the cover out of nor into the interchangeable chamber and the cover is coupled with the side wall.

Methods to fabricate objects by 3D printing of poly-4-hydroxybutyrate (P4HB) and copolymers thereof have been developed. In one method, these objects are produced by continuous fused filament fabrication using an apparatus and conditions that overcome the problems of poor feeding of the filament resulting from the low softening temperature of the filament and heat creep along the fed filament. Methods using an apparatus including a heat sink, a melt tube, a heating block and nozzle, and a transition zone between the heat sink and heating block, with the melt tube extending through the heat sink, transition zone, and heat block to the nozzle are disclosed. 3D objects are also printed by fused pellet deposition (FPD), melt extrusion deposition (MED), selective laser melting (SLM), printing of slurries and solutions using a coagulation bath, and printing using a binding solution and polymer granules.

Methods to fabricate objects by 3D printing of poly-4-hydroxybutyrate (P4HB) and copolymers thereof have been developed. In one method, these objects are produced by continuous fused filament fabrication using an apparatus and conditions that overcome the problems of poor feeding of the filament resulting from the low softening temperature of the filament and heat creep along the fed filament. Methods using an apparatus including a heat sink, a melt tube, a heating block and nozzle, and a transition zone between the heat sink and heating block, with the melt tube extending through the heat sink, transition zone, and heat block to the nozzle are disclosed. 3D objects are also printed by fused pellet deposition (FPD), melt extrusion deposition (MED), selective laser melting (SLM), printing of slurries and solutions using a coagulation bath, and printing using a binding solution and polymer granules.

An additive manufacturing system configured to additively build an article can include an energy applicator, a build platform, and a powder nozzle configured to eject powder toward the build platform to be acted on by the energy applicator. The system can include a control module configured to control the energy applicator to create an amorphous structure forming at least a portion of the article.

An additive manufacturing system configured to additively build an article can include an energy applicator, a build platform, and a powder nozzle configured to eject powder toward the build platform to be acted on by the energy applicator. The system can include a control module configured to control the energy applicator to create an amorphous structure forming at least a portion of the article.