Abstract: A method of printing a multi-material part in a layer-wise manner with an extrusion-based 3D printer includes providing a sliced digital model of a multi-material part and determining a number of materials in each of the slices of the digital mode. The method includes utilizing a digital model of a purge tower having N subdivisions having a closed geometry, wherein N is the number of print heads needed to print the part that is greater than or equal to three, each adjacent subdivision contact one another along an interface and assigning each print head to one subdivision and to tool paths forming the one subdivision in each layer. The method includes reassigning the assigned subdivision within the purge tower of an inactive print head in a layer to a print head that is active in the layer of the multi-material part.

Abstract: 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.

Abstract: 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.

Abstract: A method of moving a print head between a plurality of partitioned chambers in a 3D printer includes providing the 3D printer having a thermal barrier having an area defined by a length and width, wherein a print head nozzle can be positioned through the thermal barrier along the width or the length and at least two partitioned chambers below the area of the thermal barrier, wherein a first chamber comprises a printing chamber and a second chamber comprises a chamber providing another functionality. The method includes raising the print head in a z direction from the second chamber to above the thermal barrier and moving the print head in a x-y direction from above the second chamber over the partition to a location above the first chamber. The method also includes lowering the print head in the z direction and into the first chamber such that an extrusion port of a nozzle of the print head is proximate a x-y print plane.

Abstract: A 3D printer includes a gantry configured to move in a plane and in a direction substantially normal to the plane and at least one print head carried by the gantry, the at least on print head comprising an extrusion nozzle at a bottom end. The 3D printer includes a plurality of partitioned chambers accessible by the at least one print head, each of the partitioned chambers having an upper edge defining an opening into each of the plurality of chambers, and a platen within a first chamber of the plurality of chambers, the platen configured to receive material from the print head to print the 3D part.

Abstract: 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.

Abstract: In a cursor-based computing environment generating a display, a user-definable interface is configured by a user and activated when needed by a user, wherein the user-definable interface comprises a plurality of buttons. Functions of the buttons are selectable by the user according to his preferences. These preferences may be derived from applications or by functions selected exclusively by the user. An application (ZTool) is also described, this application allowing configuration of a display in accordance with predetermined parameters. These parameters may be related to data base access functions or other types of data access, including logistical support.

Abstract: A system and method for using a user definable interface (UDI). A display displays the interface. The interface comprises a plurality of levels each having a plurality of command regions. The visual appearance of the interface remains substantially the same for each of the plurality of levels and only one of the levels appears at a given time. An input device allows a user to select among the command regions at each of the plurality of levels to access another level or perform a function associated with a selected one of the command regions.

Abstract: In a cursor-based computing environment having a display, a user definable interface (UDI) is displayed upon activation by a user. The UDI has a plurality of levels each having a plurality of buttons and is displayed in a selectable position about a pointer position in a display area to reduce pointer commute. The user selects a visual appearance and shape of the UDI, and the number of buttons. The user assigns a command to each of the plurality of buttons at each of the plurality of levels by dragging and dropping from one or more applications of the apparatus.

Abstract: A fish processing unit for longitudinally quartering a fish during a single pass through the unit. A fish is laid on its side and longitudinally oriented in alignment with the direction of travel of a conveyor belt. The conveyor belt passes over the top surface of a front table assembly, then into a fish quartering assembly, and then on to the top surface of a rear table assembly. Within the interior of the fish quartering assembly are mounted a plurality of circular blades that are driven by hydraulic motors. Two of the circular blades are vertically oriented in the same plane with one spaced above the other a predetermined height H1. Two other pairs of horizontally oriented circular blades have their inner edges aligned with each other and they are positioned to the respective sides of the vertically oriented circular blades. What starts out as a whole fish exits the fish quartering assembly in four quarter pieces and a throw portion that includes the backbone of the fish.