Abstract: A method and a system of three-dimensional (3D) printing are provided. The method of 3D printing is adapted to a 3D printing apparatus and includes following steps: slicing a 3D object model into a plurality of sub-slicing layers according to a printing plane; merging a default number of adjacent sub-slicing layers into a plurality of grey-scale slicing layers; and, printing a 3D object according to the grey-scale slicing layers. The thickness of each sub-slicing layer is thinner than the thickness of a default layer used whenever the 3D printing apparatus performs a single printing process. The thickness of each of the grey-scale slicing layers is equal to the thickness of the default layer used whenever the 3D printing apparatus performs the single printing process.

Abstract: A 3D printing device and a resume printing method thereof are provided. The method includes: executing printing commands sequentially to control a print head for printing; obtaining a first printing command executed when a printing interruption occurs, and resuming printing according to the first printing command.

Abstract: A three-dimensional printing nozzle structure including a heater, a nozzle, a feed tube and a baffle member is provided. The heater has a first through hole. The nozzle is connected to the heater and has a second through hole. The feed tube passes through the first through hole and has a feed channel. The first through hole, the second through hole and the feed channel are aligned with each other. A filament moves along the feed channel to pass through the heater. The heater heats and melts the filament, and the filament that has been melted moves from the feed channel into the second through hole to be extruded. The baffle member is disposed inside the first through hole and located between the feed channel and the second through hole. The baffle member is configured to adjust a degree of communication between the feed channel and the second through hole.

Abstract: A distributed printing method of a powder-bed type 3D printer is present. The method first generates, for each printing layer of a 3D model file, a color image which is applied to print an outer contour part and a non-color image which is applied to print an internal structure part. The method then calculates replacing information according to a default adjusting module, and adjusts color information of the color image and adhesive information of the non-color image based on the replacing information. Finally, the method combines the adjusted color image and non-color image for generating a final printing image, and executes printing according to the final printing image.

Abstract: A printing method for printing a multi-material 3D model comprises the following steps: perform a slicing process on a multi-material 3D object to generate the multi-material object slices and the object slices of a useful object; compute a material-switching point and a retrieving point during the slicing process; print the multi-material object slices of a multi-material 3D model with one of the materials; when print to the material-switching point, switch to another different material and print useful objects with the material used before the material switching; when print to the retrieving point, print the multi-material object slices with the material used after the material switching; and repeat the above steps until completing the multi-material 3D model printing. The present disclosed example prints the useful object via the remaining materials after the material switching which effectively reduces the cost with of multi-materials printing.

Abstract: A printing slicing method for 3D model for automatically adding a required supporting structure to a 3D model is disclosed. The method includes following steps. Retrieve a minimum overlapping ratio corresponding to a layer height. Execute a slicing process and analyze an overlapping ratio between two molded object slices which form a suspended slope. Add the supporting structure below the corresponding suspended slope when determining that the overlapping ratio is less than the minimum overlap ratio. This disclosed example can effectively prevent the suspended part of a printed 3D model entity from a deformation because of the adhesion area thereon is too small, and can also effectively save the printing time and the usage amount of supplies.

Abstract: A three dimensional printing apparatus including a tank, an injecting module, a leveling module, a curing module, and a control module is provided. The injecting module is disposed at the tank to inject a liquid forming material into the tank. The leveling module is movably disposed in the tank. The curing module is disposed above the tank. The control module is electrically connected to the injecting module, the leveling module, and the curing module. The leveling module is controlled by the control module to be moved in the tank, so as to level a surface of the liquid forming material. The curing module is controlled by the control module to cure the leveled liquid forming material to form a solidification layer.

Abstract: A printing material for a three-dimensional (3D) printing apparatus is provided. The printing material includes a core and a shell covering the core, wherein the Shore hardness of the core is A45-A90, the Shore hardness of the shell is D40-D85, the Shore hardness of the shell is higher than the Shore hardness of the core, the volume percentage of the shell is 10% to 30%, and the volume percentage of the core is 70% to 90%. Since the printing material has a specific structure, feed abnormality during the printing material passing through a narrow inlet hole and guide tube may be prevented in the use of low-hardness material as the core.

Abstract: A calibration method of a delta 3D printer, wherein a vertical calibration mechanism is disposed on a vertical direction, a horizontal calibration mechanism is disposed on the horizontal direction and a printing-platform calibration mechanism is disposed under the printing-platform of the 3D printer. Before performing a new printing task, the 3D printer first controls three sliding components to move vertically and performs a calibration on the Z-Axis via the vertical calibration mechanism. Next, controls the nozzle to move horizontally and performs a calibration on X-Axis and the Y-Axis via the horizontal calibration mechanism. After the X-Axis, Y-Axis and Z-Axis are all calibrated, the 3D printer performs a tilt degree calibration on the printing-platform via the printing-platform calibration mechanism. Lastly, after performing all calibration operations, the 3D printer starts to execute the new printing task.

Abstract: A 3D printing apparatus including a forming assembly, a scraping tool, a first collection tank, a sweeping tool and a second collection tank is provided. A roller of the forming assembly is adhered with a forming material during a forming process. When the roller is rotated, the scraping tool removes the forming material adhered on the surface of the roller. The scraping tool is disposed between the first collection tank and the roller. The forming material removed from the surface of the roller is guided into the first collection tank. The sweeping tool is configured to sweep the forming material in the first collection tank to a position of the first collection tank. The second collection tank is connected to the position of the first collection tank to receive the forming material swept to the position by the sweeping tool.

Abstract: A printing method for a 3D printer is present. After opening a 3D model, the method divides the 3D model into several area objects which are separately corresponding to different areas of the 3D model being formed on a forming platform of the printer. When executing printing procedures, the method firstly determines a lowest area object of the several unfinished area objects. Then, a nozzle array of the 3D printer is controlled to move to upon an area according to the determined area object, and to jet ink upon the area for stacking the determined area object. After the determined area object is stacked completely, the nozzle array is then controlled to move to other area and stack other area object.

Abstract: A method and an apparatus of three-dimensional (3D) printing and an electronic apparatus are provided. The 3D printing method is adapted for printing a 3D object and includes the following. A plurality of layer objects of a 3D model are obtained, and a plurality of two-dimensional images, which correspond to a slice plane, of each of the layer objects are generated. The layer objects include a first layer object and a second layer object. When a comparison relationship between a two-dimensional image of the first layer object and a two-dimensional image of the second layer object matches a stack condition, the first layer object and the second layer object are stacked to generate thickness stack information of a stack object. A printing mechanism is initiated according to the thickness stack information so as to print a 3D object associated with the 3D model.

Abstract: A wire fusing apparatus including a first body having a first surface, a second body having a second surface, and a heating unit is provided. The second body is pivoted to the first body to rotate relatively to the first body enabling the first and second bodies to be in an expanded or a closed state. When the first and second bodies are in the closed state, the first and second surfaces define a closed containing groove for containing two independent wires butt jointed with each other. The first surface, the second surface and the containing groove each has a heat-conducting region, and the heat-conducting regions contact each other when the first and second bodies are in the closed state. The heating unit disposed on the first or second body contacts one of the heat-conducting regions for heat-fusing a butt-jointing point of the wires to form a fused wire.

Abstract: A 3D printing method adapted to a 3D printing apparatus to print a 3D object is provided. The 3D object includes at least one forming layer. The 3D printing apparatus includes a platform, a nozzle module, a roller and a curing module. The 3D printing method includes: setting an initial height of the roller relative to the platform and setting a moving pitch in height of the roller relative to the platform according to design data of the 3D object; spraying at least one layer of a liquid forming material on the platform by the nozzle module; curing the liquid forming material into a first forming layer by the curing module; spraying the liquid forming material on the first forming layer; and levelling the liquid forming material on the first forming layer by the roller.

Abstract: A 3D printing apparatus and a method thereof are provided. The apparatus includes base, forming platform, nozzle module, curing module, first sensor and second sensors and control module. The forming platform is movably disposed on the base along an axial direction. The nozzle module and the curing module are disposed on the base and located above the forming platform. The first and second sensors are movably disposed on the base and located at two opposite sides of the nozzle module and the curing module along the axial direction. A predetermined range of the 3D object on the forming platform has first and second endpoints along the axial direction, and the first and second sensors respectively correspond to the first and second endpoints. The control module determines whether the nozzle module impacts the 3D object according to a sensing time difference of the first and second sensors.

Abstract: A printing correction method and a 3D printing device are provided, and the printing correction method is adapted to the 3D printing device having a printing platform. The printing correction method is as follows. An electric field is provided to the printing platform. A detection probe is extended towards a position of the printing platform along a first axial direction to enter the electric field, where the position is defined as an initial position. The detection probe is moved from the initial position along a moving path on the printing platform, and when the detection probe is moved along the moving path, an electric field variation is detected to determine a tilt variation of the printing platform relative to the first axial direction. It is determined whether to correct the printing platform according to the tilt variation of the printing platform.

Abstract: An automatic inkjet head cleaning method for a powder bed and inkjet 3D printer is provided, and the method includes steps: controlling a powder-laying module and a plurality of the inkjet heads of the powder bed and inkjet 3D printer to print a 3D physical model according to 3D printing data; retrieving a status value continuously or intermittently during printing; executing the first cleaning procedure for cleaning all or parts of the inkjet heads when determining the status value satisfies the first cleaning configuration value; and executing the second cleaning procedure for cleaning all or parts of the inkjet heads when determining the status value satisfies the second cleaning configuration value. The method automatically cleans the inkjet heads during the printing process, which effectively improves printing quality and reduces printing failure rates.

Abstract: A three dimension (3D) printing coloring method and a 3D printing system are provided. The method includes: generating printing object information according to model information of a 3D object, where the printing object information includes first contour coloring information and second contour coloring information; determining whether a similarity degree of the first contour coloring information and the second contour coloring information conforms to a default condition; if the similarity degree conforms to the default condition, controlling, according to the first contour coloring information and the second contour coloring information, a 3D printing device to perform a simultaneous coloring operation on a first printing layer and a second printing layer of a 3D object. Therefore, a working efficiency of the 3D printing device can be improved.

Abstract: A 3-D printing apparatus of the invention includes a process unit, a 3-D display unit, a base and a printing head. The processing unit is configured to read and process a digital 3-D model information. The base has a carrying surface. The 3-D display unit is coupled to and controlled by the processing unit and configured to display a digital 3-D image related to the digital 3-D model on the carrying surface for previewing, wherein the 3-D image is corresponding to a 3-D object related to the digital 3-D model. The printing head is disposed above the base and coupled to the processing unit, wherein the processing unit controls the printing head to dispense a base material formed on the carrying surface layer by layer so as to form the 3-D object according to the digital 3-D model information and following an image contour of the 3-D image.

Abstract: A three-dimensional (3-D) printing apparatus and a three dimensional printing method are provided. The three dimensional printing method includes following steps. A closed printing path of a closed-contour structure is obtained, wherein the closed printing path includes a printing start point and a printing end point. A printing head is controlled to move from the printing start point and along a front segment of the closed printing path according to a first moving speed, and the printing head is controlled to simultaneously extrude a building material. After the printing head moves along the front segment of the closed printing path, the printing head is controlled to move to the printing end point along a rear segment of the closed printing path according to a second moving speed, and the printing head is controlled to simultaneously extrude the building material. The second moving speed is less than the first moving speed.