Abstract: A stereolithography apparatus including a base, an elevator track, a threaded rod, a sliding bracket, a nut, a plurality of friction-reducing components, and a printing platform. The sliding track is disposed on the base. The threaded rod is disposed on the base and an axial direction of the threaded rod is parallel to the elevator track. The sliding bracket is slidably disposed on the elevator track. The nut is set on the threaded rod to be driven by the threaded rod to slide along the threaded rod. The sliding bracket clamps the nut to be driven by the nut to slide along the elevator track. The friction-reducing components are disposed between the nut and the sliding bracket for the nut to move relatively to the sliding bracket. The printing platform is disposed on the sliding bracket to slide with the sliding bracket along the elevator track.

Abstract: A color three-dimensional printing method and three-dimensional printing equipment are provided, which are adapted to present a color pattern on a three-dimensional object. The method includes following steps. A color image including the color pattern is obtained, and the color image includes a plurality of pixels. An inkjet depth of each of the pixels is determined based on a color feature of each of the pixels. A three-dimensional model of the three-dimensional object is sliced to generate layer information of a plurality of layer objects. A plurality of inkjet pictures corresponding to the layer objects are obtained based on the inkjet depths of the respective pixels.

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 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 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 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 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 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: 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 printing apparatus and a controlling method thereof are provided. A first forming material and a second forming material are adapted for being fed into a melting nozzle. A controller determines a first pulling-back amount according to a first feeding-in ratio of the first forming material and determines a second pulling-back amount according to a second feeding-in ratio of the second forming material. During a period in which a printing module stops extruding any material, the controller controls a feeding module to pull back the first forming material along a direction which is departing from a melting nozzle and controls the feeding module to pull back the second forming material along the direction which is departing from the melting nozzle.

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.

Abstract: The invention provides a method for height difference measurement between the print heads and a 3D printer using the method. The 3D printer includes a printing module, a contact sensor, a movement sensor and a controller. The controller makes a 3D print head and the contact sensor contact to each other vertically for generating a contact signal, and obtains a first height value according to a vertical movement distance between the printing module and the contact sensor. The controller makes a color head and the contact sensor contact to each other vertically for generating the contact signal, and obtains a second height value according to a vertical movement distance between the printing module and the contact sensor. The controller obtains a height difference between the 3D print head and the color head according to the first height value and the second height value.

Abstract: An image file transform method and a three-dimensional (3D) printing system are provided. The method includes: analyzing a first slicing image file having a first size to obtain a valid region in the first slicing image file; performing an image file transform operation on the first slicing image file according to the valid region to generate a second slicing image file having a second size, wherein the second slicing image file includes the valid region, and the second size is smaller than the first size; and setting an index for the second slicing image file according to the image file transform operation, wherein the index is used for a 3D printing apparatus to set a printing start point corresponding to the second slicing image file. Therefore, a storage efficiency of slicing image files for 3D printing is improved.

Abstract: A three-dimension (3-D) printing method and a 3-D printing system are provided. The method includes: generating printing information according to model information of a 3-D object; controlling a 3-D printing apparatus to perform a 3-D printing operation, so as to print a supporting object and the 3-D object, wherein the supporting object is used to support the 3-D object. Furthermore, the step of generating the printing information includes: detecting a floating contour of the 3-D object on the first printing layer according to the model information; and removing printing information of the supporting object from printing information corresponding to a second printing layer according to the floating contour. Thereby, difficulty of removing the supporting object can be reduced.