Abstract: Dental appliances, materials, and methods of forming such appliances and materials for improved laser marking are provided herein including the use of textured and/or roughened surfaces to enhance laser marking.

Abstract: A slicing method for horizontal facets of color 3D object includes following steps: executing a slicing procedure; calculating an intersection (4) of any polygon facet (3) of a color 3D object with one of a plurality of slicing planes (2); determining whether the polygon facet (3) is a horizontal facet; determining whether the slicing plane (2) currently processed is a highest slicing plane intersecting with the polygon facet (3) if the polygon facet (3) is determined as a horizontal facet; calculating another intersection (4) of the polygon facet (3) with next slicing plane (2) if the slicing plane (2) currently processed is not the highest slicing plane; performing a pixelated procedure to the polygon facet (3) for generating pixelated color data (5) if the slicing plane (2) currently processed is the highest slicing plane; and storing the pixelated color data (5) to a slicing file of the highest slicing plane.

Abstract: A method for inspecting a customized orthodontic aligner for manufacturing defects, the customized orthodontic aligner customized for a specific arch of a specific patient and a specific stage of orthodontic treatment, the method including obtaining images of the customized orthodontic aligner; identifying an identifier of the customized orthodontic aligner, determining a digital file based on the identifier, the digital file associated with the customized orthodontic aligner including a digital model of a mold used during manufacture of the customized orthodontic aligner, determining a intended property for the customized orthodontic aligner by digitally manipulating the digital model of the mold, determining an actual property of the customized orthodontic aligner from the images, determining whether there is a manufacturing defect in the customized orthodontic aligner by comparing the intended property with the actual property, outputting an output associated with the determination of whether there is a ma

Abstract: A slicing and printing method for colour 3D physical model with protective film is provided. The method executes a slicing process to colour 3D object data for generating multiple layers of object slice data and colour slice data, generate multiple layers of body slice data and multiple layers of protection slice data according to multiple layers of the object slice data, manufacture multiple layers of body slice physical models according to multiple layers of the body slice data, color each layer of the manufactured body slice physical model according to the same layer of the colour slice data, and use light-transmissive print materials to manufacture multiple layers of protection slice physical models according to multiple layers of the protection slice data. The method can effectively make the manufactured colour 3D physical model be with light-transmissive protective film, and prevent the colour 3D physical model from decolorization.

Abstract: A 3D slicing and printing method using strengthened auxiliary wall is provided. The method is to control a 3D printer (3) to retrieve multiple layers of object print data corresponding to a 3D object (90), and multiple layers of wall print data and raft print data, print multiple layers of raft slice physical models (400,60) on a print platform (307) layer by layer according to the raft print data, print multiple layers of wall slice physical models (420-421,80-81) on the printed raft slice physical models (400,60) layer by layer according to the wall print data, and print multiple layers of 3D slice physical models (50-53,70-71) layer by layer according to the object print data during printing the raft slice physical models (400,60) and the wall slice physical models (420-421,80-81). It can effectively prevent the auxiliary wall (42,8) from collapsing and failure of printing a whole 3D physical model (5,7) via making a raft structure (40,6) be arranged under the auxiliary wall (42,8).

Abstract: A protecting method for accessing material data adopted by a printer having a processing unit, a MCU for storing material data, and a transmission interface is disclosed. The method includes following steps of: determining whether to decide a data format at the processing unit once the material data is to be saved or read; generating confirm signal to be transmitted to the MCU through the transmission interface if the data format needs to be decided; looking up a table or performing a calculation according to content of the confirm signal at both the processing unit and the MCU for obtaining a corresponding data format; and, generating and transmitting transmission signal which includes the material data based on the corresponding data format by the processing unit and the MCU.

Abstract: A method of inwardly decreasing a coloring contour of a color 3D object includes: performing an object-slicing on a 3D object to generate records of object print-route information of printing layers; performing an image-slicing on the 3D object to generate records of color-printing information of the printing layers, wherein each color-printing information respectively involves an original coloring contour (3) of each printing layer; performing an inward decrease on the records of color-printing information to generate records of updated color-printing information, wherein each updated color-printing information involves an inwardly decreased coloring contour (4) of each printing layer, and the inwardly decreased coloring contour (4) is spaced from the original coloring contour (3) by an inwardly decreased distance (D); and causing a storage to store the records of object print-route information as route files, and storing the records of updated color-printing information as image files.

Abstract: Dental appliances, materials, and methods of forming such appliances and materials for improved laser marking are provided herein including the use of textured and/or roughened surfaces to enhance laser marking.

Abstract: A three-dimensional printing apparatus and a method for calibrating printing inaccuracy thereof are provided. A printing head of the three-dimensional printing apparatus is adapted for moving along a straight printing path on a datum plane and simultaneously feeding out forming material, so as to generate a layer object on a supporting surface of a platform. If a path distance of the straight printing path is greater than a threshold, a plurality of linear compensation relationships respectively corresponding to a plurality of first zones of the supporting surface are used for calculating a first compensation value of a starting point and a second compensation value of an ending point. If the path distance of the straight printing path is not greater than the threshold, a common compensation values is decided based on at least one of second zones and which is corresponding to the starting point and the ending point.

Abstract: A three-dimensional printing apparatus and a method of compensating a coordinate offset of a nozzle are provided. The method includes the following. A first nozzle and a second nozzle are controlled to print a testing three-dimensional object on a platform according to a calibration model. The testing three-dimensional object includes a plurality of correlation structures respectively corresponding to a plurality of compensation parameters, and each correlation structure includes a first sub-structure and a second sub-structure. The first sub-structure is formed of a first forming material, and the second sub-structure is formed of a second forming material. Through observing a joint level between the first sub-structure and the second sub-structure of each correlation structure, a best correlation structure, which is used for performing compensation on a printing coordinate of the first nozzle or the second nozzle, is selected from the correlation structures.

Abstract: A temperature control method of printing and a device thereof are provided, wherein the method and the device is adapted to a 3D printer which has a discharge nozzle. The control method includes the following steps. A temperature rule table is provided, and the temperature rule table is formed by a printing speed parameter and a discharge speed parameter of the 3D printer. At least one printing speed information and at least one discharge speed information are received. Corresponding temperature information is obtained from the temperature rule table according to the printing speed information and the discharge speed information. Further, a temperature of the discharge nozzle is adjusted according to the printing speed information, the discharge speed and the at least one temperature information.

Abstract: A method for quick configuration of Wi-Fi connection of output device is provided. The method includes following steps of: retrieving a plurality of access point data respectively corresponding to a plurality of Wi-Fi access points based on Wi-Fi protocol at a computer device; selecting one of the plurality of the access point data for generating a corresponded configuration data; establishing a heterogeneous connection with an output device based on a heterogeneous protocol; transferring the configuration data to the output device via the heterogeneous connection; and, establishing a Wi-Fi connection with the corresponded Wi-Fi access point based on Wi-Fi protocol according to the received configuration data at the output device. Therefore, the output device can be effectively connected to the designated Wi-Fi access point, the configuration of Wi-Fi connection can be simplified, and the configuration time can be reduced.

Abstract: A method for printing a model for a 3D printer includes: perform a slicing process on an outer-frame object for generating multiple slicing-route files of multiple printing layers; perform the slicing process on a modeling object for generating multiple inkjet graphic files of the multiple printing layers; print a slicing object of one printing layer according to corresponding one of the slicing-route files; perform a filling process to the inside of the printed slicing object; perform a coloring process on the inside of the printed slicing object according to one of the inkjet graphic files corresponding to the same printing layer; and re-execute the above printing steps until all the printing layers are printed. The inside of the 3D model is colored via the inkjet graphic files generated after processing on the modeling object generating the visual effect that the modeling object is accommodated within the 3D model.

Abstract: A calibration method for compensating a home position of a 3D printer is disclosed. According to a movement position of a movable mechanism of the 3D printer, a control voltage is provided to a microcontroller. The calibration method includes steps as follows. The movable mechanism moves in a home direction. It is to determine whether the microcontroller receives a first logic level signal which is transited according to the corresponding control voltage. If yes, the movable mechanism moves in a direction opposite to the home direction. It is to determine whether the microcontroller receives a second logic level signal which is transited according to the corresponding control voltage. If yes, the movable mechanism moves a compensation distance corresponding to a step compensation amount in the home direction. Therefore, the calibration method is provided to reduce circuit costs, simplify designs of control circuits, and accurately calibrate the home position.

Abstract: A 3D printing method using strengthened auxiliary wall is provided. The method is to control a 3D printer to retrieve multiple layers of object print data corresponding to a 3D object, and multiple layers of wall print data and raft print data, print multiple layers of raft slice physical models on a print platform layer by layer according to the raft print data, print multiple layers of wall slice physical models on the printed raft slice physical models layer by layer according to the wall print data, and print multiple layers of 3D slice physical models layer by layer according to the object print data during printing the raft slice physical models and the wall slice physical models. It can effectively prevent the auxiliary wall form collapsing and failure of printing a whole 3D physical model via making a raft structure be arranged under the auxiliary wall.

Abstract: A slicing and printing method for colour 3D physical model with protective film is provided. The method executes a slicing process to colour 3D object data for generating multiple layers of object slice data and colour slice data, generate multiple layers of body slice data and multiple layers of protection slice data according to multiple layers of the object slice data, manufacture multiple layers of body slice physical models according to multiple layers of the body slice data, color each layer of the manufactured body slice physical model according to the same layer of the colour slice data, and use light-transmissive print materials to manufacture multiple layers of protection slice physical models according to multiple layers of the protection slice data. The method can effectively make the manufactured colour 3D physical model be with light-transmissive protective film, and prevent the colour 3D physical model from decolorization.

Abstract: A 3D printing device including a printing platform, a printing head, a sensor and a controller is provided. The printing platform includes a carrying surface. The printing head is disposed above the printing platform. The sensor is disposed above the printing platform. The controller is coupled to the printing head and the sensor. The sensor is used for analyzing a first layer slicing data of a 3D object to obtain a printing range. The controller operates the sensor to sense a plurality of sensing points corresponding to the printing range on the carrying surface of the printing platform, so as to obtain a plurality of sensing parameters corresponding to the sensing points. The controller determines whether the printing platform is inclined according to the sensing parameters. If yes, the controller determines an object shape of a compensation object according to the printing range and the sensing parameters.

Abstract: An intermittent excitation apparatus of a 3D printer includes at least one guide, a drive rod, a movable seat, and a microcontroller. When the microcontroller controls a first motor in a non-excitation and non-rotation condition, the movable seat is fixed on the drive rod and the 3D printer performs a plane printing operation. When the microcontroller controls the first motor in an excitation and rotation condition, the movable seat moves along the drive rod. Therefore, it is to significantly reduce heat generated inside the first motor, decrease costs, and reduce the size of the 3D printer.

Abstract: A printing head module including a body, a feeding roller assembly and a feeding sensor is provided. The body includes a material-supplying channel and a nozzle connected to the material-supplying channel. The feeding roller assembly is disposed at the material-supplying channel to transmit the modeling material to the nozzle. The feeding sensor is disposed at the feeding roller assembly to detect whether the feeding roller assembly rotates. The feeding sensor is coupled to a control unit, such that the control unit generates a notice according to a detection result of the feeding sensor.

Abstract: A color three-dimensional printing method and a three-dimensional printing equipment are provided. A slicing processing is performed on a 3D model to obtain a printing path file and a plurality of inkjet images. A first layer controlling data in the printing path file is read, wherein the first layer controlling data records a plurality of printing position points and a plurality of inkjet position points. Movement of a printing head is controlled according to the printing position points, and the printing head is controlled to extrude a forming material, to establish a first layer object. A first inkjet image among the inkjet images is read. Movement of an inkjet head on a plane is controlled according to the inkjet position points, and the inkjet head is controlled to spray the ink on the first layer object according to the first inkjet image.