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-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.

Abstract: A three-dimensional (3-D) printing apparatus and an inkjet coloring method thereof are provided. The 3-D printing apparatus includes a platform, a three-dimensional printing head, an inkjet head and the method includes following steps. A layer thickness of at least one layer object forming a 3-D object is obtained. An ink discharge volume of an ink layer is adjusted according to the layer thickness, wherein the ink discharge volume is in positive correlation with the layer thickness. A building material is melted and printed out on the platform according to the layer thickness by the three-dimensional printing head to form the at last one layer object. Ink is dispensed on the at last one layer object according to the adjusted ink discharge volume by the inkjet head to form the ink layer.

Abstract: A 3D printing device and a printing correction method are provided. The 3D printing device includes a printing nozzle, a printing platform and a controller. The printing nozzle is controlled to move on the movement plane. The printing platform includes a first tilt sensor to sense a tilting state of the printing platform. The controller is coupled to the first tilt sensor. The printing correction method adapted to the 3D printing device includes following steps: sensing the tilting state of the printing platform; controlling the printing nozzle to be depressed in a first position on the printing platform to change the tilting state of the printing platform; and, correcting the relative position of the print platform with the movement plane by the first position and the changes of tilting state of the printing platform sensed by the tilt sensor.

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: The invention provides a 3-D printing method including: providing a liquid-state forming material in a 3-D printing apparatus; detecting a temperature of the liquid-state forming material; and adjusting corresponding curing parameters according to the temperature and curing characteristics of the liquid-state forming material to cure the liquid-state forming material layer by layer, so as to form and stack multiple cured layers to form a 3-D object. The invention can ensure consistency of a molded object printed by the 3-D printing apparatus using the liquid-state forming material and thus, solve the issue of inconsistent quality occurring to the molded object printed by the 3-D printing apparatus using the liquid-state forming material due to the curing speed of the liquid-state forming material varying with temperatures.

Abstract: A three-dimensional printing apparatus and a three-dimensional printing method are provided. The three-dimensional printing apparatus includes a tank, an injection module, a platform movably disposed above the bottom of the tank, a curing module, and a control module. The tank has a forming area and a separating area in a stepped manner on a bottom thereof, and the forming area is higher than the separating area. The injection module includes a storage tank and an injection pipe connected thereto, and a forming material is filled therein to be applied to the forming area. The curing module is disposed beside the tank or the platform to cure the forming material between the platform and the forming area to be a curing layer. The control module is electrically connected to the injection module, the curing module, and at least one of the tank and the platform to perform a relative movement.

Abstract: A joint structure includes a joint hollow body having a first plate and a second plate arranged opposite to each other, and the second plate has a penetrating hole for defining an axial direction with respect to the penetrating hole, and an external side plate is extended in the defined axial direction from the external periphery of the first plate and connected to the external periphery of the second plate, so as to enhance the structural strength of the joint hollow body and prevent the joint hollow body from having concentrated stress or being cracked easily.

Abstract: A 3D printing filament feeding apparatus for feeding a filament (10) includes a primary driving wheel (100), a secondary driven wheel (300), a measurement scale rotating disk (400), an optical sensor (500) and a cleaning assembly (600). The primary driving wheel (100) is connected to a power source (200) and driven thereby to rotate. The secondary driven wheel (300) is arranged adjacent to and parallel with the primary driving wheel (100). The measurement scale rotating disk (400) includes scale structures (410) and rotates together with the secondary driven wheel (300). The optical sensor (500) detects the scale structures (410). The cleaning assembly (600) engages with the scale structures (410); wherein the secondary driven wheel (300) engages with the filament (10) and rotates along a driven direction (D) together therewith such that the scale structures (410) passes through the cleaning assembly (600), followed by detection of the optical sensor (500).

Abstract: The invention relates to a 3-D printing apparatus including a tank, a platform, a fixture, a solidifying module and a control module. The tank is flexible and filled with a liquid-state forming material. The platform is disposed in the tank. The control module drives the fixture to deform the tank, so as to form a first gap between the platform and a bottom of the tank for the liquid-state forming material to flow in. The solidifying module in controlled by the control module to solidify the liquid-state forming material between the platform and the bottom of the tank, so as to form a solidified layer. The invention can effectively reduce a processing time for manufacturing each solidified layer, such that an overall processing time can be reduced to achieve preferable molding efficiency.

Abstract: A method for adjusting a printing head usage amount of a 3D printer and a control device are provided. The method is adapted to control the control device of the 3D printer. The method includes following steps. At least one printing head of the 3D printer is divided into a plurality of sections. An accumulated printing point number of each of the sections is obtained. At least one specific section used for printing a 3D object is selected from the sections according to the accumulated printing point number of each of the sections. The method for adjusting the printing head usage amount of the 3D printer and the control device can avoid excessively high usage amount of some nozzles.

Abstract: A sensing device of a three dimensional object being printed is provided. The sensing device includes a roller, a ring shape equipment, a sensor, and a processor. The roller is utilized to perform planarization of the 3D printing object. The ring shape equipment has the same axial as the roller and rotates with the roller. The sensor is utilized to detect rotational speed of the ring shape equipment. The processor determines whether the roller is in contact with the 3D printing object according to the rotational speed of the ring shape equipment. Thereby, contact between the roller and the 3D printing object may be determined without disposed sensor on the roller.

Abstract: A printing head module for a 3-D printing apparatus includes a 3-D print head, an ink-jet print head and a baking module. The 3-D print head includes a melting module and a base-material nozzle to print a plurality of staking layers. The ink-jet print head is connected to the 3-D print head and includes an ink nozzle to dispense ink on each stacking layer. The baking module is disposed between the 3-D print head and the ink-jet print head and includes a fan, a discharge casing and a heating module. The fan includes an air-discharge side facing the base to provide an air flow. The discharge casing is disposed on the air-discharge side. The heating module is disposed between the fan and the discharge casing to heat the air flow and the heated air flow being blown out via the discharge casing for drying the ink layer.

Abstract: A three-dimensional (3D) printing apparatus includes a tank containing a forming material in liquid, a platform dipped into or moved away the forming material, a curing device disposed besides the tank or the platform, and a control device electrically connected to at least one of the tank and the platform and the curing device. An inner bottom of the tank includes a forming area and a peeling area in a stepped shape, and the forming area is higher than the peeling area. A 3D printing method includes providing the 3D printing apparatus, then the liquid-state forming material between the platform and the forming area is cured to form a solidification layer. Afterwards, a position and an occupied proportion of the solidification layer corresponding to the inner bottom, and a movement range of a relative movement is determined according thereto so as to completely peel off the solidification layer.

Abstract: A three-dimensional printing apparatus including a body, a rotation module, a tank, an elevating module, a forming platform, a curing module, and a control module is provided. The rotation module and the elevating module are disposed on the body. The tank is disposed on the rotation module. The forming platform is disposed on the elevating module. The curing module disposed in the body and under the tank. The control module is electrically connected to the rotation module, the elevating module, and the curing module. The forming platform dips into the forming material in liquid in the tank and the curing module cures the forming material between the forming platform and an inner bottom of the tank to form a solidification layer. Then the elevating module and the rotation module respectively drive the forming platform to rise and rotate relatively to the tank simultaneously.

Abstract: A nozzle cleaning module including a base housing, a main carrier, a sub-carrier, a driving assembly and an interference structure is provided. The main carrier is received in the base housing, a wiper protrudes upwardly from the main carrier, and the main carrier has a sub-slope. The sub-carrier is received in the main carrier, a cover protrudes upwardly from the sub-carrier, and at least a portion of the sub-carrier is in contact with the sub-slope. The driving assembly is connected to the main carrier and obliquely lifts the main carrier in relation to the base housing to lift the wiper. The sub-carrier moves along with the main carrier at the same time. The interference structure is arranged corresponding to the sub-carrier to move the sub-carrier along the sub-slope, so the cover can be raised.

Abstract: A method of slicing and printing multi-color 3D object includes following steps of: executing a path-slicing process to a coordinate information of a multi-color 3D object (22) to generate a plurality of path data; generating a plurality of continuous-tone images according to a color information of the multi-color 3D object (22); calculating a plurality of dithering masks according to a plurality of displacement values and an initial mask; generating a plurality of halftone images according to each dithering mask and the same-layer continuous tone image; and, controlling a modeling nozzle (100) of a multi-color 3D printer (1) to print a plurality of printing slices (S1-S3) according to each path data layer by layer and controlling a coloring nozzle (102) of the multi-color 3D printer (1) to color each of printed printing slice (S1-S3) according to the same-layer halftone image.

Abstract: A three dimensional printing apparatus including a tank containing a liquid forming material, a platform movably disposed in the tank to be immersed in or moved out of the liquid forming material, a curing device disposed next to the tank or the platform, and a controlling device electrically connected to the curing device and at least one of the tank and the platform is provided. An inner bottom of the tank has a first portion and a second portion in step manner, the first portion is higher than the second portion. The controlling device drives the tank and the platform to move relative to each other. A solidified layer is formed by curing the liquid forming material between the platform and the first portion and peeled off by rotating the tank relative to the platform. A three dimensional printing method is also disclosed.

Abstract: A method of slicing and printing multi-color 3D object is provided. The method includes following steps of: loading a coordinate information and a color information of a multi-color 3D object; executing a slicing process to generate a plurality of object printing slices and a plurality of object images; generating a plurality of pollution-blocking printing slices and making each pollution-blocking printing slice partially overlap an edge of the same-layer object printing slice; controlling a modeling nozzle of a multi-color 3D printer to print the object printing slices layer by layer, printing each pollution-blocking printing slice partially overlapping the same-layer object printing slice after the same-layer object printing slice is printed, and controlling a coloring nozzle of the multi-color 3D printer to color each of printed object printing slice after the same-layer pollution-blocking printing slice is printed.