A three-dimensional selective repairing system, which is for selectively repairing an area of an unrepaired element by sintering, includes a scanning device, a comparing device, a spraying device and a sintering device. The scanning device is for scanning the area to obtain a repairing data. The comparing device is connected to the scanning device to receive the repairing data and produce a repairing parameter. The spraying device is controlled by the repairing parameter and includes an electrostatic generator which sprays a plurality of electrified pulverulent bodies through the electrostatic generator to form an electrified pulverulent film on a medium covered on the area. The sintering device is controlled by the repairing parameter to provide a power beam to selectively heat the electrified pulverulent film. The electrified pulverulent film melted or sintered to form a solid mass on the area.

Described herein are electrochemical-additive manufacturing methods and systems using such methods. A method comprises depositing a material onto a deposition electrode by flowing a current between that deposition electrode and each of multiple individually-addressable electrodes, forming an electrode array. These currents are independently controlled based on a target map and using deposition control circuits, each coupled to one individually-addressable electrode. The target map is generated by a system controller based on various characteristics of the system (e.g., the performance of each deposition control circuit and/or individually-addressable electrode, electrolyte composition) and the desired characteristics of the deposited material (e.g., deposition location, uniformity, morphology). Furthermore, when the deposition electrode and the electrode array move relative to each other, the system controller dynamically updates the target map based on their relative positions. This movement can provide a fresh electrolyte between the electrodes and enable deposition at new locations.

A slicer in a material drop ejecting three-dimensional (3D) object printer generates machine ready instructions that operate components of a printer, such as actuators and an ejector having at least one nozzle, to form features of an object more precisely than previously known. The instructions generated by the slicer use positional data from an encoder to control the actuators to move the ejector and a platform on which the object is formed relative to one another to form edges of the feature.

A slicer in a material drop ejecting three-dimensional (3D) object printer generates machine ready instructions that operate components of a printer, such as actuators and an ejector having at least one nozzle, to form features of an object more precisely than previously known. The instructions generated by the slicer use positional data from an encoder to control the actuators to move the ejector and a platform on which the object is formed relative to one another to form edges of the feature.

A multi-material three-dimensional printing apparatus is provided. The provided apparatus includes two or more print stations. Each of the print stations includes a substrate, a transportation device, a dispersion device, a compaction device, a printing device, a fixing device, and a fluidized materials removal device. The apparatus also includes an assembly apparatus in communication with the two or more print stations via the transportation device. The apparatus also includes one or more transfer devices in communication with the assembly apparatus. The apparatus also includes a computing and controlling device configured to control the operations of the two or more print stations, the assembly apparatus and the one or more transfer devices.

A method and an apparatus of a powder bed fusion additive manufacturing system that enables a quick change in the optical beam delivery size and intensity across locations of a print surface for different powdered materials while ensuring high availability of the system. A dynamic optical assembly containing a set of lens assemblies of different magnification ratios and a mechanical assembly may change the magnification ratios as needed. The dynamic optical assembly may include a transitional and rotational position control of the optics to minimize variations of the optical beam sizes across the print surface.

A method and an apparatus of a powder bed fusion additive manufacturing system that enables a quick change in the optical beam delivery size and intensity across locations of a print surface for different powdered materials while ensuring high availability of the system. A dynamic optical assembly containing a set of lens assemblies of different magnification ratios and a mechanical assembly may change the magnification ratios as needed. The dynamic optical assembly may include a transitional and rotational position control of the optics to minimize variations of the optical beam sizes across the print surface.

Aspects described herein provide a method including: receiving layer data for a part to be additively manufactured, wherein the layer data comprises a plurality of deposition locations; for each respective deposition location of the plurality of deposition locations: determining a surface normal vector for with the respective deposition location; determining a direction of travel vector based on the respective deposition location and at least one other deposition location of the plurality of deposition locations; determining a tool vector for the respective deposition location based on the direction of travel vector for the respective deposition location and the surface normal vector for with the respective deposition location; manipulating a movable element of the additive manufacturing machine to align with the tool vector for the respective deposition location; and depositing material of the part at the respective deposition location.

Aspects described herein provide a method including: receiving layer data for a part to be additively manufactured, wherein the layer data comprises a plurality of deposition locations; for each respective deposition location of the plurality of deposition locations: determining a surface normal vector for with the respective deposition location; determining a direction of travel vector based on the respective deposition location and at least one other deposition location of the plurality of deposition locations; determining a tool vector for the respective deposition location based on the direction of travel vector for the respective deposition location and the surface normal vector for with the respective deposition location; manipulating a movable element of the additive manufacturing machine to align with the tool vector for the respective deposition location; and depositing material of the part at the respective deposition location.

A three-dimensional shaping apparatus includes a plasticizing portion plasticizing a material to generate a shaping material, a nozzle having a discharge port discharging the shaping material toward a table, a movement mechanism changing a relative position between the nozzle and the table, a discharge control mechanism provided in a flow path which connects the plasticizing portion to the nozzle and controlling a discharge amount of the shaping material from the nozzle, and a control portion controlling the plasticizing portion, the movement mechanism, and the discharge control mechanism to shape the three-dimensional shaping object. The control portion controls the discharge control mechanism so that when a relative movement speed between the nozzle and the table is a first speed, the discharge amount of the shaping material is set to a first discharge amount, and when the relative movement speed between the nozzle and the table is a second speed which is slower than the first speed, the discharge amount of the shaping material is set to a second discharge amount which is smaller than the first discharge amount.