Additive manufacturing system

An additive manufacturing system comprising:

• an additive manufacturer configured to manufacture an object by adding a material melted by radiation of a beam to a workpiece;
• and
• an information processor configured to communicate with the additive manufacturer, wherein
• the information processor includes:
• first processing circuitry configured
• to acquire an image of a molten pool formed on the workpiece and information on a progress direction of a machining point on the workpiece;
• to extract a contour of the molten pool;
• to set a rectangle that circumscribes an extracted contour;
• to obtain a plurality of end points of the molten pool based on the image and the progress direction, the end points being respective different contact points between the set rectangle circumscribing the extracted contour and the extracted contour of the molten pool, where opposite long sides of the set rectangle are aligned with the progress direction;
• to calculate a width of the molten pool based on position information regarding the plurality of end points;
• and
• to calculate a center position of the molten pool based on the position information regarding the plurality of end points and a calculation result of the width of the molten pool, and
• the additive manufacturer includes:
• second processing circuitry configured
• to adjust a machining parameter of the additive manufacturer using the calculation result of the width of the molten pool such that the molten pool having a width matching a target value of the width of the molten pool is formed;
• and
• to correct a position of the machining point using the calculation result of the center position of the molten pool such that the molten pool having a center position matching a plurality of program command positions that are based on a machining program is formed, and
• by analyzing the machining program, to generate and output to the first processing circuitry the plurality of the program command positions including a current program command position, and a past program command position upstream of the current program command position on a machining path that is a path of the machining point, and to generate and output to the first processing circuitry the information on the progress direction at each of the plurality of the program command positions including a current progress direction of the current program command position and a past progress direction of the past program command position, wherein
• the first processing circuitry is configured to obtain, using information about each of the plurality of the program command positions, including the program command matching the calculation result of the center position and the information on the progress direction at each of the plurality of the program command positions, the plurality of end points corresponding to each of the plurality of program command positions, the plurality of program command positions including the current program command position and the past program command position indicated by information input to the first processing circuitry, and the information on the progress direction includes the current progress direction at the current program command position and the past progress direction at the past program command position indicated by information input to the first processing circuitry, and
• the first processing circuitry is configured to calculate the center position of the molten pool and the width of the molten pool using information regarding the plurality of end points corresponding to one or more of the plurality of program command positions.