Method of detecting process irregularities by means of volume image data of the manufactured object

A system for detecting a particular process irregularity in an additively manufactured object, comprising:

• x) a detection system for acquiring volume image data of a volume of the object;
• y) a comparison unit which in operation compares the volume image data with a number of characteristic data each referring to a selected process irregularity, the characteristic data having been derived in a process of training a detection system that is able to acquire volume image data in an additively manufactured object for detecting process irregularities;
• and
• z) an output unit for outputting an information referring to the particular process irregularity in a finding location of the object if the volume image data in that finding location match the characteristic data of that particular process irregularity,
• wherein the process of training the detection system that is able to acquire volume image data in the additively manufactured object for the detection of process irregularities comprises the steps of:
• a) receiving process irregularity data referring to a selected location within an additively manufactured reference object where a predefined process irregularity occurred during the additive manufacture of the object;
• b) acquiring volume image data of a volume of the reference object comprising at least the selected location by the detection system;
• c) identifying within the volume image data characteristic data representing a difference between the volume image data of the selected location compared to the volume image data of at least one other location of the reference object and/or of a number of other additively manufactured objects in which in at least one other location no process irregularity has occurred and/or no process irregularity is suspected;
• and
• d) assigning to the predefined process irregularity the characteristic data as a representative of the predefined process irregularity.