Method for controlling the activity of at least two light radiation sources belonging to a stereolithography machine

An apparatus for controlling the activity of two light radiation sources (2, 3) of a stereolithography machine (1) and suited to act at the level of a portion (104) of a superimposition area (101) defined on the work surface (100) of said stereolithography machine (1) for making a three-dimensional object (200) through stereolithography, of the type comprising:

• a calculator comprising a processing unit and a memory support suited to be accessed by said processing unit;
• means suited to acquire a first set of data representative of the geometry of said three-dimensional object (200) and to upload the first set of data into said memory support;
• means suited to subdivide said three-dimensional object (200) into a plurality of layers (201);
• means suited to define the position of each one of said layers (201) on said work surface (100);
• means suited to identify, within said portion (104) of said superimposition area (101), each one of a plurality of lines (210) with generic length L defining each one of said layers (201);
• means suited to define, for each one of said lines (210) with generic length L, said value of said length X of said first section (211) within the interval 0<=X<=L;
• means suited to calculate, for each one of said lines (210) with generic length L, the length of said second section (212);
• means suited to generate the data relating to said activation of said two light radiation sources (2, 3) in such a way that a first one of said two light radiation sources (2) is activated along said first section (211) of each one of said lines (210), and the second one of said two light radiation sources (3) is activated along said remaining second section (212);
• characterized in that said means suited to define said value of said length X of said first section (211) are means for the generation of random numbers within an interval 0<=X<=L.

A computer program product comprising a data support provided with program portions configured in such a way that, when executed on a calculator comprising a processing unit and a memory support accessible by said processing unit, said program portions define:

• a calculator comprising a processing unit and a memory support accessible by said processing unit;
• means suited to acquire a first set of data representative of the geometry of said three-dimensional object (200) and to upload it into said memory support;
• means suited to subdivide said three-dimensional object (200) into a plurality of layers (201);
• means suited to define a position of each one of said layers (201) on said work surface (100);
• means suited to identify, within a portion (104) of a superimposition area (101), each one of a plurality of lines (210) with generic length L defining each one of said layers (201);
• means suited to define, for each one of said lines (210) with generic length L, a value of length X of a first section (211) within an interval 0<=X<=L;
• means suited to calculate, for each one of said lines (210) with generic length L, a length of a second section (212);
• means suited to generate data relating to activation of two light radiation sources (2, 3) in such a way that a first one of said two light radiation sources (2) is activated along said first section (211) of each one of said lines (210), and the second one of said two light radiation sources (3) is activated along said remaining second section (212);
• characterized in that said means suited to define said value of said length X of said first section (211) are means suited to generate random numbers within the interval 0<=X<=L.