Abstract: A stereolithography machine includes: a tank with a bottom; a supporting unit associated with moving means configured to move it according to a direction of movement which is orthogonal to the bottom; a modelling plate having a modelling surface facing the bottom in order to support a three-dimensional object; a coupling unit suited to removably connect the modelling plate to the supporting unit and comprising a housing and a spherical body revolvingly arranged in the housing; releasable clamping means suited to be operated in such a way as to press the housing and the spherical body against each other so as to make them integral with each other and to make the modelling plate integral with the supporting unit.

Abstract: The invention is a stereolithography machine (1) comprising: a tank (2) with a bottom (2a); a supporting unit (5) associated with moving means (4) suited to move it according to a direction of movement (Z) which is orthogonal to the bottom (2a); a modelling plate (3) having a modelling surface (3a) facing the bottom (2a) in order to support a three-dimensional object; a coupling unit (6) suited to removably connect the modelling plate (3) to the supporting unit (5) and comprising a housing (7) and a spherical body (8) revolvingly arranged in the housing (7); releasable clamping means (9) suited to be operated in such a way as to press the housing (7) and the spherical body (8) against each other so as to make them integral with each other and to make the modelling plate (3) integral with the supporting unit (5).