3d printing machine and manufacturing method

A manufacturing method for two or more objects or sub-parts with a multi-head additive manufacturing machine, wherein

• the multi-head additive manufacturing machine comprises:
• a first common guide aligned to a first direction;
• a second common guide aligned to a second direction;
• a multi-deposition unit comprising at least of a first deposition device and a second deposition device, wherein the first deposition device and the second deposition device are independently actuatable to provide different quantities of deposition material;
• and
• a multi-head unit (MHU) movable with respect to the first common guide and the second common guide and comprising at least a first motorized deposition head and a second motorized deposition heads movable with respect to one another along a third guide aligned to a third direction, the first direction, the second direction and the third direction defining a three-dimensional reference frame for deposition;
• wherein the first motorized deposition head and the second motorized deposition heads comprise a first opening and a second opening, respectively, wherein the deposition material is deposited through the first opening and the second opening, respectively;
• the manufacturing method comprising steps of:
• via an electronic control unit (ECU), receiving at least a discretized sequence of coordinate value sets within the three-dimensional reference frame representing pre-defined first and second deposition paths for the first motorized deposition head and the second motorized deposition head as a plurality of points;
• providing, via a pre-defined first deposition quantity information for the first motorized deposition head and a second deposition quantity information for the second motorized deposition head, each of the pre-defined first deposition quantity information and the second deposition quantity information being associated to the plurality of points, a pre-defined quantity of material to be deposited along the first and second deposition paths via the first opening and the second opening and a deposition system;
• and
• controlling predetermined movements within the three-dimensional reference frame of the first motorized deposition head and the second motorized deposition head along the third direction to implement the first and second deposition paths,
• wherein the first motorized deposition head and the second motorized deposition head are controlled with identical movements along the first direction and the second direction,
• wherein the coordinate values further include first position information along the third direction for the first motorized deposition head and second position information along the third direction for the second motorized deposition head such that, for at least a section of the discretized sequence where the first motorized deposition head and the second motorized deposition head simultaneously deposit, the first and second deposition paths describe a first segment and a second segment, wherein the first segment and the second segment are arbitrarily different, non-mirrored, non-replica, and the first segment and the second segment having, for a first span along the first direction and for a second span along the second direction, a corresponding first length associated to the first motorized deposition head and a corresponding second length associated to the second motorized deposition head so that a length of the first segment is different from a length of the second segment,
• the electronic control unit coordinating the first motorized deposition head and the second motorized deposition head by operating the actuators and the deposition system so that, when the first motorized deposition head and the second motorized deposition head simultaneously operate based on the section, each coordinate value set of the discretized sequence having identical coordinate values along the first direction and the second direction and different values along the third direction and for first deposition information and second deposition information, is simultaneously reached by the first motorized deposition head and the second motorized deposition head so that the first segment and the second segment are synchronously deposited over a same time interval by having a first travelling speed of the first motorized deposition head lower than a second travelling speed of the second motorized deposition head when the first segment is shorter than the second segment.