The system for preparing a 3D printer printout base characterized in that on the printer table (1) at least three base points (2) are located, which are connected with each other by an electric wire (3), which connects to (head 5) nozzle (4) by a power supply (6), creating a contact detection circuit (7). The head (5) is connected sequentially with the head (5) drive (8), head (5) controller (9) and printer controller (10) and the printer controller (10) is equipped with a coordinate recorder (11) and a memory (12). The contact detection circuit (7) is connected by a potential signalling line (13) with the printer recorder (11) or the contact detection circuit (7) is equipped with an element (14) detecting current flow connected by a line (15) with the printer recorder (11), and the printer table (1) is connected with the table drive (16), table drive controller (17) and printer controller (11).The upper surface of table (1) and the surface of the base points (2) form a uniform plane. The method of preparing a 3D printer printout base characterised by the measurement of the location of the printer table (1) being conducted in the vertical axis "Z" with the established locations of the printer head in the "X", "Y" plane over at least 3 base points (2), and in the moment the contact detection circuit (7) is closed the "X, Y, Z" coordinates are stored in the printer memory, and based on the obtained coordinates describing the table surface, the printout base (18) is printed, that is, the raft.
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