Da Vinci Siege Defence Design
grabcad
Leonardo da Vinci was an army engineer who created innovative systems for military purposes. One of his designs can be found at http://www.leonardoda-vinci.org/Siege-Defenses-2.html. In 3D printing, the filament used is PLA, with a siege wall resolution layer of 0.2mm and other parts at 0.1mm. The support type only touches the bed, avoiding grid to speed up the process. Support is not essential for printing siege walls.
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