3.1.6. Pre-Allocation of the Digital Models to the Manufacturing Means

Once the number of pieces to be printed has been reduced, it is necessary to assign which parts are printed with each 3D printer, depending on the need for resolution, or with the cutting machines, if they have laminar geometry. In order to reproduce very small pieces on a natural scale, photosensitive resin printing was used. This system has manufactured, among others, the connector of Subassembly 8 (one of the 14 pieces) due to the diameters of the pins. This analysis is performed for every part of each assembly. In Figure 8a the connector of the Subassembly 8 is exposed in context to the rest of the elements that form it and in Figure 8b a detail view of the connector.

**Figure 8.** (**a**) Connector of Subassembly 8 in relation to the rest of its pieces. (**b**) Detail view of the connector.

In Figure 9a the printed connectors of the Subassembly 8 are exposed and in Figure 9b they are presented in relation to another piece of the same subassembly, where their dimensions can be compared with those of a hand. The pins of these connectors have diameters of 0.8 mm and thickness of 0.1 mm.

**Figure 9.** (**a**) Subassembly 8 connectors. (**b**) Connector and printed piece of Subassembly 8.

In SO/PHI, laminar pieces have been made by CNC milling and laser cutting. The support base of all the instrumentation is made in CNC milling, while the steel mirrors of the instrument and the methacrylate showcase are manufactured with a laser cutting machine. Figure 10 shows its large dimensions and its flat morphology, characteristics that respond to the methods of traditional model making in architecture. The reinforcing bars of the structure are manufactured by means of aluminum rods to which the printed ends in 3D have been added.

**Figure 10.** (**a**) Plane of the instrument base. (**b**) Base of the instrument and reinforcement rods.
