We will use an export program -Cura, for example- in order to transform the 3d design from STL format into GCode, the one the printer will be able to interpret and print layer by layer.

The filament -PLA, ABS, Filaflex, etc.- will be press from the extruder to the hotend. where will be heated until reaching fusion temperatures.

From the GCode (CNC code) will start the fabrication of the piece layer by layer, which height will depend of the configuration and the features of the 3D printer.

Depending on the toughness we are looking on the piece we can print it hollow inside or tracing different weaves. Doing so we can choose the density of the piece.

With this system there may be a limitation, the incapacity of printing pieces which corbel is too pronounced, because due to gravity the material has no time to cool and solidify and it is deformed.

This problem has been solved with the BCN3D Sigma and its independent dual extrusion system, which allows it to print with two materials for manufacturing supports. We must highlight the PVA as a soluble material for the support printing


Use an export program -Creation workshop- in order to transform the file of the piece from STL format into GCode, the one the printer will be able to interpret and print layer by layer.


The projector placed on the lower part of the machine acts as a slideshow would: the part of the layer that has to be manufactured is projected in white light, and the one that has not to in black -absence of light-.

The working block descends inside the tray until reaching the layer height between its base and the bottom of the tray -between 0.025 and 0.1 mm-.


The light is projected on the photosensitive resin which will harden because of the presence of ultraviolet light, fabricating the layer.


The layer sticks to the base of the construction block which surface is adherent -wrinkled on a small scale-, that ascends in order to descend again to a layer level for the next projection.

This process is repeated for the print of every layer until the piece will be completed.



The laser cutting technology starts with a tube whose content consists mainly of CO2.

From one end of the tube a stream of 0 is modulated to 50,000 watts, which will cause the agitation of atoms of CO2, causing electrons gradually increase their speed and bounce on a mirror located at the same end of the tube.

At the other end there will be a polarizing filter that only allows the passage of electrons directed to it in a completely perpendicular way.


The emergent ray -of 0.6 mm in diameter- is reflected by a fixed mirror placed at an angle of 45 ° on the Y axis. That beam will bounce in a second mirror located on the X axis, projecting towards a last mirror -Z axis-.


The beam will pass through a converging lens that will concentrate it to make it a point where it reaches its highest level. This will be the point of intersection of the workpiece.