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4 MECHANICAL DESIGN
The system with which the "Food Scanner" works consists of the use of gears mainly. The system was designed, manufactured and built on a rotating base and a small carriage that travels along a path of circumference, and that is displaced by a channel (pocket).
The rotating base has a system consisting of two gears. Both have different diameters to maximize engine strength. The design was realized in Autodesk Inventor, with the simulator of gears own of the program. The smaller diameter gear was coupled to the bypass motor, and the larger diameter gear to the turntable or base with a coupling that works as a run. Both gears were designed so that they are located tangentially to the pitch tooth, and these exercise movement or rotation.
The car that transports the cell phone, travels a path of quarter of circumference. This route is traced by a channel that was designed as a cajeado. The cart enters only its rims inside the cajeado achieving the movement route.
In order to achieve the movement of the cart, a coupling was designed in the drive motor located at the beginning of the circumference, which is attached to a GT2 belt which is located in the shape of the channel path. For this use pulleys or gears designed by the team, 4 in total, dispersed throughout the path. It is important to note that elastic straps were used to keep the GT2 belt taut.