Fab Academy 2017

Students

Machine assignment

INTRODUCTION

In the Mechanical Design, we apply a modular machine configuration. Join motors in it's head is the the principal idea, with electronic machine components. The purpose is to adapt this part of any structure and to change the size of the machine for any project.

In the head, you can put something components like laser, spindle, extruder, etc. You can considerate as variable. And another variable is adaptable size, changing guides can modify the work space for your project machine.

This project is the basic machine for students uses in their finals projects: Farmbot, Laser machine, 3D ceramic printer, Ceramic injection CNC and automatized wheelchair.

CONCEPT

We take the size problem of CNC machine and we work in this area. In the design, we make a brainstorming and all collaborate whit the problems and the solutions of the project.

The idea is to integrate all the stepper motors system movement on head, and the electronic control.

Is constituted by: three stepper motors, part of electronic control and tools that each student uses in your final project, the stepper motors are voltage: 4.2V, current: 1.5A, Step angle 1.8 grades and torque 5.5 Kg*cm, the control electronic make Raspberry Pi, Gestalt, Arduino and stepper shield, the axes are constituted for two steel tubes for guide and one threaded rod for the movement and to vary size chance the guides tubes.

More information of the process

Electronic

We tested the stepper motors of axes x, y and z using Arduino mega, CNC shield and Arduino uno.Here Performed the test it created a shield of coupling between Arduino mega and CNC shield Here Also make a Fabnet, To replace of Arduino, try a mechanize gestalt nodes, but could not complete for do not have somethings electronics components described here, the acquisition of gestalt nodes is done and we are waiting for them.

Softwware and Architecture

The graphic interface between user and machine is Raspberry Pi board, it is responsible to items positioning and variable state verification and we experiment with DC motor, the experimentation was to learn how to it works a spindle it can be use in CNC machine with a spindle.

All the information for the experimentation of DC motor you can find here and the investigation of the Raspberry Pi Board find them here.

Design and Mechanical

The design was based in change the idea of conventional machine CNC, our idea is integrated all the elements in the head of the machine, base in fractal theory.Information and In the mechanical design, we take the need a variation of the area work break paradigms of a predetermined work area giving property adjust the size to the user need. prototyped.







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