Week 12 - OSCAR CELA - Fab Academy documentation

Week 12 – My Individual Contribution

This assignment was developed as a team project. The complete group documentation can be found at: Fab Lab León – Week 12 Group Project .

During week 12, my individual contribution to the group project focused on CAD design, 2D design, 3D design, and programming.

1. CAD Design

I participated in the CAD development of the machine, adapting the concept into real parts ready to fabricate and assemble. One of my main contributions was the design and improvement of the Z axis structure, checking dimensions, alignment, and mechanical integration.

Planning and CAD development — Planning and design stage of the machine development.

Initial Z axis mock-up — Initial mock-up used to define dimensions and alignment of the Z axis.

2. 2D Design

I also worked on the 2D design of structural parts for fabrication. These flat geometries were prepared for cutting and later assembly. The objective was to ensure dimensional precision and correct fit between components.

2D laser cut design — 2D laser-cut design used for machine structural parts.

Final machine structure showing the assembled mechanical system.

3. 3D Design

I contributed to the 3D design of custom mechanical parts, mainly related to the Z axis. After testing an initial version, I helped redesign stronger supports and reinforcement parts to improve rigidity and machine performance.

First Z axis test made with thinner material to evaluate stability.

Improved Z axis design using stronger material and better support.

Support bearings — Additional support and bearing system to increase rigidity and smooth movement.

4. Programming

I was responsible for the programming and machine control process using GRBL and UGS (Universal G-code Sender). I prepared and tested movement routines to validate the coordinated motion of the X, Y, and Z axes.

I also worked on calibration tests and G-code execution to verify the final behavior of the machine.

UGS software used to control the machine and send commands.

Machine connection — Connection between the computer and the machine through UGS.

Calibration process to improve movement accuracy on all axes.

In summary, my individual contribution during week 12 focused on mechanical design, structural development, custom 3D parts, and machine programming using GRBL and G-code.