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OBJECTIVE

- Learn about wood joints
- Build a structure with wood joints

PROCEDURE

1. I wanted to relate this assignment with my final project
2. I thought that my final project's wood joints were too simple for this assignment; therefore I chose to do another thing this time
3. I decided to build a desk that could be used for the assignment of Make Something Big
4. Here is my sketch


5. I searched the main types of wood joints, because I was driven to include them all. This is the main link I used: WOOD JOINTS
6. I designed my drawing in Inventor
7. As I didn't know what my cartboard's thickness  was going to be, so I used a wooden piece's thickness (5 mm), I cutted in the Pre-Fab Academy, as a reference.
8. I determined the lines I would have to change if the referential thickness was not right.
9. When I went to mhy Fab center, I found that the wooden piece's thickness was 4mm; therefore, I changed it.
10. I exported my designs to Rhinoceros
11. I cutted my designs with a 40% Speed, 90% Power and 2356Hz Frequency.  By the way, Ricardo taught me that it was better to keep power under 90, because it could cause fire and increase the Frequency up to 5000Hz for acrylic. I used a solid metal piece for stopping the cartboard from folding.


13. Here are my parts after assembly


CONCLUSIONS

1. Narrow cartboard pieces are weak
2. Too much weight at both sides of a structure can cause it to fall instead of balance its weight.
3. It is really important that the dovetail joints should have trapezoid shapes.
4. After experimenting with cartboard joints, I realized that I could have applied them to my final project...they were not that simple.

AFTERWARDS

I talked with Miguel, a Mechanical Technician at TECSUP about ways for improving my final project design according to my observations in Step 2. These were the results:

1. For strengthen the 3D Printer part of my final project while using hinges, I can make some holes in my blocks and put removable pins.
2. For completely folding my machine I can increase the height of the wall below the 3D Printer part.
3. If I use a small valve with a tube, my container can be at the same level of my machine.
4. My blocks can have half their actual height and some sliders below (to make it movable)
5. My Y-axis can be folded like a 2D Printer top part, instead of going out of the structure.
6. An L-zone shape is compulsory for filling the entire square zone of my machine.

FURTHER WORK: OBJECTIVE

I will design my final project with a structure at a 300 mm scale for making it more easy to work with, using joints.

1. I will search for more types of press fits now that I have watched how other people did the assignment in the Fab Latin America network.
2. I will try apply as many press fits to my final project new design while caring about its efficiency.
3. I will cut my new design.

FURTHERWORK: PROCESS

DESIGN
1. I observed the fitting-ins of Luis Peña's final project and I realized that once you put them in, you could not put them out.


2. I decided to adapt this fitting-ins to final project and began measuring the lengths of another machine's fitting-ins with a pencil and a ruler.


3. Then, I applied Cross Multiplication