@@ -5,27 +5,30 @@ The assignment for this week is create something that has been designed with par
### Designing on Fusion 360
I thought to design an object with living hinges and besides I wanted to use it as box. Therefore, my design will have 3 pieces.
Before to start with the design, the first to do is the parameters definition as a result we are going to create a parametric design which is very useful because we do not know the exact tolerance and changing it with only one number. Therefore, if you wanted to change your design is as simple as changing those numbers. The parameters were defined on Fusion 360 and it can be changed and showed immediately on the design. You can see what parameters I defined in the following picture:
Before to start with the design, I need to do the parameters definition so we are going to create a parametric design which is very useful because we do not know the exact tolerance and changing it with only one number. Therefore, if you wanted to change your design is as simple as changing those numbers. The parameters were defined on Fusion 360 and it can be changed and showed immediately on the design. You can see what parameters I defined in the following picture:
Then, I sketched a rectangle then I drew an arc using the arc command with the option _3-point arc_ . Here are two images to see the commands.
Afterwards, I created two rectangles that are going to be the finger-joints and here I defined the kerf which is the material lost in any type of cutting process. If we do not take in account the **kerf** then our pieces does not fit into each other. During the week we could determine that for our laser cutter the kerf is equal 0.15mm. So, the the width of these two rectangles were set up _thickness - kerf_.
Then, I used the extrude command to create one side of the box.
Afterwards, I created two rectangles that are going to be the finger-joints and here I defined the kerf which is the material lost in any type of cutting process. If we do not take in account the **kerf** then our pieces does not fit into each other. During the week we could determine that for our laser cutter the kerf is equal 0.15mm. It is important to mention that in my case the height of these two rectangles were set up _thickness + kerf_.
To create the other side I used the offset command and project the other side. For becoming in a 3D shape, I used the extrude.
Now, I need to create the arch. I projected one side with to sketch entities that allow me to use the flange command to complete all the arch. As a result, I got a solid that was defined as a new component.
I used the combine command for getting an arch with the finger-joints and then I used the unfold command to get the side where I sketched the **living higes**. At the same plane at the top of the arc, I created 3 lines with a gap by 6mm and under them I sketched 2 lines more with the same gap. Then, I measured the dimension of the side where I was creating the living hinges which is the hingeHeight (according the parameters) to 1change it and getting the actual thickness of each slat (slatthick in the parameters) which is equal 1.485mm. So, I went back to the sketch and used this measure in the sketch between the parallel lines. I used the mirror command ony for the first group of lines. To create all the living hinges I used the rectangular pattern, I selected the 5 lines and wrote the quantity and the distance, as you can see the following pictures:
I did not care about the other side because I am going to create it in the Rhino software next to the laser cutter.
After that, we got the living hinges.
Now, I need to create the arch and the sides and I sketched it in 3 parts. First, I did a rectangle and I cutted the sides which are the finger-joints.
Having drawn the main design, I started with the manufacture parameters using the manufacture option and Edit Manufacturing Model command. Then, I used the arrange command however first I drew a rectangule to put all the sketches on the rectangle. You can see in the following pictures how it works that command and the result:
The arch where I sketched the **living higes**. At the same plane at the top of the arc, I created 3 lines with a gap by 6mm and under them I sketched 2 lines more with the same gap. Then, The measure of the dimension from the sidearch is 141.372mm, I have got this value using the formula: 2*pi*R*Angle/360 -----> r=45mm; angle=180° Value=141.372mm.
So, I started to draw the 3 lines at the top of the rectangle and the 2 more lines under them. I used the mirror command ony for the first group of lines. To create all the living hinges I used the rectangular pattern, I selected the 5 lines and wrote the quantity and the distance, as you can see the following pictures:
Finally, I set up the cutting process with the new setup command to select all the pieces. Then, the 2D Profile command allows us to define the feed and the tool.
After that, we got the living hinges.
Finally, I drew the last rectangle cutting the finger-joints.
Afterwards, I exported the design in .DXF format to open it in the rhino software.
### Laser cutter
Here in the fab we have the Trotec Speedy400. It is a 1000x610mm 100W machine. This one was used in the group assignment. The trotec uses rhino and its own interface to send the file to cut. The software is basically used for importing files and assigning colors and layers.
...
...
@@ -54,8 +57,8 @@ It is important to mention that we did some tests with a standard template for 3
- Raster (med): 80 Power, 80 Speed, 1,000 PPI
- Raster (high): 90 Power, 80 Speed, 1,000 PPI
We have a datasheet on the right of the laser cutter.
/foto datasheet/
We have a datasheet on the right of the laser cutter. That will be used to cut our design.
Here we have a picture of the result of the 3 materials.
...
...
@@ -64,6 +67,7 @@ Here we have a picture of the result of the 3 materials.
1. Turning on the machine.
2. Loading the material.
photo
3. Setting focus and starting position for the laser.
...
...
@@ -73,42 +77,54 @@ Here we have a picture of the result of the 3 materials.
6. Opening the file with Rhino on the computer connected to the cutter.
7. Checking settings and dimensiones of the file to make sure that everything is fine.
8. Setting up colors/layers to control cut order and group things that need the same laser settings.
7. Checking settings and dimensiones of the file to make sure that everything is fine. This a picture of the final design made it in rhino.
Photo
8. Setting up colors/layers to control cut order and group things that need the same laser settings. I used The reed and blue.
Photo
9. Doing file -> Print to the cutter job control software.
10. Looking at the file in the job control software to make sure the dimensions are ok.
11. Setting up the proper cut order using colors/layers.
10. Looking at the file in the job control software to make sure the dimensions are ok. I recommend you to see the screen and the material on the machine.
photo
11. Setting up the proper cut order using colors/layers. Another important thing here is to do a small test cut It’s good to do a small test cut to verify that the speed, power, and frequency settings are appropriate for the material you are using. Having done the test I had to change my settings for the values from the polywood of 4mm.
Photo
12. Clicking on the run icon,
12. Clicking on the run icon.
It’s good to do a small test cut to verify that the speed, power, and frequency settings are appropriate for the material you are using.
<p><ahref="https://vimeo.com/771326580">LaserCutter</a> from <ahref="https://vimeo.com/user149551685">Angel Erazo</a> on <ahref="https://vimeo.com">Vimeo</a>.</p>
The final result is:
foto
### Vinyl cutter
Here in the FabLab we have two vinyl cutters, the Roland CAMM-1 and the Silhouette Cameo 3. The Roland has more power than the Silhouette and it is better for bigger cuts and figures. On the contrary, the Silhouette is easier to use, with a more intuitive software, and offers a really good resolution for small cuts. For this reason I decided to work with the Silhouette as I need to do really small cuts for my design.
poto machine
#### Sketching
I had some ideas in mind for my drawing but I decided to do my own logo. I sketched a dojo in Adobe Illustrator. I used de
I had some ideas in mind for my drawing but I decided to do my own logo. I sketched a dojo in Adobe Illustrator and inkscape.
PHOTO
PHOTO
#### Vinyl Cutter Workflow
1. Import .dxf file into cameo software.
2. Select material as Cardstock plain.
3. The tool is set to Pen.
4. I had to experiment with the force and speed and go through a set of tests, eventually I set the force - 7 , speed - 5
1. Import .dxf file into Silhouette Studio software.
2. Select material as Vynil Matte.
3. The tool is set to Cut.
4. I had to experiment with the force and speed and go through a set of tests, eventually I set the force 10 , speed 5 ands passes 1
PHOTO
5. Make sure the tip of the pen is not too soft as it might bend under pressure.
6. The file should contain only vectors.
7. As I wanted to use 2 different colours, I had make seperate files for each and make sure to have the same origin.
8. I used to sticky mat to hold my cardsheet in place.
9. Feed the mat to the vinyl cutter through the rollers using the sticker indicator as a reference.
10. Set the origin by pressing the "Origin" button on the control panel.
7. Testing the setting If you can take the material off easily is ok and you can start. You can see a image of my testing.
8. Set the origin by pressing the "Origin" button on the control panel.
<p><ahref="https://vimeo.com/771326650">VinylCutter</a> from <ahref="https://vimeo.com/user149551685">Angel Erazo</a> on <ahref="https://vimeo.com">Vimeo</a>.</p>
Then, I took the part of the square off, you have a picture of it:
To transfer the sticker to my laptop I used a sticky tape to avoid damage.
The final result:
...
...
@@ -118,11 +134,6 @@ Here is the [link](https://fabacademy.org/2022/labs/barcelona/students/barcelona
