group 3 updates - lonnie, angel, ximena

docs/assignments/week03/group-project/week03-group-project.md

@@ -70,16 +70,115 @@ The first group had already changed the colors of the lines to make firs the ras
 
 We did not test the engraving that should be only marcking the surface of the material and we thought that  if we just double the speed of the cut would marck the surface but not cut it, we were wrong... The machine end up cutting the material all the way trough. Another ting that was not as expected was that some letters that were in red (the color we set to engrave) the machine understood that it was a raster because it did not had any vectors, was like a hatch. But everything end up very well!
 
-### Pair 3
+## MDF - Lonnie, Angel, Ximena
+
+For the group assignment, we got an overview of the laser cutters at the Fablab from Josef and then went to work making a couple of items to try out settings on the laser cutter and to learn the work flow of the laser cutter.  
+
+We cut and shared with our group several objects to determine parameters of the Trotect laser cutter at fab academy Barcelona.  
+
+![kerf comb](/Users/lonniemacbook2/Documents/group-assignment/barcelona-group-assignment/docs/assignments/week03/images/kerf-comb-1.jpeg)    
+- a kerf comb to determine kerf  
+
+![kerf box](../barcelona-group-assignment/docs/assignments/week03/images/box-kerf-overall.jpeg)  
+- a kerf box as another way to determine kerf
+
+![Test Engraving Template](../barcelona-group-assignment/docs/assignments/week03/images/mdf-laser-card.jpeg)  
+- a test [engraving template](https://gitlab.fabcloud.org/academany/fabacademy/2019/labs/barcelona/students/josep-marti/tree/master/public/files/Week03) using the design that had been customized by Dhanu and Edu.   
+
+
+
+###Specs for the Fablab BCN laser cutters:  
+  Manufacturer: Trotec  
+  Power: 100 watts  
+  Power range: 0-100  
+  Max speed:  
+  Speed range: 0-1  
+  Kerf: 0.15 mm    
+  Frequency range: 0 - 20,0000  
+
+  Bed size small format machine:  
+  Bed size large format machine: 300 x 600 mm  
+
+###Setting for cutting and engraving MDF  
+
+| Operation     | Power | Speed | Frequency |
+|---------------|---|----|-----------|
+| Cutting       | 55 | .5 | 1,000  |
+| Engraving     | 40 | 2 | 1,000  |
+| Raster (low)  | 70 | 80| 1,000   |
+| Raster (med)  | 80| 80| 1,000  |
+| Raster (high) | 90| 80| 1,000  |
+
+
+
+###Here's the laser cutter workflow:  
+  Design something in 2d   
+  Export it as a file that can be read by Rhino, DXF recommended    
+  Upload the file to the [IAAC cloud](https://cloud.iaac.net:5001/)     
+  https://cloud.iaac.net:5001/    
+  Download the file from the IAAC cloud to a computer connected to the device you want to use    
+  Open the file with Rhino on the computer connected to the cutter   
+  Check dimensions etc of the file to make sure it is ok    
+  Set up colors/layers to control cut order and group things that need the same laser settings    
+  Do file -> Print to the cutter job control software    
+  Look at the file in the job cntrol software to make sure the dimensions etc are ok    
+  Set up the proper cut order using colors/layers    
+  Set up the focus and start position for the laser    
+  Check to see if the ventilation is on     
+  Click 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.   
+
+###The Kerf Comb   
+
+![Kerf Comb](../images/week03-images-laser-vinyl/kerf-comb-1.jpeg)
+![Kerf Comb 2](../images/week03-images-laser-vinyl/kerf-comb-2.jpeg)  
+
+I exported the file I created using Fusion as a dxf as recommended.  On import into Rhino, it was the wrong size.   All the info on layers and colors was lost.  So I had to resize it in Rhino and set up layers and colors in Rhino and speed, power and frequency in the job control software for the laser.  May be worthwhile learning Rhino, Josef says that it is better at 2d design than Fusion.  
+
+![Angel measuring](../images/week03-images-laser-vinyl/angel-measuring-thickness.jpeg)
+
+Angel and I designed the kerf comb with a parameter for material thickness so that it could be used with different materials.  We set the spacing of the comb slots to change at .05 mm increments.   We tried to use parameters to make the incremental changes to the slots but it doesn't seem that you can do recursion with Fusion parameters.   We looked on line and asked Josef and it seems that it is not possible.  So in the end I drew that part of it manually.   
+
+###Kerf Box  
+
+  ![Kerf Box](../images/week03-images-laser-vinyl/box-kerf-overall.jpeg)
+  ![Kerf Box Kerf](../images/week03-images-laser-vinyl/box-showing-kerf.jpeg)  
+
+Angel and I designed and cut a  box with 12 strips  to measure the kerf of the laser cutter.
+
+
+###Kerf Measurement
+
+Using the kerf comb and the kerf box we found that the laser kerf is 0.15 mm.   
+
+
+###MDF Test Board
+  We cut an MDF test board using the file made by Edu and Dhanu.  
+
+  ![mdf sample board](../images/week03-images-laser-vinyl/laser-in-action.jpeg)
+
+  ![mdf sample board 2](../images/week03-images-laser-vinyl/mdf-laser-card.jpeg)
+
+  Josef pointed out that the extra burn marks on some of the letters is related to the curviness of the letters - curvy letters cause the machine to slow down due to acceleration changes and burn more.  
+
+  ![MDF letter burn](../images/week03-images-laser-vinyl/letters-burning-speed.jpeg)
+
+  Josef suggested that slowing down the speed of the laser would minimize the variation in letter burn.  We ran out of time to try this.   
+
+  Here are the other boards using different materials made by others in our group:
+
+  ![laser cut boards](../images/week03-images-laser-vinyl/three-materials-laser.jpeg)
+
+
 
-Lonnie and Angel
 
 
 ##### Authors:
 
-- Add your names here :)
+- [Ximena][https://fabacademy.org/2022/labs/barcelona/students/ximena-amador/]
+- [Lonnie](https://fabacademy.org/2022/labs/barcelona/students/lonnie-gamble/)
 - [Marco](https://fabacademy.org/2022/labs/barcelona/students/marcoantonio-sardo/)
 - [Dhanu](https://fabacademy.org/2022/labs/barcelona/students/dhanushree-prakash/)
 - [Adai](https://fabacademy.org/2022/labs/barcelona/students/adai-surinac/)
 - [Edu](https://fabacademy.org/2022/labs/barcelona/students/eduard-almasque/)
-

docs/assignments/week05/group-project/week05-3d-group-assignment.md

+#3d Printing and Scanning
+
+Our group project this week is to explore the parameters of the 3d printrs in the lab.
+
+Dahnu found a 3D object made for testing printers and we printed it on the Creality Ender 3.
+r