L.O. (Learning Objectives) Week 16:¶ ¶ • Design and produce something with a digital fabrication process incorporating computer-aided design and manufacturing (not covered in another assignment, documenting the requirements that my assignment meets, and including everything necessary to reproduce it. • Inflatable. 16.0. Notes during the class and workshops:FABLAB¶ • ‘Do it Yourself Bio’ • Composite >> Processes >> Cutting, darts, net-shape o https://www.exactflat.com/composite o Similar to ‘Pepakura’ software https://tamasoft.co.jp/pepakura-en/ • Best website for understanding and finding materials: o https://materiom.org o 방산시장 o 동대문 시장 • Inflatable + Composite o The simpler the design, the easier the process • Inflatable • Inflatable previous examples: o Nylon PVC coated: Ripstop nylon: http://fab.cba.mit.edu/classes/863.19/CBA/people/aubreysimonson/inflatables.html http://fab.cba.mit.edu/classes/863.12/people/calisch/inflate/inflate.html http://www.inflatable-amusementpark.com/sale-9822089-led-inflatable-party-tent-pvc-coated-nylon-enclosure-inflatable-photo-booth.html o General examples: http://fab.cba.mit.edu/classes/863.19/EECS/people/kvfrans/13.html http://fab.cba.mit.edu/classes/863.18/Harvard/people/jeremy/2018/12/12/wildcard.html https://docs.google.com/spreadsheets/d/15U8C2eBQ-H4XHbToPFnz-XTID68I8oTD8oq5P7ihYtY/edit#gid=0 http://www.plusea.at http://fab.cba.mit.edu/classes/863.18/EECS/people/miana/wildcard.html http://fab.cba.mit.edu/classes/863.19/CBA/people/emmazhu/week13.html https://pt.slideshare.net/Robbym69/puff-nylon-pvc-funstore/6 • Software for Inflatable this week: o UV unwrap o MeshLab o UV unwrapping o Armorsmith o Pepakura + Wineskin https://www.youtube.com/watch?v=cHpqP0FET0w 16.1. Update my final project documentation:¶ I started this week with making detailed plans and small changes in the overall structure of my final project. My plan was to use this fabric that is often used in a swimming tube. When I researched and asked Craig what fabric it was, he suggested me to search "PVC coated nylon". I came up with this idea of using aluminium sticks around the bottom part of my final project object as well. I also refered to how this design made the curve stable and rigid. And I found some examples. The way my final project has top and bottom parts is similar to the object shown below. Found two fabric stores which I can work with and buy right materials for my final project. Bought samples - 1) ash grey color is double sided PVC, and 2) the other one colored in green is one sided PVC with nylon on the opposite side. I brought namecards with me too :) 16.2. Design something with a digital fabrication process + Computer-aided design:¶ Workflow recommended during the workshops this week: First workflow for design process: sphere 3d design in Fusion 360 -> Pepakura software Finished this egg or sphere design - and now the photos below shows the export process which is necessary in order to use Pepakura software. Pepakura is ... () I had to change to the "Wireframe" visual style in order to save the file as STL. now to Pepakura -> Although I was happy that I was able to open the file on Pepakura, the unfold result was not satisfying. If I just use the unfolded 2d design on a vinyl cutter, I would not be able to sew every edge in a day. Went back to Fusion and minimized the number of faces of my design. It was not satisfying either, so I came up with the idea of using Meshlab to reduce the number of faces more. As you can see, the shape was pretty much destroyed at that point - which is not ideal considering my near future! At this point, I thought I should make some changes in my design process. I restarted with a different approach to make a similar shape. I referred to this video, and Seokpa and Craig helped me over the weekend :) Shout out to both of them!! Thanks. And I updated my final project design after having actually touched the fabric that I'll be using. I got some help from my friend; i invided a friend of mine on Sunday. For now, I decided to go with the Option 2 because it gives more feeling of being enclosed and I prefer it aesthetically. I measured the possible sizes of each part of my design of the overall structure. And I put some masking tapes on the floor to see how big or small it is physically. And how it fits well enough when an adult is on the center. I talked about safety and stability of each option/idea with my friend and instructor. In this new design workflow, I started with an egg shape that has faces and edges rather than a plain shape. Seokpa (classmate) suggested another design workflow which sounded a lot simpler and better. I will try it when I make another version of this design after this week. Then I brought this file (STL) to Pepakura. Thanks for letting me use your window laptop, Yunje :) 16.3. Produce something with a digital fabrication process + manufacturing:¶ I used Vinyl Cutter in the lab. one more cut them assembled them and found a small(?) problem 16.4. (2) Produce something with a digital fabrication process + manufacturing:¶ Sewing process + Heatgun + Air Machine. 1. Sewing The photo below shows the workspace for the sewing machine. After changing the thread color, I set up the machine by following the instruction drawn on the machine, as well as a booklet. But after doing some test on the spare pvc, I realized something went wrong. I solved this problem by putting thread inside the machine - this thread holds the green thread tight on the back, unused side of the fabric. I used double sided tape to hold two seperate parts together, so that they do not fall apart while I sew. Later Craig told me it might become a problem when I use heatgun because the tape might stop the two pieces of pvc from melting and becomeing one. It was not a major problem, however, I will not use tape inbetween pvc when I make a real size version for my final project. 2. Heatgun I borrowed my mum's hair straightener. I wanted to minimize the area that I give heat to, so I decided to start with a hair straightener rather than a heatgun. I had to put brown paper (usually used for cooking) on it because I did not want to destroy someone else's. But I had to use some temperature-resistant tape around the brown paper so that the melt pvc (which is plastic) does not stick to the brown paper. I wanted different pieces of pvc to stick together rather than with the brown paper. But The result (test ver) was not still good. So I looked for a heatgun in the lab, hoping it will save my egg! :) And since I was sensitive and allergic to not only solder but also the heat, I thought I should be careful when melting plastic (pvc) because when I used the hair straightener there were too much fume coming out in the process, and I did not want to get sick due to this process. 3. Air machine 16.5. Upload design files and ‘hero shot’ of the final object:¶ Design First Workflow Result.f3d Design Second Workflow Result.f3d Second Design Pepakura File.stl 16.6. Trouble shooting along the way: HI TROUBLE!!!:¶ I usually show my workflow for the week in the first few sections, and use this section to discuss problems that I have faced throughout the week. For this week, I have discussed the problems throughout the documentation above already. Problem 1 Pepakura software runs in Window OS only. I found a way to run it on Mac, however this hack method did not work after trying and researching throughout the process. I then borrowed my classmate's laptop that is Windows 7. Problem 2 - Heatgun process > 16.7. The Fun Discoveries of The Week, && the Questions of the Week 16:¶ 16.8. Hi Neil -- I watched Neil's talks and interviews:¶ Video 1: Video 2: Video 3: