Wildcard
![](images/week16/4.jpg)
For the Wildcard Week assignment, I decided to make soft robot-human finger that will be convenient for me because my hole research is about prosthetics so I believe soft robotics will make a huge change in the prosthetic industry one day
So moving on so it’s my first time with soft robotics so as usual, I will start with searching on the internet and fab academy archive.
So after a lot of tutorials, most of them were about octopus Graber ْX”D very cool, if you like to check them out ------ ------.
Now I have the main consent of how to make soft robotics that makes simple consent like grabbing and relieving but I need to decide what I will make at my design, like any features I like to add and how it will lock at the end.
So after a little bit of thinking and skitching, I ended up with this shape.
![](images/week16/1.png)
So my idea is to mimic the octopus soft robot so my plan is to modify the griper a little bet to mimic the finger rotational movement.
So now for the implementation at first I made the part a little bit small so I can print and mold and cast on the same day. After reading the silicon material datasheet thy Recommend as a safety precaution to wear a glove throw the process, so at this time I didn't have gloves so I waited until I get the one because I don’t wanna end with skin rash.
![](images/week16/2.jpg)
For my first try, I failed miserably for multiple reasons.
- most of the times the silicone tear down when I try to release it from the mold
-
wall distance was very close to each other
- because I don't have access to a vacuum, the silicon has a lot of air bubble inside
I decided to remake the design from scratch and make it a lot bigger and I was thinking to make the mold with multiple parts to make it easier to cast and release the silicon part.
![](images/week16/3.png)
After printing the parts you can see how bigger than the first test
![](images/week16/4.jpg)
Mixing the silicon the solution that I use need to mix half part of each substance
![](images/week16/5.jpg)
After filling my printed molds with silicone I need to pop every air bubble that reaches the surface and tray to move it slowly to make sure that there's no bubble trapped inside
Next for the base, I just need to fill it for the half
![](images/week16/6.jpg)
Releasing the part was a little bit harder than I thought but eventually, I managed to release it
![](images/week16/7.jpg)
So the result was betty good and as you can see I made this simple structure be harder to fill the air tunnel with silicon when I connect the top with the bottom together
![](images/week16/8.jpg)
Ps before I connect the two parts together I need to make a small mark for the needle so I don't puncture the part accidentally
![](images/week16/9.jpg)
The last step is to trim the excess parts now for testing the part
![](images/week16/11.jpg)
![](images/week16/12.jpg)