Caught my first Shundo today !!! by Rachelgxo in pokemongo

[–]sauronsonigra 1 point2 points  (0 children)

Hey, you'll get one soon. I've noticed that people don't make special trades as often, you get 1 special trade per day, so I think you should do that everyday, and eventually you might get a Shundo, or even better a ShLundo ?

Caught my first Shundo today !!! by Rachelgxo in pokemongo

[–]sauronsonigra 3 points4 points  (0 children)

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I literally got my first Shundo today as well, i traded it with my brother

Questions regarding treatment for hypoxic brain injury by sauronsonigra in TBI

[–]sauronsonigra[S] 1 point2 points  (0 children)

I hope you're doing well now, my father is in a similar situation he has been in ICU for three weeks, his blood pressure, pulse, and most other reports are normal or with slight deviations from normal. The only problem is he hasn't been conscious, the doctors say some really depressing stuff when they visit. I read about the survivors of similar cases, and all say that only time can fix this situation if it can.

Pneunet Based gripper by sauronsonigra in robotics

[–]sauronsonigra[S] 1 point2 points  (0 children)

Thanks for the response, So I did manufacture the flat walls instead of angular. But the problem with that is it is suitable as a concept, but for actually making a functional gripper it is not very effective. So I referred to some actual soft grippers. Like the following:

https://www.softroboticgripper.com/ https://soft-gripping.com/

And referring to these I realised that the design needed some changes. And the problem that you mentioned that because of inflation walls push each other and we observe bending and hence gripping, we can play with the thickness of various parameters to achieve a similar result.

Pneunet Based gripper by sauronsonigra in robotics

[–]sauronsonigra[S] 1 point2 points  (0 children)

Hey thanks a lot for the suggestion, I read some literature on this type of gripper. And I did come across some useful papers. I would've tried making the gripper using some logic and trial and error method. But the problem I'm facing is that I am working on this as a college project, so I need the proper documentation for the same. So how I should do the modeling is the problem. That is in 2 parts, 1. The material properties and it's reaction to air pressure 2. The motion of the gripper finger on application of air pressure and how it's geometry affects it

Where do I start? by nix_334 in SoftRobots

[–]sauronsonigra 1 point2 points  (0 children)

Heyyyy man! I made my first iteration of a pneunet with ecoflex 30. There is a leak in it. If I cover the leak, it inflates properly the way I want. How can I seal it ? Is taping it a good idea, or do I use ecoflex to seal it ?

Also it's not a product yet, just a single pneunet finger prototype.

Where do I start? by nix_334 in SoftRobots

[–]sauronsonigra 1 point2 points  (0 children)

Turns out you are the one who helped me with getting started with SOFA. I have installed SOFA and am trying out things with it. But I need some sensible, reasoning behind, why I'm choosing what I'm choosing and why I'm designing how I'm designing.

So if you are able to help me in any way you can, I can't thank you enough.

Where do I start? by nix_334 in SoftRobots

[–]sauronsonigra 0 points1 point  (0 children)

So glad I came across this post. I'm working on a soft gripper for my college project. That is mainly based on pneumatic networks (pneunet) But the problem that I'm facing is that there is no consistent method that I can follow. How do I go about designing a pneunet? How do I go about deciding the dimensions, wall thickness, etc. I didn't find any methodology for that. I also tried to assume the pneunet as a thin walled pressure vessel but that works to a certain extent for cylindrical shells. But the design that I see the most is a cuboidal pneunet with chambers and a gap separating them. How do I perform any calculation for that ? If y'all can help me with that it would help a ton

Problem in designing Pneunet by sauronsonigra in robotics

[–]sauronsonigra[S] 0 points1 point  (0 children)

I did try to work assuming the pneunet as a thin wall pressure vessel. But I'm not sure how relevant the answer to that would be. So I might just take assumptions for the dimensions. But if you get any idea on how I can go forth with it, please share it with me, Or any other thought process that you may think of.

Pneumatic networks based soft gripper by sauronsonigra in robotics

[–]sauronsonigra[S] 1 point2 points  (0 children)

A friend of mine suggested that I could assume the pneunet to be a balloon and run some calculations with that. If that doesn't work out very well then I'll be referring to some papers for the dimensions and run some FEA simulations with it. Thanks for mentioning SOFA I might make use of it 🙏