#Robot Arm

[wazabi34]

New arm by wazabi34

It's very exciting when Yang have new arm. Although the story is quite serious.

[burnertracfone]

Untitled by Sukabu

[nesoldeforce-blog]

Drew on myself

[jacquistuffnthings]

Had some questions about Tetsuo’s robot arm build. Here’s how I did it! 

 1 - Make a duct tape replica of the cosplayers arm, stuff it with plastic shopping bags. (Yay recycling!) This is more work up front, but will make your life a lot easier when you’re painting and attaching things. 

 2 - Not shown, but make a glove out of metallic spandex. I cut apart an old elbow length stretch glove, copied the pattern and adjusted it to fit the cosplayer all the way up to the shoulder. It took two tries to get the fit right but it is important to get the fit right. Too loose and it won't look smooth and metallic. Too tight and you'll be uncomfortable all day or loose circulation! 

 3 - Put the glove on your duct tape arm and cut “muscle” panels out of EVA foam. Once you're happy with shapes and layout, these get all covered with various colors of metallic spandex. Some pieces I cut small slits into and stuffed with polyfill for the 3D effect. The cuts are later stitched up and covered by “veins” or bolts or other robot bits. 

 4 - Pretty much everything was attached to the glove with hot glue! (Another reason you want a duct tape arm and not your real arm in that thing when you’re working on it…) The veins and other wire things are plastic tubes and ribbons found at local hardware / craft stores. Ends of plastic tubes are hand tacked with strong thread in case the hot glue gives out. (Which it will. Hot glue is very convenient and non toxic, but not always the most reliable.) 

 5 - Paint it! You can see there is a huge difference between the painted and unpainted versions. I mostly just rubbed black and brown acrylic paints into the grooves to make it grimy looking, and added some seams and wire looking things with puff paint. 

 6 - Make sure to leave an area of the glove that can actually stretch! If you wrap all the way around the arm with EVA or tubes you won’t be able to get it off your mannequin arm, or onto your own arm later! That is why the back of the arm looks naked, but it won't be seen often so I was ok with just painting it to look a bit more detailed. 7 - Sew elastic or webbing to the top of the shoulder to make a harness. Mine adjusts with D rings and is basically modeled after what I found on Google for prosthetic arm harnesses. Try it on! Adjust! Try it on again! And then glue down some bits that came loose and you're all done!

[hellotailor]

Purely on an aesthetic level, it’s easy to understand why people are so fascinated by the Winter Soldier’s arm. But if you look into the character’s backstory, it’s clear that there’s a strong emotional component to this fandom as well. The arm is a constant visual reminder of one of the most compelling character arcs in the MCU.

Brainwashed, drugged, and with his memories completely wiped, the Winter Soldier is both a terrifying and tragic presence throughout the film. He alternates between ruthless violence when following direct orders, and childlike confusion during the brief moments when Bucky’s original personality resurfaces. He is almost unrecognizable compared to the cocky 1940s sharp-shooter we know from the first film, including the very obvious addition of a robotic metal arm.

[READ MORE]

I wrote an entire article all about Winter Soldier Robot Arm fandom. I'm 100% serious about this. Very important.

[spencersunboy]

Can you give us the instructions on how you made that awesome vriska arm?

I followed this arm sock tutorial (minus the nails)

then I looked at this

using that as a reference, I drew the dark lines on with sharpie

And then I used white and gray fabric paint to do highlights (go as thin as you can with the paint, if you get too much it will crack when you take it off and put it on)

[hello-stefanie]

We finally know how it happens...

[graskip]

[steamdumplingmodeling]

Some pictures of my yang volume 4 cosplay taken by jmw_photography_59 more pictures will be going up on my Instagram and Facebook (@steamdumpling)

[nordreys]

Bucky’s arm: how the heck does it even work (a bunch of theoretical bullshit and real-world examples of robotics and prosthetics)

(warning for discussion of real-world prosthetics and surgical procedures, if that's not your thing, but there are no graphic medical images in the post itself.) 

I have been thinking about this a LOT in the past couple of weeks, because if there is one thing I love it is robot parts and how they work - especially when those robot parts happen to be attached to living beings. I’m choosing to make this link-heavy instead of shoving in loads of images because it’s already super long, so I would definitely recommend clicking on all of the links! 

edit 10/9: added a few new links & references

So what could it be made out of?

Seeing as the Marvel universe already has several “harder than diamond”/unbreakable metals (such as Adamantium and Vibranium, the latter of which is used to make Cap’s shield), any strong metal could do the trick, obviously back in the 40’s it would have been any combination of steel alloys though personally I like the idea of Tungsten Carbide or Titanium Alloy in modern times, both of which are VERY dense, very strong, and with exception of the fantasy metals, pretty close to unbreakable themselves. Obviously the tougher the better, considering the amount of wear and tear it takes before being broken and needing repairs (for example, the Winter Soldier digs his fingers into the road to slow himself down with no visible damage, but a direct hit from Steve's shield requires maintenance).

In the movie production, the arm is made of foam rubber (for stunts) or urethane with a shiny metal finish and no particular metal inspiration is mentioned. For a closer look at the production of the movie arm and some of the concept art, check out these scans here. new:  sfx used in the film to integrate and move a digital arm discussed in this post & linked article

What does it look like on the inside?

The basic inner structure is going to look much like a human skeleton, think a lot like the Terminator endoskeletons – strong hydraulic or pneumatically driven ‘bones’ for the inner wiring and smaller movement servos to wrap around and then themselves function like human flesh and muscle. This article which talks about a super strong and durable robot hand built by a team of German researchers has some great examples of inner structure, as well as several links to other teams building and experimenting with robot hands. 

Movable outer plates

Apart from just looking cool, the outer plates help increase the range of movement for the arm itself. They move back and forth in a ‘recalibrating’ movement to increase the level of force for punching and ripping/throwing, but each individual plate would be able to move independently in order to swivel sideways or expand and contract as the inner joints move – like the way the skin of your arm distorts as you move from one position to another. This would be especially useful around the bottom of the shoulder and armpit, which is where a lot of extreme stretching and contracting of the overlapping plates would be happening. Movement reference in gif form: this post | More reference in photoset form | and another one

There would most likely be pivot points within the upper forearm (just below the elbow joint) and the mid-to-upper part of the bicep, as well as an articulated wrist joint to help create human-like levels or range of movement within the arm itself.

 How it is connected to his shoulder?

Short answer, Hydra would have most likely replaced the whole shoulder and possibly some of the clavicle, as well as the shoulder muscle and most of the chest muscles. This post by therealdeepsix and expansion upon it here by caladblog are a great read for a lot of points I’ve brought up so far, also this series of posts by ussecretlittleartists help to illustrate a lot of the possible muscle damage/replacement via anatomical studies.

There are real-world shoulder replacement prosthetics available today which illustrate how the inner metal ‘bone’ of the upper arm could be attached at the shoulder joint itself via screws into the clavicle and scapula. (linked page shows x-rays of the procedure but no photos)

As for how the metal meets the skin at the shoulder? Exoprosthesis is the term for permanent prostheses which are attached to the bone - usually via Titanium screws which are attached to and then fuse with the bone to become a solid anchor, a process called Osseointegration – and then emerge partially through the skin to attach to the rest of the prosthetic. So it is entirely likely that the edges of the metal arm are attached to the hypodermis (between the skin and the remaining muscles of the chest and back) and then the skin has grown back over it to help anchor it in place. (If you wish to look this up yourself, be prepared for some pretty graphic stuff. But here is a heartwarming video of a cat who has prosthetic back legs if you want to get an idea of how they work.)

Obviously the heavier the arm the more reinforcement is needed, which is why I seriously doubt there is any of Bucky’s original shoulder joint or humerus left – a forearm only prosthetic would put too much strain on the elbow joint and cause dislocation of the elbow and shoulder joint, plus in order to rip off bulletproof vehicle doors and support his own bodyweight from the helicarrier, his arm is going to need to need the added strength of an enhanced shoulder support. 

How does it MOVE?

Short answer: I have no idea outside of ‘fantasy robot arm does things because it is fantastical’, but prosthetics have come a long way in recent years, with many artificial limbs ‘incorporating advanced robotic and cybernetic systems that include everything up to and including mind control.’ 

Myoelectric prosthetics use electrical impulses from the remaining muscle movements which can be picked up by sensors in the prosthetic and used to control different preset movements in the hand for use in everyday life. ‘In addition to the four control signals, other signals may also be used for purposes beyond basic movements.  Although they have yet to be incorporated into commercially available prosthetics, sensors that detect pressure and temperature changes can be incorporated into the outer shell that causes feedback for the patient.’ 

Youtube link 1 | Youtube link 2

These videos give a great example of the prosthetics in use in everyday life. Also interesting to note is that the fingers have pressure sensors, so that he can even hold onto an egg without crushing it.

On a more specific level it would seem that Bucky’s arm is in some way hooked up to receive electrical and nervous impulses from the brain in a way that most (if not all) modern prosthetics just aren’t capable of yet.

new: soldier injured in afghanistan first briton to be given a prosthetic arm controlled by brain impulses

new: another article on brain-controlled prosthetic technology with information on osseointegration can be found here 

Which leads us into:

What could it feel?

Probably not much more than heat/cold or pressure, as well as a general spatial awareness not found in most prosthetics (without the ability to feel the prosthetic, people have to rely on visual reference in order to know where their arm is and what it is doing. We see several times in the movie that the winter soldier can grab objects without looking at them, so some spatial awareness and feeling must be present).

As above, some prosthetics today are able to give some limited sensory feedback such as temperature or pressure, however scientists are hoping to find a way to artificially recreate those impulses through electrodes linked to relevant areas of the brain in place of nerve cells. 

See also this TED talk with doctor and engineer Todd Kuiken about bionic replacements of missing limbs, as well as more of an overview about how brain impulses can be used to give greater control and range of movement to prosthetics.

new: DARPA’s Brain-Controlled Robotic Arm Fast-Tracked, Could Be Available in Just Four Years

If you have stuck with me all the way to the end of this infodump, congratulations! You now know way more about real world prosthetics than you probably ever wanted to. Please feel free to message me if you have any questions or suggestions, or to tell me that I got something wrong because I probably did at some point. Thanks for reading!

[jacquistuffnthings]

Tetsuo's robot arm! Happy with how it came out, should be reasonably comfortable to wear for a day or two at NYCC :)

[alchykiller]

Sudden Commission! MultiBro's Scoria. She'll punch ya.

[dragonnerd]

Human Vs Machine: Animal Crossing edition.

[adventuretimeconspiracies]

So Finn got his arm ripped off , but only half in all the other "places" (The vault, Pu hoy, Farm world ect.) his entire arm up was gone. what is your theory on this a mistake , or are they just going to put the new arm over the old arm?

You're correct in that Farmworld Finn and Puhoy Finn both look like they lost their arm up to the shoulder, but that's not entirely it.

Compare Finn's arm to Shoko's and you'll see they're the same--just above the elbow.  We knew that the grass sword had to come into play in Finn losing his arm, so it makes sense for him to lose only part of it.

Furthermore, the future Finn in dungeon train has the top of his arm covered by his clothing/armor, so there's no way to tell if he lost his arm up to the shoulder or not. 

Shoko's robot arm covers a lot of her upper arm too,

In that case, you could say that Puhoy Finn's cloth arm just goes up to the shoulder for stability just like Shoko's.

[Puhoy Finn's arm is weird though, because it isn't made of metal--since pillows are alive in this world (that might be only a dream, who knows), you could say that Puhoy Finn's new arm is alive too]

The only person we can't make this argument for is Farmworld Finn--his arm is definitely take off at the shoulder.

HOWEVER, Farmworld Finn is from a different universe with different environmental factors coming into play--he's different from the Ooo-Finn that we see in Puhoy and the Dungeon Train future.

So no, this isn't a mistake at all.  The robot arm is going to go over the old arm.

[amei-arts]

Done watching ep 4.

[graskip]