Help needed with endo arm, simple question.

Imperius

New Member
Ladies and Gentlemen, I'm creating a working semi-animatronic endo arm. It will be created to 1:1 specifications however I require your help to do it if possible. It will not be electronic, however it will have trigger function for the fingers and thumb. If you've seen those kids toys where you pull down on a plastic ring and it pulls a plastic band or whatnot which in turn pulls a finger down. Its physics.

Here is what I need. I need a list of materials to build the arm to exacting specifications to an endo arm replica, metal obviously. I will be using the "mini piston" rigging of the replica to either hide or become the forced needed to bend the fingers. Essencially the same system.

What do you guys think, is this possible?

Also, I am not technicly minded. So If you are able to weld or create the metal parts for me, I would pay the cost plus interest. Its difficult to find a metal shop in my city who will do it for personal reasons.

Here is an example of the parts needed.

http://www.therpf.com/showthread.php?t=79280

and here is the example of how the hand will work

http://www.discoverthis.com/smartlab-skeletal-hand.html

basicly, i'm thinking by an engineering standpoint that the pistons would be a pulley of some sort. I am considering making the wrist somewhat moveable but not horribly stiff, i might need to construct a tilting device for that.

As far as a prototype is concerned, I will be purchasing a cheap 70 buck t-800 endo arm replica kit made out of resin and use it as a basic diagram for how to build the thing. I also have a replica of an endo finger, which can provide me with a better idea of how to do it.

Now if you can help me construct such a replica, a working endo arm without hydraulics and under a few hundred bucks, I would be willing to pay as I said, for materials, delivery to my home..ect.. and when the replica is finished we could construct plans or blueprints for everyone at this community, possibly sell the product? Well, not to get ahead of myself, but Its a personal project i've wanted to do for a while, perhaps some of you may be interested.

E-mail me at BrianWilen@shaw.ca or respond here if your interested/able to participate. Credit will be given to participants.
 
Welcome, Imperius!

First, you want certain fingers to move, yes, but how 'strong' do they need to be? That may direct what/how you articulate them; i.e. using the arm's "flexor" pistons, or maybe (motorcycle) cables, running thru the parts and connected to an actuator or some sort.

As for machining the pieces, I can't help you there, sorry; but I'd be up for a group buy if the price is right:)

I'd studied the endo arm quite a bit - thinking I'd get/build one to go with my 1:1 endo skull from M1 - and decided that instead of building a resin model, I'd cast it in resin that's loaded with aluminum powder to the point where it'd be heavy! With that much Al, you can polish it to look real! http://www.smooth-on.com has great info for the new caster!

reagrds,

wolff
 
Hi,

Have had a play with a similar prop to the one you want to make. As the post before me says - what do you want to use it for? Do you only want the fingers to move or do you want to be able to pick things up? How much are you willing to compramise on screen accuracy? Depending on these things depends on what you make the arm out of.

Let us know your thought and we may be able to help.
 
Strength is important, I was thinking of using metal pieces. It would be a workable hand I'm making, including thumb, and picking up objects would be important. Primarily it would be a show piece but later on i could expand the workings to a full arm.

hope i've answered your questions.
 
Ask the guys over on the endobuildersclub.com. Mandalore697 has done some great stuff with his endo's hands and fingers with metal pulley's etc. Welcome by the way.
 
what metal are you looking to build it in? if Aluminum I can help with some of the machining.
Steel is kind of hard with my lathe.
 
what metal are you looking to build it in? if Aluminum I can help with some of the machining.
Steel is kind of hard with my lathe.

I would recommend using Aluminium just to try to keep the weight down. You will probably be able to cut and drill it easier the steel. Tin snips are good for thin sheet and hacksaws will get through the thicker bits and rod/bar. It is also a lot easier to drill.

Aluminium is also v. strong. I use it for lighting rigs all the time
 
I wanted to go for a realistic feel or look. I'm sure skynet wouldn't cheap on terminators.. remember WWSD.. What Would Skynet Do.. hey, i started a new trend on my first week... But yes, aluminum would be fine. If you could provide the parts i'd be willing to pay when i have money. I have bills to pay and will probably start the project in a few months or less.
 
Seems like a lot of people are working on these. I'm
one of them. I have my own machines so I have
most of the bases covered. Have made about 3
fingers so far.

Don
 
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