Hello to all Robotics!
I put this new topic to have your advice / help.
My AL5A robotic arm was tired of doing the same things …
I thought of a rover, too expensive.
I thought of checkers, I still think better, but I’m not so convinced.
I thought of building a robotic hand (3 fingers / 5 fingers) to match the arm (instead of the grip).
Then, with a program that recognizes objects and / or color via a webcam, to move the arm to get to grab a red ball for example.
Only I would like some advice.
The robotic hand, however, I would like to build.
But not a robotic hand and three fingers of 3 servos tight.
I would also build up over time, something a little more sophisticated.
I do not mean just like this, but similar. youtube.com/watch?v=vu6APoC0 … re=related
(1:02)
So far, perhaps not so many problems, but the program?
I know it’s complicated and I leave to you the answers.
I count on you.
Hands can be quite tricky and i think unless you have the ability to make your own parts.
anyway i think the choice of hand design would be very easy to “replicate”. by replicate i mean you could get the fingers to act in the same way. but this would mean more servos than you would actually need to just make a robot hand. http://twistedsifter.com/wp-content/uploads/2009/09/robotic-hand.jpg
i say be smart. why not try and go for a 5 fingered hand that used less servos.
Thanks very much!
In fact, I found a video similar your: youtube.com/watch?v=t0-Tj3Wh … re=related
(or part 1)
I think , as you, it’s more easy.
Maybe it will be my next goal, but I have to build another robot arm.
For the program to catch an object, nothing?
Thanks anyways
But I have 2 questions:
The first coat (animatronic hand) as it does to loosen and tighten your fingers?
I see the hand behind a servo that runs when your fingers are shaking … but how the mechanism works?
In the second hand (the one I posted myself) I can not understand how they built their fingers … there is a hinge between the two phalanges? How is it?
I don’t know… I build the first hand (with 5 servo for 5 finger) or the second? The fingers of the first hand are simple respect the second, but the fingers of the second hand maybe are more good…
we have two servos shown in RED
Servo arm in GREEN
the top Blue wire connector the is pivoted from the servo horn controls the fingers and pulls them down at the same time. then we have another BLUE horn that moves the Thumb and also supplies additional movement to the fingers by pully the index/pointing fingers in movement with the thumb. its an illusion, and makes it seem the fingers are all independently controlled.
The other one uses a rotate motor to shown in RED that allows the side fingers to move around.
a slightly more technical design with lost of internal working to get the fingers to close. could be done with servos but it would be a massive hand, unless you plan to use a Pull - Pull system with wires.
Sorry…i wrote:
“the one i posted myself” it isn’t correct.
I’m not originally from this language… so, some things wrong…
I reported it to the hand / arm robot that I posted for the second time: youtube.com/watch?v=ZecMik_t0KU&NR=1
Sorry again
Andrew
EDIT: I decided: I build the Animatronic hand with some modification…I use 5 servo for 5 finger, 1 servo to tighten the fingers, 1 servo for the movement of wrist and then, 1 servo for the rotation of arm/wrist, 1 servo for the movement of elbow…and in the future I want build an human (In a future very very veeeery far away)
I don’t understand the mechanism for open and close the fingers in the mode as images…
Can you explain me this?
EDIT:
I also have another question:
the wire is attached to the middle finger and then, as does the end of the finger (the nail) to bend?
And you think, what material it is made hand?
it seem there is another Pull-Pull system on the back of the hand. you can see it actuating in the video. you could add a servo as shown to control the “Spread” of the fingers. my guess is that it could use a simple Gearing mech or push rods.
Bare in mind the actual hand in the video doesn’t actually have the servo install into the palm, but it uses cables on a Pull Pull system that would feed down to servos control box. but all the same you could use servo with in the hand so it would be directly driven.
Ok! Thanks!!
tonight or now (I hope) I will experiment to turn a finger to do it “expand” …
I watched the other 2 videos you posted.
the first think I do not even try to do it!
We upgrade on my work!
Bye
Andrew
EDIT: I add you and I subscribe on Youtube (Alien is fantastic!!)
I add and subscribe Xanore and Dialfonzo!!
First Finger’s Test
In this test, I feel the movement of a finger that will be used for the robotic hand.
The finger is composed of 3 aluminum tubes of various sizes, adhesive tape and string.
Obviously this is only the test of the movement to test the finger should be tested for the robotic hand so I used simple materials.
For the robotic hand fingers will be cut precisely and with different forms adapted to the hand.
Other tests will be made ​​on other movements of the hand and fingers.
ok … I have to go to the construction of parts of the fingers.
The forms should I do it by hand … there is no program that allows Linux to make a specific plan?
bye
Andrew
EDIT: I thought of the molds of fingers better than those I had first thought.
But I have to do precisely the dies and I need a pasty material to be cast in the form and solidify it.
The problem is: where do I find a material that is not too expensive?
thanks for the answer …
Yes I would.
However the design of the hand I have it ready, that I am missing is the material! I do not know how to build parts such as the last video I posted … I thought about using a gun in hot silicon.
I think that’s how to build it:
buy an aluminum tube as wide as a finger;
with the heat gun “shot” and construct various silicone tubing silicone;
I finish each tube with a hacksaw and drill silicone.
If you know a CAD gratis for Linux at least tell me I’ll show you the design for the finger …
thanks
andrew
EDIT: I tried but could not find anything … I think I will use the simple design.
I have several projects for the hands (already designed) but I think you see the final draft of fingers …
EDIT²:Sorry if the project will be similar to that of the video, but the type of finger had already thought of it on Youtube …
It was past midnight, while thinking of the finger '“animatronic hand” I said:
… … Right! why not use this method?
So I designed the new finger.
Then while looking on the internet, I see here is that video …
(In a future very very veeeery far away)
