Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: Half Shell on January 01, 2008, 06:53:18 PM

Title: Low Cost Robotic Hand
Post by: Half Shell on January 01, 2008, 06:53:18 PM: Not too long ago I came across an article about a cheap 30 dollar hand controlled by yarn. I just thought of it now and realized a handful of servos added to the ends of those strings and suddenly you have a low cost robotic hand.

http://hackedgadgets.com/2007/12/29/articulated-hand-for-under-20/
http://www.instructables.com/id/Science-Fair---Articulated-Hand--20#allstepslogin

How do you gentlemen recommend hooking up the strings to the hand? I'm thinking a number of multiple rotation (but not full rotation) servos with wheels attached that act like a pulley system on the strings.
Title: Re: Low Cost Robotic Hand
Post by: airman00 on January 01, 2008, 06:54:21 PM: i saw soemthing on Mythbusters liek that using bycycle chain. ANy1 else saw that episode?
Title: Re: Low Cost Robotic Hand
Post by: HDL_CinC_Dragon on January 01, 2008, 07:37:20 PM: Yeah I saw that episode... dont remember anything about it though :P
Ive been looking to do something like this for a while and was hoping I was being at least slightly original when I came up with the idea... but then I see already made plans and such wide spread over the net lol
Title: Re: Low Cost Robotic Hand
Post by: Fredrik Andersson on January 03, 2008, 03:08:57 PM: Now this reminds me of a video posted here a while ago:
http://www.societyofrobots.com/robotforum/index.php?topic=2289.0 (http://www.societyofrobots.com/robotforum/index.php?topic=2289.0)

Hope it gives some inspiration...
Title: Re: Low Cost Robotic Hand
Post by: Half Shell on January 03, 2008, 03:42:30 PM: Got the dowels and all materials needed for the hand. I am going to be using a thin wire instead of yarn - both for strength and ease to incorporate servos with the wire.

Right now I'm shopping for a set of 5 cheap cheap partial rotation servos. If you got a nice one to recommend drop me a link.

I'm debating what to do after getting motors running the initial hand. Should I build a senored glove to act as a control? Hmmm...
Title: Re: Low Cost Robotic Hand
Post by: ed1380 on January 03, 2008, 04:09:54 PM: google nintendo power glove
Title: Re: Low Cost Robotic Hand
Post by: Half Shell on January 03, 2008, 04:52:03 PM: Ooooh good idea - I have a comic book shop that sells old hardware like that too. I might be able to snag one for the cheap.
Title: Re: Low Cost Robotic Hand
Post by: SmAsH on January 10, 2008, 05:22:58 PM: ok i tried making one of those the other day when i saw mythbusters....the string keps snapping :'( but i eventually set up my motors so they stopped at a certain time....i put it on my robot....it weighs way to much. robot keeps flipping..
oh well great idea tho.
Title: Re: Low Cost Robotic Hand
Post by: airman00 on January 10, 2008, 07:20:25 PM: Quote from: SmAsH on January 10, 2008, 05:22:58 PM
ok i tried making one of those the other day when i saw mythbusters....the string keps snapping :'( but i eventually set up my motors so they stopped at a certain time....i put it on my robot....it weighs way to much. robot keeps flipping..
oh well great idea tho.

I believe photos are appropriate ;)
Title: Re: Low Cost Robotic Hand
Post by: SmAsH on January 10, 2008, 10:12:05 PM: yea i will post a vid and photos when i appropreatly fit it onto my robot
Title: Re: Low Cost Robotic Hand
Post by: airman00 on January 11, 2008, 05:22:04 AM: lol

i want to see pics of it separately also
Title: Re: Low Cost Robotic Hand
Post by: Half Shell on January 11, 2008, 10:28:50 AM: I just got an e-mail from my school - the hand has been finished. I started it over winter break but didn't finish in time so my wood working genius father finished it for me. I'll post pictures of it once I get it.