Comments on: Articulated Arm Prototype http://www.cibomahto.com/2009/06/articulated-arm-prototype/ Making Hacking Programming Building Designing Dreaming Thu, 25 Feb 2010 08:30:14 -0500 http://wordpress.org/?v=2.9.1 hourly 1 By: mahto http://www.cibomahto.com/2009/06/articulated-arm-prototype/comment-page-1/#comment-25405 mahto Thu, 25 Jun 2009 00:19:15 +0000 http://www.cibomahto.com/?p=479#comment-25405 Sweet! Sweet!

]]> By: John http://www.cibomahto.com/2009/06/articulated-arm-prototype/comment-page-1/#comment-25231 John Mon, 22 Jun 2009 16:05:15 +0000 http://www.cibomahto.com/?p=479#comment-25231 Dude, I saw this application used to articulate Jabba the Hutt's tail in Return of the Jedi. Dude,

I saw this application used to articulate Jabba the Hutt’s tail in Return of the Jedi.

]]> By: mahto http://www.cibomahto.com/2009/06/articulated-arm-prototype/comment-page-1/#comment-25227 mahto Mon, 22 Jun 2009 14:56:57 +0000 http://www.cibomahto.com/?p=479#comment-25227 Hi Sean! Ahh, cutouts sound like an excellent source for round spacing blocks. My father suggested using marbles, so that was what I planned to try today. Hi Sean! Ahh, cutouts sound like an excellent source for round spacing blocks. My father suggested using marbles, so that was what I planned to try today.

]]> By: Sean Ragan http://www.cibomahto.com/2009/06/articulated-arm-prototype/comment-page-1/#comment-25224 Sean Ragan Mon, 22 Jun 2009 13:27:41 +0000 http://www.cibomahto.com/?p=479#comment-25224 That's really cool man. Somebody has probably already mentioned, or you have already figured out, the idea that the smaller spacing blocks should be circular to allow unbiased omnidirectional articulation. Try using the 1/4" plywood cutouts from a 1.5" hole saw! That’s really cool man. Somebody has probably already mentioned, or you have already figured out, the idea that the smaller spacing blocks should be circular to allow unbiased omnidirectional articulation. Try using the 1/4″ plywood cutouts from a 1.5″ hole saw!

]]> By: mahto http://www.cibomahto.com/2009/06/articulated-arm-prototype/comment-page-1/#comment-25194 mahto Mon, 22 Jun 2009 02:20:17 +0000 http://www.cibomahto.com/?p=479#comment-25194 Hi Jay, no, I hadn't seen that before. Those are some amazing bots! Thanks for the link! Hi Jay, no, I hadn’t seen that before. Those are some amazing bots! Thanks for the link!

]]> By: jay http://www.cibomahto.com/2009/06/articulated-arm-prototype/comment-page-1/#comment-25192 jay Mon, 22 Jun 2009 01:39:45 +0000 http://www.cibomahto.com/?p=479#comment-25192 Have you seen the work done at this place? http://www.youtube.com/watch?v=L5JHMpLIqO4 The triangular "fingers" seem pretty similar (and a little more forgiving than wood). Have you seen the work done at this place?

http://www.youtube.com/watch?v=L5JHMpLIqO4

The triangular “fingers” seem pretty similar (and a little more forgiving than wood).

]]> By: mahto http://www.cibomahto.com/2009/06/articulated-arm-prototype/comment-page-1/#comment-24936 mahto Fri, 19 Jun 2009 05:41:54 +0000 http://www.cibomahto.com/?p=479#comment-24936 Thanks everyone! @Rick: Thanks for sharing, it must be quite a feat to get the snake arms to be that stable, and to be able to apply any useful force at their tip. @Tim: Those sound way cool, do you have photos of them online? I was actually thinking about making some beaded 'lampshades' that danced to music or something. @Mike: Thanks for the links! The push puppet toy site brings back some fond memories :-). @Phil: Aha, using springs would allow you to miniaturize the whole assembly, which would make sense for endoscopes... I could see some cool applications, such as a proboscis for a mechanical mosquito... Thanks everyone!

@Rick: Thanks for sharing, it must be quite a feat to get the snake arms to be that stable, and to be able to apply any useful force at their tip.

@Tim: Those sound way cool, do you have photos of them online? I was actually thinking about making some beaded ‘lampshades’ that danced to music or something.

@Mike: Thanks for the links! The push puppet toy site brings back some fond memories :-) .

@Phil: Aha, using springs would allow you to miniaturize the whole assembly, which would make sense for endoscopes… I could see some cool applications, such as a proboscis for a mechanical mosquito…

]]> By: phil http://www.cibomahto.com/2009/06/articulated-arm-prototype/comment-page-1/#comment-24900 phil Thu, 18 Jun 2009 20:54:08 +0000 http://www.cibomahto.com/?p=479#comment-24900 Some endoscopes use a similar principle to this. You can use a multi-lumen catheter with control wires up the outer cores - or more easy to construct yourself and fun to play with: two springs one inside the other, the inner one should be a tension spring ie cannot be compressed any more than it already is, 4ish control wires run up between the ID of the inner and OD of the outer, put flexible packing strips up between the control wires to keep them evenly separated. Fix the control wires at one end and pull the other end. You can then stick what ever you want up the centre as like wires to an LED. I think there's a patent on it somewhere and maybe even a website promoting the concept. Some endoscopes use a similar principle to this. You can use a multi-lumen catheter with control wires up the outer cores – or more easy to construct yourself and fun to play with: two springs one inside the other, the inner one should be a tension spring ie cannot be compressed any more than it already is, 4ish control wires run up between the ID of the inner and OD of the outer, put flexible packing strips up between the control wires to keep them evenly separated. Fix the control wires at one end and pull the other end. You can then stick what ever you want up the centre as like wires to an LED. I think there’s a patent on it somewhere and maybe even a website promoting the concept.

]]> By: Mike http://www.cibomahto.com/2009/06/articulated-arm-prototype/comment-page-1/#comment-24889 Mike Thu, 18 Jun 2009 19:02:26 +0000 http://www.cibomahto.com/?p=479#comment-24889 Rock'em Sockem Robots may work via a similar method, but I've never taken them apart. http://www.backtobasicstoys.com/item/productid/6091 Rock’em Sockem Robots may work via a similar method, but I’ve never taken them apart.

http://www.backtobasicstoys.com/item/productid/6091

]]> By: Mike http://www.cibomahto.com/2009/06/articulated-arm-prototype/comment-page-1/#comment-24888 Mike Thu, 18 Jun 2009 19:00:37 +0000 http://www.cibomahto.com/?p=479#comment-24888 There used to be toys that were about 4 inch tall figures standing on a 3/4 in tall base. The base has a spring, that kept an internal plunger expanded. The plunger was attached to strings that ran through the joints of the figure. If you left it alone, it stood there. If you pushed the plunger in the base, the figure would droop or fall. A rapid series of pushes would vaguely simulate dancing. http://www.pushpuppet.com/ There used to be toys that were about 4 inch tall figures standing on a 3/4 in tall base. The base has a spring, that kept an internal plunger expanded. The plunger was attached to strings that ran through the joints of the figure. If you left it alone, it stood there. If you pushed the plunger in the base, the figure would droop or fall. A rapid series of pushes would vaguely simulate dancing.

http://www.pushpuppet.com/

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