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Posted by Doctor Robotnik on December 9, 2005, 3:13 am
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How large would such a system be, I would need a comprressor, and tank.
Would that be really noisy as the compressor turned on, and how heavy
would a hydrolic system be. I would like this to be able to be on a
mobile platform.
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Posted by Joe Strout on December 7, 2005, 5:37 pm
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> I am looking for a flixible shaft able to transmit forces of 4240
> in/lbs at 5 rpm. Its for a robot arm, I want it to be strong but not
> bulky so that pretty much leaves me with the option of having the
> motors not in the arm itself. Gordon McComb this may be up your alley.
Maybe consider using a universal joint rather than a flexible shaft?
Something like this: <http://www.peeron.com/inv/parts/9244>
Best,
- Joe
,------------------------------------------------------------------.
| Joseph J. Strout Check out the Mac Web Directory: |
| joe@strout.net http://www.macwebdir.com |
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Posted by Matt Timmermans on December 7, 2005, 9:14 pm
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>I am looking for a flixible shaft able to transmit forces of 4240
> in/lbs at 5 rpm. Its for a robot arm, I want it to be strong but not
> bulky so that pretty much leaves me with the option of having the
> motors not in the arm itself. Gordon McComb this may be up your alley.
It'll be a lot easier if you transmit, say, 8.6 LB-IN at 2500 RPM and gear
it down close to the load. The 500:1 gear reduction can be implemented
compactly with 2 worm gear stages.
--
Matt
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Posted by steamer on December 8, 2005, 11:37 am
Please log in for more thread options --Here's a photo of one device that *may* do what you want.
There's a pointer to where to get them in the MSC catalog, too.
http://www.nmpproducts.com/artcar0508.htm
--
"Steamboat Ed" Haas : Nihil curo de ista tua
Hacking the Trailing Edge! : stulta superstitione...
http://www.nmpproducts.com/intro.htm
---Decks a-wash in a sea of words---
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Posted by John Nagle on December 9, 2005, 1:22 pm
Please log in for more thread options Doctor Robotnik wrote:
> I am looking for a flixible shaft able to transmit forces of 4240
> in/lbs at 5 rpm. Its for a robot arm, I want it to be strong but not
> bulky so that pretty much leaves me with the option of having the
> motors not in the arm itself. Gordon McComb this may be up your alley.
You need to read "Robot Evolution", by Mark Rosheim, and
see his web site, "http://www.anthrobot.com". He's an expert
in the engineering of tough, stiff robotic arms. With the
numbers you've given, you need to get into some serious
mechanical engineering for this to work.
Also, you need the catalogs from Berg and from Stock
Drive Products, so you can see what's available in parts.
Flexible shafts are not usually used for such large loads.
For numbers like that, you usually have to use solid shafts
and universal joints, or gear drives at the output end, or
chains, or cables.
John Nagle
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> in/lbs at 5 rpm. Its for a robot arm, I want it to be strong but not
> bulky so that pretty much leaves me with the option of having the
> motors not in the arm itself. Gordon McComb this may be up your alley.