Subject:
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Re: SSClagorpion
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 6 May 2004 15:29:44 GMT
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Viewed:
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14551 times
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In lugnet.technic, Steve Hassenplug wrote:
> In lugnet.technic, Kevin L. Clague wrote:
> > _
> > \____ Walking leg becomes stationary
> > _
> > \____ Walking leg becomes stationary
> > _
> > \____ Walking leg becomes stationary
> > _
> > \____ Walking leg becomes stationary
> > __
> > \__/ Timing piston
> > __
> > ___/ Stationary leg becomes walking
> > __
> > ___/ Stationary leg becomes walking
> > __
> > ___/ Stationary leg becomes walking
> > __
> > ___/ Stationary leg becomes walking
> > A
> > + All legs down
> >
> > 012345
>
>
> Makes sense to me.
> Makes sense to me.
> Makes sense to me.
> Makes sense to me.
>
> :)
Welcome to the "Department of Redundancy Department". LOL!
>
>
> The prototype leg looks very good. However, I do have one question. Given the
> angle of the leg, there will be pressure on the sidestep piston to pull the
> piston apart. (overextend) Is that something to worry about?
I don't think so as long as the piston head is not flexed too much side to side.
Too much misaligment can cause seal leakage.
Also I can try to add a mechanical stop that aleviates the full weight bearing
pull on the piston.
>
> So, most of the time, the piston will be extended (except when stepping
> sideways). Would it be better to mount the piston above the pivot, so it's
> normal state is contracted?
On one of my previous leg designs, I had the piston on the top. I intentionaly
put the piston below the leg for sylistic reasons. I think that the piston is
more "hidden" below the leg, than it is when it is on the top. I also think
this looks more natural.
>
> Also, it's hard to tell from the angle of the picture, but I assume the leglock
> is supported by more than the switch, right? I don't think it would be good to
> put the weight of the SSClagorpion into the switch. :)
Absolutely, two light grey liftarms (1x7 thick) connect the vertical hip
structure to the piston and the dark grey liftarm (1x5 thick) which attaches to
the leg structure.
>
> Next, we just need to attach a sensor, to detect when the leg is locked (one for
> each front leg) and another to detect when the foot is actually on the floor,
> and we'll be set...
I was assuming that I'd use competition arrows for feet, but I'll have to
reconsider this for the front two feet. Maybe the arrows will have to push the
touch sensors on the feet.
>
>
> Cool.
Thanks. The leg lock mechanism was a very good idea Steve, thanks. I was really
struggling with the brute force nature of three pistons leveraging on the leg.
I know my designs are not stylistic like Erics, but I do prefer a simplicity
(and therefore beauty IMHO) in my structures that I was not able to acheive with
the three vertical pistons.
I think it was Doug Carlson that said my designs were advanced, yet simple. I
like that. People often comment on how few parts I use.
I think the new leg design looks much more organic than previous designs.
>
> Steve
Kevin
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Message has 1 Reply:
 | | Re: SSClagorpion
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| (...) I suspect once you get the switches added, there will be more support. But it seems like a stop at one or both ends would not be a bad idea. (...) Yes, that leg looks very good. (...) The touch sensors don't have to be in the feet. They could (...) (21 years ago, 6-May-04, to lugnet.technic)
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Message is in Reply To:
| | Re: SSClagorpion
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| (...) Makes sense to me. Makes sense to me. Makes sense to me. Makes sense to me. :) The prototype leg looks very good. However, I do have one question. Given the angle of the leg, there will be pressure on the sidestep piston to pull the piston (...) (21 years ago, 6-May-04, to lugnet.technic)
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