Subject:
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Re: SSCorpion
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Newsgroups:
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lugnet.technic
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Date:
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Tue, 13 Apr 2004 22:52:29 GMT
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Viewed:
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7031 times
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In lugnet.technic, Kevin L. Clague wrote:
> In lugnet.technic, Steve Hassenplug wrote:
> > In lugnet.technic, Eric Sophie wrote:
> > > Ok, the way a Scorpion rears up and curls or extends its tail forward to sting
> > > or threaten, wow, that requires some travel at the upper leg connection at the
> > > body. It would be cool.
> >
> > I hadn't really thougth about standing up on it's hind legs. I don't know how
> > well it will work, but what if it were to sit down (front legs straight, back
> > legs fully retracted) then, start straightning legs from the front to the back.
> > The net effect would (could) be to stand up on it's rear legs & tail.
> >
> > Nice trick for a dog. Great trick for a scorpion. :)
>
> Actually we want it to stand on its front legs. This brings the tail forward.
>
> Scorpions sting forward with their tails, so we need to lower the front end and
> raise the backend, plus curl the tail forward more than normal.
>
> >
> > The balance would need to be just right, and the back legs would need to be
> > strong enough to lift the whole robot. If we can do it, it would be great.
>
> If we add a degree of freedom that makes the hip thrust the leg downward, along
> an axis from front to back, this will thrust the back end up.
We could make this eaily with a Technic Turntables. Depends on how you will
create the legs. It will be your decision.
> >
> > Steve
>
> Quad242/Hex363 class walkers have a simple formula for the number of pistons and
> switches needed. One piston and switch per leg group plus two pistons and four
> switches per leg.
>
> Since it looks like SSClagorpion will be a Quad242/Hex363 class walker, it will
> take:
>
> Pistons = 2 + 2*8 = 18
> Switches = 2 + 4*8 = 34
>
> We need four polarity reversors for forward/backward/right/left controls. Each
> reversor takes four switches, so we have to add another 16 switches.
>
> Now we're up to 50 switches and 18 pistons. I know I have this much but I have
> a rediculous amount of pneumatics. Thank goodness for bricklink and the 8455!
>
> Side walking will cost us even more......
>
> SSClagorpion (at least the first copy) is coming out of Eric's inventory, so I
> think we might be limited by the number of switches he has.
>
> Kevin
Uggg, I don't have that many!
:(
I know I'm talking like I have got it all, but I still gotta give Rob Limbaugh
some. LOL!
heh heh Match ya? heh heh, if we fully consider the process and have commitments
and solid plans, we could, ask for help with parts.
When done in a way to promote building and understanding, we may qualify.
Hint Hint, nudge nudge, people in high places. Cough Cough.
e
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Message is in Reply To:
 | | Re: SSCorpion
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| (...) Actually we want it to stand on its front legs. This brings the tail forward. Scorpions sting forward with their tails, so we need to lower the front end and raise the backend, plus curl the tail forward more than normal. (...) If we add a (...) (20 years ago, 13-Apr-04, to lugnet.technic)
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