Subject:
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Re: Need help with leg joints!
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Newsgroups:
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lugnet.build.mecha
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Date:
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Wed, 3 Jan 2001 04:29:04 GMT
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Viewed:
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564 times
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Bryce McGlone wrote:
> > In lugnet.build.mecha, Jeff Johnston writes:
> > I'm messing around with a two-legged walker design vaguely similar to
> > the AT-ST. This is my first real experience with large mecha, and I
> > seem to have made it too heavy for the click hinges to worm properly -
> > it'll stand up (barely) but if it's jostled it sags and collapses into a
> > little heap. So, I'm looking for any advice on making stronger leg
> > joints while still maintaining posability.
>
> Jeff,
> Usually you'll need to put a "stop" in the knee joint to keep it from
> falling down. Or maybe you could double or triple up on the click hinges
> though I've found that this method gives only slightly more stability.
Right now I've got 2 hinges on each joint. I thought that would be
sufficient, but now I wonder if there's not some kind of weird torque going on
- because I don't think the model is *that* heavy, and the hinges hold up
stuff like the LoM mechs OK.
> I've
> also seen the technic spring shock method used, but I've never tried one
> myself.
I have (for some bizarre reason) only one Technic spring shock. I'm not even
sure what set it came from.
> You could scrap the click hinges and use a different kind of joint.
I was pondering this, but I'm really not sure what other kinds of joints are
possible. Well, I did use the 2x4 hinge plate method in Dr. Cornelius'
machine, for the feet - although I wonder if those hinges ever loosen up over
time. I guess I was looking for a bit more guidance on other possibilities
from more experienced mechaheads...
J
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Message has 1 Reply:
 | | Re: Need help with leg joints!
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| (...) One thing you need to consider is that the LoM mecha have their center of gravity almost directly above the click-hinges. They also don't really put very much weight on the joints themselves. Building something with a "chicken leg" design like (...) (24 years ago, 3-Jan-01, to lugnet.build.mecha)
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Message is in Reply To:
| | Re: Need help with leg joints!
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| (...) Jeff, Usually you'll need to put a "stop" in the knee joint to keep it from falling down. Or maybe you could double or triple up on the click hinges though I've found that this method gives only slightly more stability. I've also seen the (...) (24 years ago, 3-Jan-01, to lugnet.build.mecha)
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