Subject:
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Re: The Beeesh
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Newsgroups:
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lugnet.build.mecha
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Date:
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Thu, 13 Jan 2005 19:51:38 GMT
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Viewed:
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1189 times
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In lugnet.build.mecha, Brian Pilati wrote:
> In lugnet.build.mecha, Eric Sophie wrote:
> > Build your dreams.
> >
> >
>
> I have found your Beeesh and the following thread quite enlightening (This
> thread is all that I have ever heard LUGNET to be -- thanks all).
Both thank you and sorry about that. Sometimes we have difficulty playing
together in the sand box.
> I have had a mild interest in starting to build Mechs and it sounds like you
> know quite a bit.
I might rabbit, I might.
> So if you don't mind a few questions from a newbie?
Please do, this makes it fun.
> So your entire creation's articulation comes from different combinations and
> techniques of gears and axles?
Yes.
> When you articulated the MOC for the pictures did you just move the limbs
> with your hands or do you actually have a gear based system from a central
> point on the model to position the separate limbs?
Each joint is controlled and held in place by use of worm gears.
The Mecha can hold its shape and pose due to these components.
Coupled together with other elements like, Gearboxes and Turntables.
So adjacent to each joint is a control knob to adjust the limbs.
> I read on a another post that because of the weight of the LEGO bricks some
> joints must be strengthened? Do you have any links or documentation that
> suggests have to strengthen those joints? Of course, from the reading of the
> thread I have found that is part of the beauty of Mech design and might not
> be freely shared. I found a link on the lugnet.build.mecha home page but
> they were only pictures not details.
What this means is, there are combinations of techniques that are employed to
keep the limbs in place. Using high torque ratios in gearing is one way.
I use z40-to-z8 gearing combos. Binding the technic beam directly to the z40 by
use of half-axle technic pins. This puts the weight on the gear not the axle.
This alliveates (gosh I can't spell) the axle twist and further reduces the
backlash Mecha suffer from when using geared systems.
Some builders have invented ways of stiffening joints. Adding media to ball
joints to provide additional stiffness. I myself do not use these as I feel they
are handicaps. However, many builders have found success in adding paper and
even rubber cement to ball clips to provide some additonal holding power.
It really comes down to what you expect a given joint can handle.
Working within the confines of each joint type and workable scale is called
Joint Discipline.
Meaning, making a Mecha from all technic pins, ball joints, gears, pnuematics
worm gears etc...
> Do you happen to have a video of your Beeesh in motion? I am quite curious
> to see how the pneumatics and RCX combine for movement.
I do not at the moment. The head of the Beeesh was designed to be motorized so I
could remotely operate or program the movement for shows and exhibits.
The Beeesh is very stable and can accomodate the weight shifting (movement of
the head) without falling over. Pretty neat in person I must say.
The pnuematics in the head simply lift and lower the head. There is no RCX.
If you are still curious, please post more questions and I will offer what I
have learned.
Thank you!
e
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Message has 1 Reply:
 | | Re: The Beeesh
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| (...) Eric, I appreciate your responses. (...) Amazing! (...) So I guess the question and decision I am left with is: Do I create my own joints from scratch or do I ask for examples and start from where others have left off? What would you (...) (19 years ago, 13-Jan-05, to lugnet.build.mecha)
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Message is in Reply To:
| | Re: The Beeesh
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| (...) I have found your Beesch and the following thread quite enlightening (This thread is all that I have ever heard LUGNET to be -- thanks all). I have had a mild interest in starting to build Mechs and it sounds like you know quite a bit. So if (...) (19 years ago, 12-Jan-05, to lugnet.build.mecha, FTX)
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