Subject:
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Re: Mr. Jeeves
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Newsgroups:
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lugnet.build.mecha
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Date:
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Tue, 20 Dec 2005 12:27:17 GMT
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Viewed:
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1938 times
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In lugnet.build.mecha, danny staple <orionrobots@gmail.com> wrote:
>
> Hi,
> When you say mana cat - were you using the bionacle "manas" parts? Or
> was it just a name? I had some fun trying to incorporate them into a
> robot as extra powered motors for the RCX.
Good morning. (yawn) ahhh, yes, the Mana Cat, yes Manas.
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=128009
Gah, coffe.
Um, ya, the Mana Cat was suxxor. Incorrect lower legs, trouble with the neck
area. Really hit some brick walls. hahaha brick walls. Slayer.
I did walk away with some cool ideas, like the ankle return set up.
The same mechanism was used x4 for the spine, it allowed the Cat to bend forward
and arch its back then return under the spring load.
It was wild when I used the controller. But really hard to control.
I reached the motor's stall load, and the fact that each Mana responded to the
controllers in weird ways.
No two positions were the same, like it had 16 differnt movements, really hard
to remember what was what.
One other thing that was tough was the size. Adding 10L axles to either side of
the Mana units for the worm gear set ups made the legs really big.
That along with only a minimal amount of gear reduction made for additional
issues.
Maybe I'll try again sometime. I rather get another pair and make an elongated
Hexapod design like the RG Mech.
> The joints are all posable with worm gears arent they? I had a thought
> last night on a "compliant" worm gear based joint - which involved
> fixing the gear onto an axle, and allowing a housing assembly around
> the axle to move a little with a technic suspension - thus giving a
> joint a little compliance, which still springs back to the desired
> position when the force comes off. The alternative I had (which is a
> great deal more "human") was to use elastic-band tendons, and then
> have a set of two (or four using long pins) technic pulleys - either
> side of 2 pins - so a contraction would mean reeling in (winding up)
> the elastic band between the pulleys. The pulleys would probably be
> best driven by a high reduction system with a worm gear, and maybe a
> clutch to ensure that the thing stops before the band snaps. I may
> design an arm - and later a whole mech based on that...
Wait I just woke up! Head hurts! Sleepy. Time for my morning run.
Do you mean like this?
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=1224292
That is a spring loaded return joint dealy.
> The prop housings - the yellow parts are most definately from the
> yellow technic sub - I have a couple. I have seen them in red too.
> Take a look here http://www.peeron.com/inv/parts/2745 - they are
> available in grey from the X-Wing fighter.
Rassssserfratzer! Yes I need those! Blah, the set I "didn't" buy.
Thanks for pointing those out! Drool drool drool.
> Is the ball joint one of these : http://www.peeron.com/inv/parts/44359?
>
> I think the socket on Mr Jeeves is http://www.peeron.com/inv/parts/44358.
Yes you got it.
> I am always interested in socket/ball joints - and larger ones more
> so. Maybe we will see more of these in the coming lego mech series.
> Anyway - I think it looks good, thanks for posting them eric.
The only issue is they can't hold any weight.
A Technic pin fits in to the socket, but easily comes out.
The 4 stud depression helped to secure the joint, but weight pressing down is
what really makes the set up work in the case of Mr. Krinkle and Mr. Jeeves.
I once tried an experiment to secure and bind the socket as a joint here in the
Dancing Sun Power Suit, the result looked like the Mech was in traction!
hahahahha, I wanted to see if it could be done:
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=54980
see images:
ds-03-front.jpg and ds-04-rear.jpg
Cool part, just not really ment to be weight bearing, downward force is the
trick.
> Danny
> --
> Danny Staple MBCS
> OrionRobots
> http://orionrobots.co.uk
> (Full contact details available through website)
Have a good day!
e
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Message has 1 Reply:
 | | Re: Mr. Jeeves
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| Hi Eric, I have a habit of waking people up - not one for light conversation eh? (...) Cool - although it didnt work out, it is definately a cool attempt. I like those boxes, there are only 3 channels you can use with them. I did at some point have (...) (19 years ago, 20-Dec-05, to lugnet.build.mecha)
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Message is in Reply To:
| | Re: Mr. Jeeves
|
| Hi, When you say mana cat - were you using the bionacle "manas" parts? Or was it just a name? I had some fun trying to incorporate them into a robot as extra powered motors for the RCX. The joints are all posable with worm gears arent they? I had a (...) (19 years ago, 20-Dec-05, to lugnet.build.mecha)
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