Subject:
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Re: Jamocklaquat - Spine Segment 1
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 1 Nov 2002 01:08:50 GMT
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Viewed:
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2444 times
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A very concise answer, although it still seems like a miraculous piece of
engineering. I'm surprised the motor can handle so much arm weight. Thanks
for the extra pics. A side question, which may have been asked before, how
did you get so much lego?! I mean, you could build a house!
"Eric Sophie" <mylegomaster@cs.com> wrote in message
news:H4uBMx.M6C@lugnet.com...
> In lugnet.robotics, Jeremy Ehrmann writes:
> > Ok, this may be a silly question but.....Jamocklaquat must be immensly
> > heavy, how do you go about giving motors enough power to actually move
> > elements such as the arms (from the shoulder) or the spine with the • wieght
> > of the body on it?
>
> 9jamocklaquat1
http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/9jamocklaquat1.jpg
>
> How high can jama lift it's Arm? Hmmm, let's see.
> I ran these tests and the results show it can reach this high before
> the Worm Gear makes a nice "Krrrrpack" Sound.
>
> 9jamocklaquat2
> 9jamocklaquat3
>
>
http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/9jamocklaquat2.jpg
http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/9jamocklaquat3.jpg
>
> From the side it looks pretty good. I'd say a fair operating range.
> The Arm raises at the shoulder until it encounters the shoulder support.
> I estimated the point at which the system would fail, then installed the
> shoulder support to use up the available room outside the upper rotation • range.
> A blending of what can and cannot.
>
> 9jamocklaquat4
http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/9jamocklaquat4.jpg
>
> The Arms when moved in reverse, rotate to the same extreme. However, the • arms
> encounter the shoulder support before Worm to Turntable Failure was • detected.
>
> 9jamocklaquat5
http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/9jamocklaquat5.jpg
>
> When all said and done Jamma can spine it's upper mid arm right around
> behind it'self.
>
> 9jamocklaquat6
http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/9jamocklaquat6.jpg
>
> About the Spine Pivot, all the weight of the upper body falls on the Turn
> Tables. They act
> as the main bearing of the pivot. So if all the weight is on the pivot
> point, then all you
> have to do is use a fraction of the force to push on the upper body, • thusly
> one motor does the job. It's not winning any races, but I tell you the
> motors aren't stalling or sounding stressed. What's cool is that the spine
> bends back too, not just forward but back a bit too.
>
> 8jamocklaquat1
> 8jamocklaquat3
http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/8jamocklaquat1.jpg
http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/8jamocklaquat3.jpg
>
> I noticed a picture of the super duty worm table, but
> > even this runs on a single motor. Do you use weights or other such • mechanics
> > to take the stress off motors? Or do you use multiple motors in tandem • for a
> > single function?
>
> The Super Duty Worm Table uses two motors. I plan to incorporate wheels to
> act as ball bearings instead of the old Plate on Tile design - to much
> friction -. I'm gonna give it a try. I've seen some of the Crane Builders • do
> it I belive. So if it works Great. If not at least it can still turn at • the
> waist albeit with a little help. We'll see how it goes. I just got my Blue
> plate Order so I'm on it. Should be fun.
>
>
> The Worm Table works on two motors. You see the motor on top there with • the
> z8, it drives the z24. There is another motor just below that also drives
> the z24 gear together. The motors spin in opposite polarity to drive the • gear.
>
>
> > BTW, awesome pictures as usual.
>
> Thanks!
>
> An A.I. model running from
> > a laptop would be neat to see as part of your creation someday in the far
> > off future.
>
> With this community anything is possible! It may not be too far off!!
>
> Thanks again!
>
> e
>
>
> >
> > "Eric Sophie" <mylegomaster@cs.com> wrote in message
> > news:H4sCos.Cs4@lugnet.com...
> > > Hey all, I snapped some more gooder mo betta Jama-rama spine pix:
> > >
> > > Overall
>
>
> http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/8jamocklaquat1.jp • g
> > >
> > > Spine Loop'd-Loo - Mechanical Spine Cam Actuation -
>
>
> http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/8jamocklaquat3.jp • g
> > >
> > > Jama Eye Lights by John Barnes' hitechnicstuff.com (Thank You!!!)
>
>
> http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/8jamocklaquat4.jp • g
> > >
>
> http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/8jamocklaquat5.jp • g
> > > http://www.brickshelf.com/cgi-bin/gallery.cgi?i=264464
> > >
> > > Super Duty Worm Table
>
>
> http://www.brickshelf.com/gallery/Legomaster/Jamocklaquat/8jamocklaquat6.jp • g
> > >
> > > Two High RPM 9V Motors are connected with a short lead reversing the • polarity
> > > to drive the z24 (et als) from both sides to increase the torque.
> > > The z24 on the farside of the Worm Gear is a technique I use to keep • the
> > drive
> > > axle from bowing. With out this set up the weights involved can cause • the
> > > Worm Gear to shear right off the teeth of the Turn Table.
> > >
> > > As soon as my order of 9V leads comes in, I'll reorganize all of Jama's • wires.
> > >
> > > Jamocklaquat BS Gallery
> > > http://www.brickshelf.com/cgi-bin/gallery.cgi?f=21135
> > >
> > > Legomaster
> > >
> > > www.mylegomaster.com
> > >
> > >
> > > P.S. All your Blue Plates is are belong to Jama.
> > >
> > > P.S.S. Thanks Stuart!
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Message has 1 Reply:
 | | Re: Jamocklaquat - Spine Segment 1
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| (...) Thanks, it was fun testing it and being able to give you a real answer. (...) I took apart the Praying Mantis. I am using the Blue Technic from the Legs and frame. So in reusing the Bulk of the material from the legs I was able to make what (...) (24 years ago, 1-Nov-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: Jamocklaquat - Spine Segment 1
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| (...) 9jamocklaquat1 (URL) high can jama lift it's Arm? Hmmm, let's see. I ran these tests and the results show it can reach this high before the Worm Gear makes a nice "Krrrrpack" Sound. 9jamocklaquat2 9jamocklaquat3 (URL) the side it looks pretty (...) (24 years ago, 31-Oct-02, to lugnet.robotics)
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