Subject:
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Re: Pictures of New technique: Cascaded Trinary Pneumatics (aka mid-stop)
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Newsgroups:
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lugnet.technic, lugnet.robotics
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Date:
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Sun, 16 Oct 2005 16:59:54 GMT
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Viewed:
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11618 times
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In lugnet.technic, Mark Bellis wrote:
<snip>
> >
> > Hi Mark, cool stuff!
> >
> > I guess that the ganged switches on the far right are the switch stage, but I
> > don't know what the other two large blocks are, or how they work. One thing I
> > learned early with documenting MOCs, is to never use black when there is another
> > option. Black is so hard to photograph so that you can see anything inside the
> > borders.
> >
> > Is the cascade stage in the lower left, and the steering stage in the upperl
> > left?
> >
> > I think I see five switches in the lower left module, three ganged together
> > using bands, and one on each end. I also see three switches in the upper left
> > module. Are the switch linkages in all three modules like the one in the lower
> > right?
> >
> > Thanks for sharing,
> > Kevin
>
> Hi Kevin,
>
> Yes, the bottom right stage is the control stage, with 2 active switches. I
> left the third one in to keep the stability with the cams and 2L liftarms so
> that the 1x4 brick with holes moves as a parallelogram.
>
> I got into the habit of trying to make models in a single colour! It's usually
> the case that black is the colour I have most of, especially in Technic. In
> lieu of better visibility, I used a couple of 8L axles, which each have a
> cylinder pushing on them. They're separated by 3L liftarms with +o+ holes, with
> a 1x4 brick with holes just behind the switch levers. The middle switch has a
> peg in the middle hole of the 1x4 brick, with the outer switches' pegs resting
> on the ends of the brick, pulled in by the belts. The same mechanism is used in
> all 3 stages. I found that the belts had more pulling power on the ends of #2
> axle joints than when they were lower down.
>
> The bottom left stage is the cascade stage, with the middle 3 (2 in Evo 2)
> switches controlling itself and the outer 2 controlling the next stage. The
> outer 2 switches are rigidly linked to the adjacent ones so that they have more
> limited movement than the centre switch, though I'm changing this for Evo 2.
>
> The top left stage is the steering stage, which is similar but without the
> output switches. I developed the cascade stage from this, and this in turn was
> developed from the original switch geometry, which had a control stage and 4
> switches controlling itself! That development was when I used the cams and 2L
> liftarms so that I could get rid of the 4th switch.
>
> Mark
Mark,
I've tried to study the pictures, but I cannot resolve the mechanical
linkages, and/or the pneumatic hookups. I was going to try to draw up a
schematic, but I just can't resolve the images.
Any chances we could see a schematic, or an LDraw file of the linkages?
Kevin
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