Subject:
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RE: Worm Drive Question
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 25 Nov 1998 21:40:52 GMT
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Original-From:
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CERRINA, Benoit <Benoit.Cerrina@&saynotospam&rp-rorer.com>
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Viewed:
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2059 times
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You are still replying to how to find where is the car not to how to tell
the car to go to a specific floor.
Benoit Cerrina
(610) 454 8347
Benoit.cerrina@writeme.com
http://www.geocities.com/SiliconValley/Peaks/2404/
> ----------
> From: Louis-Marius Gendreau
> Sent: Wednesday, November 25, 1998 4:23 PM
> To: 'lego-robotics@crynwr.com'
> Subject: RE: Worm Drive Question
>
> But what I propose is initialize on ground floor Floor = 1 and then just
> go
> Floor=Floor+1 or Floor=Floor-1 each time you "feel" a bump. So you don't
> need "bits". It is less elegant, but it allows for more floors. I wonder
> if real elevators work like that? Probably not!
>
> Now that does not solve the problem of knowing where the elevator was
> called
> either...
>
> -----Original Message-----
> From: CERRINA, Benoit [mailto:Benoit.Cerrina@rp-rorer.com]
> Sent: Wednesday, November 25, 1998 4:10 PM
> To: 'lego-robotics@crynwr.com'; 'Louis-Marius Gendreau'
> Subject: RE: Worm Drive Question
>
>
> This is exactly what he was proposing without the bottom floor sensor, his
> problem however was how to tell the elevator where to go, with only two
> sensor slot left he can only input a 2bit number ie from 0 to 3 hence four
> floors.
> However here is another way to do the floor number you could use the light
> sensor and a paper band with shades of grey you slide it in front of the
> sensor and push a button when its at the right place
>
> IIIII
> IIII
> III
> [===] II
> I
>
> III = shades of grey on the Paper
> [===] light sensor
>
>
>
> Benoit Cerrina
> (610) 454 8347
> Benoit.cerrina@writeme.com
> http://www.geocities.com/SiliconValley/Peaks/2404/
>
> > ----------
> > From: Louis-Marius Gendreau
> > Sent: Wednesday, November 25, 1998 3:54 PM
> > To: 'lego-robotics@crynwr.com'
> > Subject: RE: Worm Drive Question
> >
> > If you do not want to be limited to four floors you could have one long
> > rod
> > with "bumps" at every floor. With something sticking out of the • elevator
> > car, you know you have reached a floor everytime the rod is lifted from
> > the
> > ground. If you want to be able to set ground 0 to know where to start
> > counting you can put a sensor under the elevator car so it knows it is • on
> > the ground. You then you need a kind of initialize routine.
> >
> > |
> > |
> > |
> > ->
> > |
> > |
> > |
> > ->
> > | _
> > | <-| |
> > | -
> > ->
> > |
> > etc...
> > |
> > |
> > S
> >
> > S = sensor
> > | = rod
> > -> = spokes sticking out of rod
> > <- = spoke stiking out of elevator to lift the rod
> >
> >
> > The other way is to put a sensor on the elevator car that detects the • bump
> > on every floor. That's much simpler but the brick and motor get to be on
> > the
> > car and hence it gets to be pretty big.
> >
> > --
> > Louis-Marius Gendreau
> > Prisident, ClicNet Tilicommunications, Inc
> > Qui: 418-686-2542 Fax: 682-6247
> > Mtl: 514-875-8830 Fax: 875-0571
> > lmgendreau@clic.net
> >
> >
> > -----Original Message-----
> > From: John Scott Kjellman [mailto:jkjellman@ameritech.net]
> > Sent: Wednesday, November 25, 1998 12:07 PM
> > To: LEGO Robotics List
> > Subject: Re: Worm Drive Question
> >
> >
> > Just to toss in my three cents (inflation adjusted to 1998 rates ;-)
> >
> > It seems there are two more options that might be a little easier:
> >
> > 1) My kids have gotten a couple of Lego sets that contain a long square
> > shaft that has teeth on it. It mates to a large brick that contains a
> > small gear attached to a shaft. If you insert the rod into the brick
> > and turn the shaft the rod moves in/out (or up/down, depending on its
> > orientation). This has a travel of about 8 inches.
> > [SNIP]
> >
> >
> > I was thinking about building the same thing (my 4 year old loves Legos
> > and elevators). I had planned on approach 2) coupled with a long rod
> > connected to a touch sensor. The rod would have wedge shaped bumps at
> > every floor so that as the elevator passed it would trigger the touch
> > sensor. that way you would know what floor you were on. You could then
> > use the other inputs for the floor buttons (four floors would be the
> > maximum without an extremely clever mechanism to allow the reuse of the
> > third input).
> >
> > Oh well, enough rambling...
> >
> > Take care,
> > KJohn
> >
> > stephen p spackman wrote:
> > >
> > > Matt Sailors wrote:
> > >
> > > > > Sorry I Lost you there, what do you mean by cut Lego?
> > > > >
> > > > > Tim
> > > >
> > > > I mean cut threads (like on a screw) into the axel using a thread
> > > > cutting tool (part of a tap and die set available at most good • hardware
> > > > stores). Check out http://www.net-info.com/~dcarlson/ near the • bottom
> > > > of the page.
> > >
> > > Sure, you can do this with puppies, too! Ick, shudder!
> > >
> > > ("Arthur, Arthur, come quick! Someone's knurled the cat!"
> > > - hypothetical Monty Python skit)
> > >
> > > stephen
>
>
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