Subject:
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Re: Poor man's rotation sensor (?)
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 31 Aug 1999 08:39:48 GMT
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Original-From:
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Laurentino Martins <LAU@antispamMAIL.TELEPAC.PT>
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Viewed:
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597 times
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At 04:39 31-08-1999 Tuesday , Joel Shafer wrote:
> I thought your poor man's tachometer made a pretty good rotation sensor.
There two main differences between a Tachometer and a Rotation sensor
1. Tachometers count distance and do not tell you the direction the axle is rotating.
2. Tachometers must be pre-reset to zero and the angle can only the deduced after that:
current_angle = n_of_ticks % n_of_ticks_per_360_degrees * 360 / n_of_ticks_per_360_degrees
Notes:
- % is the modulo division: 4 % 2 = 0.
- n_of_ticks_per_360_degrees in the example was equal to 16 (number of tooth x 2).
> At 12:09 AM 8/31/99 +0100, you wrote:
>
> > Okay, I know this is a long shot and is probably useless, but here it goes
> > anyway:
> >
> > The idea was to use the RAW mode of the Touch sensor to determine the
> > rotation of an axle on ANY given moment. This can be accomplished with a
> > 6575 part (that comes in the Space Shuttle crane) and a regular Touch sensor.
[...]
Laurentino Martins
[ mailto:lau@mail.telepac.pt ]
[ http://www.terravista.pt/Enseada/2808/ ]
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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