Subject:
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Re: Steering Drive
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 25 Aug 2004 03:23:38 GMT
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Viewed:
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988 times
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In lugnet.robotics, Jon Gilchrist wrote:
> So I'm building this robot because my FLL kids told me it couldn't be
> done. It has to do a few things, line following, bumpers, nothing too
> special. I made it with a steering drive because it has to have
> wheels that turn to make it look right (I'll explain after it's done,
> I have to keep the design a secret for another 2 weeks). Not a big
> problem, I'm using the basic linkage that came with the racers
> (8473-1) I got at the Brickfest outlet store sale. I've got a
> differential in there with a motor to drive it, and a rotation sensor
> hooked up for distance measuring. I have a light sensor for finding
> the line I'm going to follow. Here's the tricky part. I have a touch
> sensor hooked up much like this one
> (http://www.marioferrari.org/brlm/f1614.jpg) so that I can tell when
> the wheels are pointed straight ahead.
>
> So my problem is, how do I tell which way I need to turn the motor to
> get the wheels back to straight?
>
> If the sensor is touched, I know that it is going straight, but if the
> sensor is not touched I can't figure out any good way to tell which
> side of the switch the cam is on. At least, not without using another
> sensor port, which I don't have available. I can't double up on the
> light sensor, because I can't have the sensor value go to 100 just
> because I'm going straight.
>
> Help. Any advice appreciated.
Instead you could have another light sensor, and something like this
http://www.brickshelf.com/gallery/RoscoHead/towercrane/wtsens1.jpg attached to
the steering shaft. That way the light sensor can tell 3 different states -
straight, left or right.
ROSCO
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Message is in Reply To:
 | | Steering Drive
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| So I'm building this robot because my FLL kids told me it couldn't be done. It has to do a few things, line following, bumpers, nothing too special. I made it with a steering drive because it has to have wheels that turn to make it look right (I'll (...) (20 years ago, 25-Aug-04, to lugnet.robotics)
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