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 04:15:00 GMT
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Viewed:
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998 times
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"Jon Gilchrist" <robots@DEELEETEf3p.com> wrote in message
news:cmsni0t76f5vr92g29g4d7ecg6gbu5r60i@4ax.com...
> 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.
>
> -Jon
>
>
Initialize the steering by running the motor at a low power setting in one
direction for a short period of time. If it does not engage the touch
sensor, reverse the motor and the touch sensor will stop the steering motor.
The low power is to prevent unwanted disassembly of the steering.
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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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