Subject:
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Re: Power steering for 8448
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 8 Aug 1999 15:42:07 GMT
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Original-From:
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Jacob Schultz <ANNE.JACOB@GET2NETspamless.DK>
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Reply-To:
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c948605@student.NOSPAMdtu.dk
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Viewed:
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1340 times
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Karen Gold wrote:
> Has anyone used a motor to steer the new 8448? HOW??
>
> I put the RCX in the trunk as everybody pointed out you could do. Then I tore
> off most of the body decorative pieces to make room to put in a motor to steer
> the car, so I can use sensors to keep it from running into walls. (It goes so
> fast I can't let it go for long!) Last time I tried a power steering car it
> worked fairly well, but I had trouble slowing down the motor running the rack
> and pinion steering so it didn't tear itself apart, so this time I came up with
> an arrangement with a couple of worm gears..... I succeeded in slowing it
> down, so much that it's useless. Also late at night. Has anybody adapted the
> 8448 to use the RCX to steer it? Please, give me details!!
I don't have the 8448 myself (yet!). But I've been working with steering for quite
a time now. I've experienced the steering motor tear a car apart also, and my
solution was to add a rotaton sensor to the motor shaft, then gear it down by a
factor of three, and drive the rack with an eight teeth gear. In that way I can
always measure the angle the car is driving, and control the steering so it does
not tear the car apart.
Right now I try to put in a touch sensor also, so the car can center its steering
itself.
Jacob
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 2 Replies:
 | | RE: Power steering for 8448
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| You should be able to get away with just a single rotation sensor. When you power up the RCX, you will not know the position of the steering. Now turn it one way until the rotation stops. You are now at the end point, and know the position of the (...) (25 years ago, 9-Aug-99, to lugnet.robotics)
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Message is in Reply To:
| | Power steering for 8448
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| Has anyone used a motor to steer the new 8448? HOW?? I put the RCX in the trunk as everybody pointed out you could do. Then I tore off most of the body decorative pieces to make room to put in a motor to steer the car, so I can use sensors to keep (...) (25 years ago, 8-Aug-99, to lugnet.robotics)
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