 | | Re: building a maze —Seymour Papert
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| | | Use a virtual maze -- for a suitably programmed robot a line drawn on paper is as good as one made of stone. ---...--- (...) have (...) but (...) possible to (...) please (...) (25 years ago, 9-Nov-99, to lugnet.robotics)
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| | | | | Re: building a maze —Vlad Dumitrescu
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| | | | | (...) Yep, but I need the light sensor for other stuff, namely to keep track of the position of the robot using a checkerboard pattern on the floor. And in any case I would need two light sensors, because I want the robot to be a little smarter than (...) (25 years ago, 9-Nov-99, to lugnet.robotics)
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| | | | | RE: building a maze —Ralph Hempel
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| | | | (...) Ahhh, now that Mr. Papert is involved I'll HAVE to get my mazewalker posted. I did just that and was able to invert the problem and move the maze under the robot. Have a look at (URL) for some introductory slides I made for Mindfest. I promise (...) (25 years ago, 9-Nov-99, to lugnet.robotics)
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| | | | | | Re: building a maze —Vlad Dumitrescu
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| | | | | (...) It would be great to learn more about your robot! However, one of the things you mention in the document as limitations, namely the incremental errors when a robot moves around, I consider to be just the crux of the matter. Navigating a maze (...) (25 years ago, 9-Nov-99, to lugnet.robotics)
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| | | | | | | RE: building a maze —Ralph Hempel
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| | | | | | (...) Yes, but it makes the whole problem MUCH harder. I prefer to solve the simple problem first, then add things like location errors later :-) (...) My bot uses all standard RIS parts except for 2 micrmotors and 2 rot sensors. You could get away (...) (25 years ago, 9-Nov-99, to lugnet.robotics)
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| | | | | | Re: building a maze —Philippe Jadin
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| | | | So, finally, someone managed to build a bot which walks into a virtual maze... Sound great, and looks like what I launched some weeks ago : the lab chalenge... I'm still trying this, but it's quite hard to have your bot do the right things. If (...) (25 years ago, 11-Nov-99, to lugnet.robotics)
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| | | | | | Re: building a maze —Vlad Dumitrescu
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| | | | | (...) Well, obviously I am, even if the maze is still not ready! :-) And the navigation system is still shaky... I plan to start a site about my project soon (maybe this weekend), a WikiWikiWeb so that anyone can contribute! /Vlad (25 years ago, 12-Nov-99, to lugnet.robotics)
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| | | | | | Re: building a maze —Richard Sutherland
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| | | | Your challenge inspired me to give it a try. I decided to make an actual moving robot that would navigate the full 8x8 maze. I constructed a section of the maze and went to work. I hope to have pictures soon, but here is a little information. Not (...) (25 years ago, 12-Nov-99, to lugnet.robotics)
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| | | | | | Re: building a maze —Paul Speed
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| | | | Interesting, About your positioning problem... perhaps you can mark down the center of the "hallways" with a different color than is used for the walls. This way you can use standard line following methods to keep your 'bot centered within the (...) (25 years ago, 12-Nov-99, to lugnet.robotics)
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| | | | | | Re: building a maze —Richard Sutherland
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| | | | That's a great idea. As it is, the light sensor 'arm' is in the forward position during travel, so I could use it to track a line down the center of the squares. I suppose I could put a colored dot on the line where the light sensor ends up if the (...) (25 years ago, 12-Nov-99, to lugnet.robotics)
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| | | | | | Re: building a maze —Vlad Dumitrescu
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| | | | (...) I tried using different colors, but it is difficult to make it work because of the limited range values of the light sensor. I got plenty of false readings, and I would like to be able to sense what is to be sensed without stopping... It (...) (25 years ago, 13-Nov-99, to lugnet.robotics)
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| | | | | | Re: building a maze —Vlad Dumitrescu
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| | | | How about moving the discussion to the LegoRobotics Wiki? There are both advantages and disadvantages... Anyway, there's a page there now... (URL) (25 years ago, 13-Nov-99, to lugnet.robotics)
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