Subject:
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Re: Bruce is the man
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Newsgroups:
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lugnet.org.ca.rtltoronto
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Date:
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Tue, 29 Oct 2002 01:38:39 GMT
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Viewed:
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1006 times
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In lugnet.org.ca.rtltoronto, Matthias Jetleb writes:
> Do tell....
>
> What tips did Bruce give you? I'm making my first attempt at a
> multi-RCX robot for the block-stacking compettition and having a
> dismal time of it.
Its really simple: Always make sure that there is at least a 10ms delay
before the slave tries to respond to the master. I stuck in delays of 20ms
before every reply, and it worked like a charm! I also made sure I wasn't
sending messages from the master too close together. Before I was trying to
incorporate all kinds of error checking, and the code was a mess. Now the
communication code has absolutely no error checking and is really simple
(Bruce said he uses no error checking and has had 100% success)
> Do you have any tips on how to get a roving robot to return to base
> reliably? That probably wasn't applicable in your fire-fighing robot.
Finding home was not required for the ECRG competition, but I think it is
required in the American competition, which I would like to go to this
april. I think finding home in the firefighting arena would be easier than
in an empty area like blockstacking because of the walls. My robot navigated
by following the walls, so it always had landmarks to go by.
> BTW. What's the grey sensor on the front? I had guessed it was an IR
> detector at first, but the I have to wonder why the regular LEGO light
> sensor wouldn't work.
The grey sensor is a dual IR proximity sensor made by Pete Sevcik
(Techno-Stuff). I was not using it to detect the flame, but to detect
obstacles, since the robot was required not to touch the walls. In the end I
didn't use this sensor, but used one of John Barnes IRPD sensors, which
offered a range of readings rather than a single trigger point.
Since I have recently acquired a lot of custom sensors, I would like to be
allowed to use them in future rtl events. Proximity detection is so much
nicer than bumpers. I know you can fake it with the Lego light sensor and
sending IR messages, but John Barnes' sensors are much better suited to the
task. I think we should be allowed to use these sensors because they are
sold online, and therefore everyone has access to them.
Rob
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Message is in Reply To:
 | | Re: Bruce is the man
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| (...) What tips did Bruce give you? I'm making my first attempt at a multi-RCX robot for the block-stacking compettition and having a dismal time of it. Do you have any tips on hot to get a roving robot to return to base reliably? That probably (...) (22 years ago, 25-Oct-02, to lugnet.org.ca.rtltoronto)
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