 | | Re: Robotex2003 Winner: Lego
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I found some picture from the event. It has been really hard to find any information at all. All pictures: (...) (22 years ago, 2-Dec-03, to lugnet.robotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) I'd recommend pneumatics instead of large number of RCX's. Kevin (22 years ago, 2-Dec-03, to lugnet.robotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) Yes (...) Not really, if you start with a hexapod and break the legs down into two groups of three (you get stability that way) you should be able to do it with two outputs (one for start/stop the other for for/rev). As an aside, and a rather (...) (22 years ago, 1-Dec-03, to lugnet.robotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) That's one approach, probably the wrong one considering the limitations of the RCX. Instead of trying to solve your problems with the RCX why not take the approach of the original; pullies, gears, differentials, gear trains, etc. As I made (...) (22 years ago, 1-Dec-03, to lugnet.robotics)
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| | Re: failure in communicaton between RCX & IR Tower
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Nathan, I have done this trouble shooting step, ie. changing the timing. Unfortunately, it did not work. But, thank you though. Well, the a W2Kpro virtual machine approach did not work either... I guess my only alternative will be getting the (...) (22 years ago, 1-Dec-03, to lugnet.robotics.rcx.robolab)
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| | Re: Pneumatic Quadraped 242
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(...) snip (...) I started working on articulated head and tail. Quad242 has a very large footprint, and walks inefficiently. One of the reasons for large feet is center of gravity. The center of gravity on Quad242 is just a little behind the center (...) (22 years ago, 1-Dec-03, to lugnet.technic, lugnet.build, lugnet.robotics, FTX)
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| | Re: New LEGOTIC Hand
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(...) Even more impressive now than the prototype I saw some time ago... Very clever use of Bionicle parts, would be a winner if a "Technic lame parts" contest was organized! XP to lugnet.robotics Philo (22 years ago, 1-Dec-03, to lugnet.technic, lugnet.robotics)
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| | Re: an idea, can someone tell me if this is possible/been done before/etc?
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(...) Plenty of people have build eight legged walkers - that's not all that hard. However, the machine in WWW is supposedly very flexible and could climb near vertical cliff-faces, etc. You'd need at least two or three motors per leg to get that (...) (22 years ago, 1-Dec-03, to lugnet.robotics)
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| | an idea, can someone tell me if this is possible/been done before/etc?
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Or, provide suggestions on how to do it? I saw Wild Wild West the other day and was looking at the giant spider robot and wondered if making such a "sipder" robot is possible with lego robotics? Would it be possible? Has anyone done it? Does anyone (...) (22 years ago, 1-Dec-03, to lugnet.robotics)
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| | Re: Opening COM port error
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(...) Tyler, Happy to be of help! Regarding Garbage Collection, I'm not usually one to criticise without being able to suggest a better alternative. In this case, I think most GC systems could be improved by mimicking the concept of "smart pointers" (...) (22 years ago, 30-Nov-03, to lugnet.robotics.rcx.java, lugnet.off-topic.geek)
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| | Re: "Non-Robolab" LabView functions
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(...) Disagree. It's a matter of habitudes. Once you're familiar with the whole environment, you may write extremely complex programs without getting lost. For example, in our recent "Mars-mission" telerobotics project the complete programming -the (...) (22 years ago, 30-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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(...) They do work! But they are usually used with two quadrature outputs (hence the name), while on RCX only one wire is used and the 4 states are encoded as 4 voltages levels. (URL) (Image courtesy Michael Gasperi) The sequence (clockwise) is (...) (22 years ago, 30-Nov-03, to lugnet.robotics, lugnet.robotics.rcx.robolab, FTX)
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| | Re: Robolab, byte codes and assembler
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(...) The way I understand it, it's really not the sensor's fault. The RCX and firmware together either can't or doesn't deal with the ambiguous voltage levels sometimes returned during two of the four transitions. If the RCX were fast enough that (...) (22 years ago, 30-Nov-03, to lugnet.robotics, lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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Could someone explain to me technically why this sort of of problem with the rotation sensor occurs? I know how quadrature shaft encoders are _supposed_ to work, and I can't see why this sort of thing should happen in the first place. >> Mark (22 years ago, 30-Nov-03, to lugnet.robotics, lugnet.robotics.rcx.robolab)
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| | Re: "Non-Robolab" LabView functions
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(...) Still waiting to hear from Dick about that. (...) I disagree that it's easier to understand and use. Possibly easier to learn or figure out without documentation, up to a point. But ease of learning is not the same as ease of use. Graphical (...) (22 years ago, 30-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Building a RCX™-compatible temperature sensor
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An easy one, that has already be done numerous times... anyway, here is my implementation of a fully RCX-compatible temperature sensor, that provides correct values when used with standard RCX temperature routines. (2 URLs) RCX-compatible (...) (22 years ago, 30-Nov-03, to lugnet.robotics, FTX)
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| | Re: "Non-Robolab" LabView functions
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(...) ---...--->snip I've not had the time yet to analyze the patch. Seems that you replace the first firmware handler. In Robolab the firmware is found under ..ROBOLAB\Engine\RCX1\Text. They simply have changed the extension .lgo to .txt and call (...) (22 years ago, 30-Nov-03, to lugnet.robotics.rcx.robolab)
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| | WTF: Broken RCX units
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Anyone have or know where I can find broken RCX units for parts? Thanks, Rand (22 years ago, 30-Nov-03, to lugnet.robotics.rcx)
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| | Re: Opening COM port error
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In lugnet.robotics.rcx.java, Chris Phillips wrote: Hahaha, Your passionate condemnation of GC makes entertaining reading in light of the amount of work I have to do with lejos,Java,C++, etc for my final year undergraduate project. I will certainly (...) (22 years ago, 30-Nov-03, to lugnet.robotics.rcx.java)
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| | Re: Patched firmware to improve rotation sensor, was Re: Robolab, byte codes and assembler
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(...) It took me some time to figure out why, but you are right, the ambiguous transitions occur only while counting up. What you could do though would be to count +1 while going from state3 to state2_ambiguous, and correct "phantom transition" by (...) (22 years ago, 30-Nov-03, to lugnet.robotics, lugnet.robotics.rcx.robolab)
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