 | | Re: RIS parts questions
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There's an older version of the black pegs that are even tighter. Too tight, in my opinion, so I've set the few that I have aside. You can easily tell the difference- look at a regular black peg. It has short lengthwise ridges on the ends about 2mm (...) (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | Re: RIS parts questions
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(...) The black ones fit tightly into the holes in various Lego parts - the grey ones are a looser fit and spin freely. Use grey pegs to fit parts that will rotate relative to one another - use black ones otherwise. See this for more details about (...) (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | Re: LEGO's position on third party brick's
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(...) I believe that the patents on the basic brick/stud technology expired quite a few years ago - so you may just be able to do it. However, there are patents on lots of the *other* Lego components - so beware if you are planning more (...) (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | Re: RIS parts questions
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(...) What is the difference? (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | Robot Ant and Data logging
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HI, I am building a robot ant and using a light sensor to detect lines to follow. However, the algorithm I am using must not be deterministic; i.e. I need to do a sensor sweep and build a graph of the relative light levels at the left, front and (...) (23 years ago, 4-Apr-02, to lugnet.robotics.rcx.robolab)
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| | Re: Need help with NQC
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"Russell Newman" <victoreden@netzero.net> wrote in message news:GtLuCA.38p@lugnet.com... (...) RCX (...) In what way is it misbehaving? When backing up, it only backs up for 3/4 of a second. Is that enough? When turning, it only turns for a maximum (...) (23 years ago, 4-Apr-02, to lugnet.robotics.rcx.nqc)
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| | Re: Discontinuous motion.
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Steve, Here's an "all gear" based solution (minus the chain I used from the drive shaft): (URL) not sure how much gear lash is in the design I came up with, but the thing runs very well (much better than I thought it would). It's been quite some (...) (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | Error Message
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Hi. Can anyone help me with a problem I'm having. I'm writing a fairly simple program in NQC and when I compile I get an error saying "undefined variable SENSOR_LIGHT" The line that generates this error is simply: SetSensor(SENSOR_1, SENSOR_LIGHT); (...) (23 years ago, 4-Apr-02, to lugnet.robotics.rcx.nqc)
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| | LEGO's position on third party brick's
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I am looking for information / contacts / polices / licensing that may be required to build and sell LEGO compatible components. Any information would be helpful Thanks JohnG (23 years ago, 3-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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(...) OH! I see! Very clever. I guess I should explain why I wanted this thing in the first place. All the talk last week about building a Turing machine using Lego - and building primitive mechanical computers in general led me to try to build a (...) (23 years ago, 3-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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(...) I've tried that - it jams periodically when the teeth of one wheel meet point-to-point against the teeth of the wheel it's driving. This seems to be because of the strange angle at which the first wheel approaches the second at it initially (...) (23 years ago, 3-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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"Steve Baker" <lego-robotics@crynwr.com> wrote in message news:3CAA6B95.CB1986...ail.net... (...) (A) (...) you (...) rotating (...) You can do this without modifying any gears. To approximate a gear with teeth missing, all you need to do is have (...) (23 years ago, 3-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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(...) Yes - that's essentially what I did when I said: (...) I used a large gear to mount the smaller one off-axis instead of the 'arm' you describe - but functionally, it's the same. The trouble is that during the period when the two gears are not (...) (23 years ago, 3-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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(...) Thanks - but that's not what I'm after. I want the input shaft to be rotating continuously - and the output shaft to be stationary for some relatively large amount of time - then suddenly rotate for a short time. This cycle should be repeated. (...) (23 years ago, 3-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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(...) No - I *won't* consider hacking away at my Lego parts - however, it may be possible to take that idea and build something that would be similar. ---...--- Steve Baker ---...--- Mail : <sjbaker1@airmail.net> WorkMail: <sjbaker@link.com> URLs : (...) (23 years ago, 3-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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(...) Yes - pretty good stuff. So it looks like I need to find an 'interpretation' of that Geneva Escapement in Lego. (Yikes!) ---...--- Steve Baker ---...--- Mail : <sjbaker1@airmail.net> WorkMail: <sjbaker@link.com> URLs : (8 URLs) (23 years ago, 3-Apr-02, to lugnet.robotics)
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| | RE: PBrick for PalmOS
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I'm really interestied by program the RCX by Palm. But I need to know how to devellope program for Palm. Can you Help me ? nanobapy -----Message d'origine----- De : Till Harbaum [mailto:harbaum@tm.uka.de] Envoyé : mercredi 3 avril 2002 15:53 À : (...) (23 years ago, 3-Apr-02, to lugnet.robotics)
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| | PBrick for PalmOS
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Hi, i finally put up a web page for my PBrick project (Palm RCX bidirectional IR communication). Have a look at (URL) Till (23 years ago, 3-Apr-02, to lugnet.robotics)
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| | RL 2.5 and 2.0 incompatibility
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A cautionary note for situations where RL 2.5 and 2.0 co-exist as in schools which are in transition to upgrading their software. Be aware that if an RCX has RL 2.5 firmware, programs downloaded from RL 2.0 will only go to slot #3. So additional (...) (23 years ago, 3-Apr-02, to lugnet.robotics.rcx.robolab)
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| | Re: Discontinuous motion.
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Bill, This exact same question was posted several months ago but I don't remember the sollution that they came to. This is my Idea: Ok you take two pulleys, pulley (A) is smaller then pulley (B). You then conect the 2 pulleys via a linkage so that (...) (23 years ago, 2-Apr-02, to lugnet.robotics)
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