 | | PANIC !!!!!
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Hallo I´ve just heart that the Mindstorm Series will be stoped for the sake of the spybot? Is this true, if yes we just have to start a fight for the survival of our RCX Sascha (23 years ago, 23-Nov-02, to lugnet.robotics.rcx)
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| | Re: articulation points?
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All this talk of articulation points reminds me of an actual splined robot. Basically, it was a series of convex circles through which ran a series of wires, with a space in the middle for a spray hose or pressure cleaning equipment to pass through. (...) (23 years ago, 23-Nov-02, to lugnet.build.mecha, lugnet.technic, lugnet.robotics)
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| | brickos 0.2.6.09
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In step 3 of the installation instructions, what do I put for brickos 0.2.6.09? Thank you in advance, Scott (23 years ago, 23-Nov-02, to lugnet.robotics)
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| | Re: On LEGO Compressors & Pump Testing
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(...) Now, how did that happen? (...) Sure thing, another notch for the mini-pump compressors! (23 years ago, 23-Nov-02, to lugnet.robotics, lugnet.technic)
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| | Re: On LEGO Compressors & Pump Testing
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(...) Er, it's hard to tell just by looking at the picture. Besides it's kinda dark and blurry. I see a lot of gears (linking the two motors?) and can just make out the 4 small pumps. How about separating the two motors so you get two independent (...) (23 years ago, 23-Nov-02, to lugnet.robotics, lugnet.technic)
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| | Re: Newbie has an idea - Nascar style racing?
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maybe it would be better if u could cause accidents ----- Original Message ----- From: "Gustav Jansson" <GJansson@aol.com> To: <lego-robotics@crynwr.com> Sent: Saturday, November 23, 2002 11:36 AM Subject: Re: Newbie has an idea - Nascar style (...) (23 years ago, 24-Nov-02, to lugnet.robotics)
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| | Re: Why...
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 (...) The OS should not impose conditions on the programmer. Just put in the docs "numbers less than 5ms (the default) are not recommended" or something to that effect. (...) My code isn't a task. It's (...) (23 years ago, 23-Nov-02, to lugnet.robotics.rcx.legos)
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| | Re: Newbie has an idea - Nascar style racing?
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(...) Good idea! I was thinking more in terms of bumpers but taillights and forward pointing light sensors is much better. That would allow a robot coming from behind to setup a pass without hitting the robot in front. Perhaps the sensor input used (...) (23 years ago, 23-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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(...) If this is a race (as opposed to a set of solo time trials) then I think you need some way for cars to avoid each other. Maybe requiring each car to have a 'tail light' at a specified height so that a forward facing light sensor could detect (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | RE: Newbie has an idea - Nascar style racing?
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(...) Inkjet plotters are should be pretty common in mechanical enginnering firms these days. Colleges may also have them. The billboard and sign industry uses huge paint plotters, but those are much more expensive to run than inkjet plotters (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: which kit 1.5, or 2.0
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(...) There are Linux tools available. NQC (Not Quite C) is very popular amongst serious builders - and it runs nicely under Linux. You can also get into the whole BrickOS thing - which is a replacement OpenSourced operating system that runs on the (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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(...) Yes. But start simple. (...) As Brass said, Kinkos can do 3' by X Or, I'm sure it would be possible to make a Word document that can be taped together. (...) 2'x4'? no, that's much too small. (This may be where we loose people) I was thinking (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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(...) Yes - I agree - but having a second 'formula' to allow for the experts to race honking great machines with multiple RCX's and a dozen motors would be nice. (...) Most people don't have access to plotters. The most likely thing that everyone (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Motor speed
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(...) Even if it wasn't the case, robots don't drive straight because of small differences in how you build one side of the robot compared to the other (eg the collars might be squeezed more tightly onto a beam on one motor than on the other)...also (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: On LEGO Compressors & Pump Testing
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Hi guys, You all missed this page about a year ago, I presume. My double stroke compressor, with build-in 9V power-supply and automatic on-off switch. When used in combination with an airtank, it stops pumping when your desired max. pressure is (...) (23 years ago, 22-Nov-02, to lugnet.robotics, lugnet.technic)
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| | Re: First LEGO League competition in Cincinnati Ohio
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As a head referee for 3 of these contests this year, and many in the past, I have to second Jeff's recommendation to volunteer for these. You can find them on www.legoleague.org . Better yet, form a team and be a coach for next year. Believe me, (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Motor speed
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(...) Short answer: Suck it up. Long answer: (URL) Steve Baker ---...--- HomeEmail: <sjbaker1@airmail.net> WorkEmail: <sjbaker@link.com> HomePage : (URL) : (4 URLs) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: which kit 1.5, or 2.0
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(...) Oops! Forgot the second half of your question. There are three RCX varients: RIS 2.0 -- Has a USB-port interface to the IR tower that lets you download programs to the RCX computer. RIS 1.5 -- Same deal - but the IR tower is interfaced via the (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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(...) Kinkos will do black and white, 3ft by however long, for relatively cheap. Color is expensive, but b&w isn't. (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: additions to RIS
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What can you do with the fiber-optic set? ----- Original Message ----- From: "Benjamin Medinets" <bmedinets@excite.com> To: <lego-robotics@crynwr.com> Sent: Friday, November 22, 2002 11:55 AM Subject: Re: additions to RIS (...) The parts selection (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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(...) why? Is line following bad? It will be IMPOSSIBLE to build an autonomus NASCAR style car from Mindstorms. You just can't get enough information about the track & your position into the RCX. (...) With the gray-scale scheme Gus suggested, a (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: additions to RIS
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(...) The parts selection isn't that good in the expansion packs. The Extreme Creatures pack has the fiber-optic set which might be useful to some tech-heads. The Robo Sports has some "cute" plastic sports accessories, but hardly anything useful, (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | First LEGO League competition in Cincinnati Ohio
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I just got back from the First LEGO League competition in Cincinnati Ohio. I got a sweet volunteer job there. I got to be the helper for one half of the practice table. The table is divided in half and each team gets one half. I got to time them (5 (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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Now that's a well cool idea! We could set up 'formulas' based on the parts usable by the cars and the programming allowed, something like Formula 3 - standard RIS kit only, regular/NQC RCX code Formula 2 - standard RIS kit only, any (BrickOS, QC, (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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I have given this a fair amount of thought that is not reflected in the sample track. For example, the track should have shoulders on both sides of the gray scale that are opposite to the color on the respective sides of the gray scale. In other (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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I've considered that concept, but I wanted to avoid a variation of line following. In real racing, drivers go full throttle until a specific braking point. the faster riders generally brake later without screwing up the corner By defining the (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Motor speed
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(...) may "drift" slowly. But you can block it with the clutch gear, then it needs real some motor force to turn. Jürgen (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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Here's an interesting idea from Gus Jansson for that type of track: (URL) allows you to maintain a smooth line around the course, but not all 'cars' have to follow the same line. You have to be carefull not to get to close to the inside, or (unless (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: which kit 1.5, or 2.0
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The sets are fairly similar in terms of pieces and hardware. The major difference is the RIS 2.0 software, which, if you are planning to use the Linux tools, doesn't really matter to you. I say go 1.5 you can find great deals on them currently. Hope (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Motor speed
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(...) I think in RCX you get 100 levels. We use JCX which gives us 255 levels. Either one should be plenty. Bruce ------- WWW.SYSTRONIX.COM ---...--- Real embedded Java and much more High speed 8051 systems +1-801-534-1017 Salt Lake City, USA (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Motor speed
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(...) Trying to adjust the power settings probably won't work - not only do the motors vary slightly, but also their performance varies with the battery life. But with Mindstorms there are usually several different ways of overcoming any particular (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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One idea that I always wanted to persue was autonomus car racing, nascar style. I thought of setting up a small oval on a 4x8 sheet of plywood and marking the entrance to the corners in one shade, inside boundries(3' from the wall) in a second shade (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: articulation points?
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"Steve Baker" <lego-robotics@crynwr.com> skrev i meddelandet news:3DDC4185.404050...ail.net... (...) Agreed. (...) Not agreed. In mathematics (and statistics is just a part of math), you are not limited to 3D space, and higher spaces need more (...) (23 years ago, 21-Nov-02, to lugnet.robotics)
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| | Re: Motor speed
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(...) I figgered that was the case. <sigh> (...) At the moment, it doesn't interfere with anything, as I am just starting to build things and am just now building the roverbot and going through the various "challenges". I'll keep those in mind (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: Motor speed
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Quoting Brass Tilde <brasstilde@insightbb.com>: (...) Yes. If you are using multiple motors to drive a small robot one way to compensate is with rotation sensors, or use a single motor and a differential to get the robot to drive straight. Or maybe (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Motor speed
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I've just gotten my RIS 2.0, and I've noticed that the two motors appear to operate at slightly different speeds. Is this something that is usual, or am I looking at something that deserves replacement. I can live with the "suck it up" option, it (...) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | which kit 1.5, or 2.0
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Hi, I'm new to the list, and to lego robotics for that matter. I am looking to buy one of the kits but would like to be able to use all the linux programming tools available. What are the differences between the 1.5, and 2.0 kits? (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: On LEGO Compressors & Pump Testing
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(...) couple of years ago and used to think that the large one was the only option. (the 8868 Airtech Claw Rig was not properly advertised in the US and I didn't hear about it until 2000) However, there is a pack of two available on the Dacta (...) (23 years ago, 22-Nov-02, to lugnet.robotics, lugnet.technic)
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| | Re: additions to RIS
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(...) Extreme Creatures is a waste of money. I got mine for $20 and I'm still angry. $5 should be more like it. -- The proposed Microsoft settlement is not a hand slap, it's a finger slap. Dr. Julian "a tribble took it" Gomez ** (URL) (23 years ago, 22-Nov-02, to lugnet.robotics)
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| | Re: On LEGO Compressors & Pump Testing
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(...) I understand why compressors using large pumps are still around - many people simply don't have the little ones. Whereas they are likely to own the large pump which comes along with the Technic pneumatics sets (except 8868 which includes a (...) (23 years ago, 22-Nov-02, to lugnet.robotics, lugnet.technic)
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| | Re: articulation points?
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(...) Exactly. Another way to look at DOF is that it is the number of things that have to be specified to define a particular configuration of the system. In other words how many RCX outputs does it take to drive. Another thing to keep in mind is (...) (23 years ago, 22-Nov-02, to lugnet.robotics, lugnet.build.mecha, lugnet.technic)
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| | Re: Books on Vision Command and Image Processing
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If Vision Command works like Lego RoboLab's image processing software, then look at: (URL) RoboLab software can use the Vision Command hardware. For more on RoboLab, look at: (URL) general image processing, look at: (URL) Vision (URL) Vision Maybe (...) (23 years ago, 22-Nov-02, to lugnet.robotics.vc)
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| | Re: LNP-problem...
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That looks ok to me. But I'm no expert on LNP. Here's a clip I use. It looks a lot like what you're using. It seems there may be a problem with your receive code. I'm REAL shaky on that. What does fputs do? ---- char *s; s = "101"; if (strlen(s)>0) (...) (23 years ago, 21-Nov-02, to lugnet.robotics.rcx.legos)
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| | BrickOS - RCX has problems turning ON
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Hi, I have two RCX's (from v1.5 kits) bought about a year apart. The newer one has no problems with BrickOS, the older one will only work using the slow transfer speed and does not turn on easily after the BrickOS firmware is loaded onto it. Usually (...) (23 years ago, 21-Nov-02, to lugnet.robotics)
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| | Sony Infra Red HandyBoard Transmission
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Has anyone successfully modified the sonyxmit.asm driver on page 267/268 of Fred Martin's publication: Robotic Explorations? I've been trying to modify the driver so that it will communicate with a Sony TV, so far without success. In the book Fred (...) (23 years ago, 20-Nov-02, to lugnet.robotics.handyboard)
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| | Re: articulation points?
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Date : Thu, 21 Nov 2002 16:23:22 +0000 This is just like anything else in the world....it is all realative to what your trying to prove. If you are talking about DOF for the entire object if would have 3. (x,y,z) If you look at single peices of an (...) (23 years ago, 21-Nov-02, to lugnet.robotics)
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| | Re: LNP-problem...
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(...) ok this is the (relevant) code running on the rcx: int main(int argc, char *argv[]) { char *p; init(); execi(&PacketWatcher, 0, NULL, PRIO_NORMAL, DEFAULT_STACK_SIZE); execi(&Messenger, 0, NULL, PRIO_LOWEST, DEFAULT_STACK_SIZE); return 0; } (...) (23 years ago, 21-Nov-02, to lugnet.robotics.rcx.legos)
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| | Books on Vision Command and Image Processing
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Hi, Does anybody know of any books on Vision Command at all. Especially any books at the level of David Baum's or Bagnall's on Mindstorms. I am really interested in detailed image processing with Vision Command. Thanks, Jon (23 years ago, 21-Nov-02, to lugnet.robotics)
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| | Vision Command Books
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Hi, Does anybody know of any books on Vision Command at all. Especially any books at the level of David Baum's or Bagnall's on Mindstorms. I am really interested in detailed image processing with VC. Thanks, Jon (23 years ago, 21-Nov-02, to lugnet.robotics.vc)
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| | Spybots IR Comm
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Hi, I buyed a Spybot short time ago and started to try programming it with BricxCC and NQC. From the software included in the spybot-package I know, that spybots can send IR messages to each other in order to get the other bots´ position. My (...) (23 years ago, 21-Nov-02, to lugnet.robotics.spybotics)
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| | iPAQ <-> RCX serial communication
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Hello People I am working on a project where we are trying to use a compaq handheld with linux and a wireless card as the "brain" of robots. "Underneath" we have an RCX acting as a "spine", which is supposed to receive macro commands from the PC and (...) (23 years ago, 21-Nov-02, to lugnet.robotics.rcx.java)
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| | Re: articulation points?
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(...) I was under the impression that a 6 head video recorder was a marketing concept, i.e. it has 4 video heads and 2 audio heads, so in this case (all things being equal) it would be exactly the same as the 4 head one. This is really what I've (...) (23 years ago, 21-Nov-02, to lugnet.robotics)
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| | Re: articulation points?
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(...) Here I go, tossing my 2 cents in to the fray: I would say that any differential drive on a flat surface has 3 DOF: -Assume it drives along the X axis (thats 1) -it can rotate around the Z axis (2 now) -once it rotates it can drive along the y (...) (23 years ago, 18-Nov-02, to lugnet.robotics, lugnet.build.mecha, lugnet.technic)
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| | Re: Another cement mixer......
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Andrea, Excellent model! Nice to see someone else also constructed a mixer truck. Seems that your model is fully operational. Did you have to cope come difficulties with the drumm? (shape, connection, motorization etc.). I'm curious to your next (...) (23 years ago, 21-Nov-02, to lugnet.technic, lugnet.robotics, lugnet.general, lugnet.modelteam, lugnet.loc.it)
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| | Re: Motor Control Register (0xf000)
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(...) It's the one I meant, thanks. Jürgen (23 years ago, 21-Nov-02, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: articulation points?
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(...) The trouble with this is that it's not necessarily true. Take 100 Lego turntables and connect them up into a vertical column. By this measure, it has 100 DOF - but as a mechanism, it has no more flexibility than a single turntable (1-DOF). (...) (23 years ago, 21-Nov-02, to lugnet.robotics)
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| | Re: Helicopter was Re: Newbie has an idea
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(...) A Lego remote controller would be cheaper than a second RCX. ---...--- Steve Baker ---...--- HomeEmail: <sjbaker1@airmail.net> WorkEmail: <sjbaker@link.com> HomePage : (URL) : (4 URLs) (23 years ago, 21-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea
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(...) Yes. (...) Depends a lot on how much work your robot is doing. If it's just running the computer with no motors or sensors turned on - then probably 12 hours. If you are running lots of motors and sensors then it's more like 3 hours...but it (...) (23 years ago, 21-Nov-02, to lugnet.robotics)
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| | Re: Why...
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Nick, Setting the timeslice to a low number (5ms is fairly low), negetively effects overall system performance. Time used by the operating system for task switching is taken away from applications. If a switch takes .5ms (for example) and you switch (...) (23 years ago, 21-Nov-02, to lugnet.robotics.rcx.legos)
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| | Re: Newbie has an idea
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(...) Power-to-weight ratio's are far too poor. Electric-powered aircraft have to be built with very careful attention to battery and motor technology with the lightest possible designs. Lego is HEAVY - so no aircraft. (...) Yes - that's fairly (...) (23 years ago, 21-Nov-02, to lugnet.robotics)
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| | Re: articulation points?
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(...) >be honest have yet to come to a definitive answer. The (...) Opinion seems to be divided on the meaning of this term. In my field (computer graphics), I'd say that each joint in the mechanism had between zero and six degrees of freedom, but (...) (23 years ago, 21-Nov-02, to lugnet.robotics)
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| | Re: Jumping robot
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Could a microscout be useful for this, or is extra intelligence needed to maintain balance? ----- Original Message ----- From: "Nick Tarleton" <nickptar@mindspring.com> To: <lego-robotics@crynwr.com> Sent: Wednesday, November 20, 2002 6:58 PM (...) (23 years ago, 21-Nov-02, to lugnet.robotics)
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| | Re: articulation points?
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|
The main reason it would make sense to quote the total DOF is that is determines the volume the arm needs or is able to work in. For example imagine a snake-bot with a dozen 2 DOF joints. It can reach around objects to position it's effector. So it (...) (23 years ago, 21-Nov-02, to lugnet.robotics, lugnet.build.mecha, lugnet.technic)
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| | Re: Jumping robot
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(...) Have it umbilically attatched to the RCX. Use pneumatics liberally. (23 years ago, 20-Nov-02, to lugnet.robotics)
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| | Why...
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ... is the minimum timeslice interval 5ms? I'm writing a program that needs a routine to be run every 1ms for a period of time. I did this by setting it as the timeslice handler, but then I needed to (...) (23 years ago, 16-Nov-02, to lugnet.robotics.rcx.legos)
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| | RE: articulation points?
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(...) That, to me (and according to all definitions I've seen) is "range of motion". However, without DOF's, an effector couldn't be positioned. (...) The more DOF's, the better the overall control and positioning *could* be. In the case of the (...) (23 years ago, 20-Nov-02, to lugnet.robotics)
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| | Re: Motor Control Register (0xf000)
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(...) Yeah, I missed that, I'll add that to the notes. (...) Too bad they didn't document the hole well enough to make it obvious to the people at Lego, who apparently had no idea. They use "mov.w rx,@0xf000:16" all over the place instead of the (...) (23 years ago, 20-Nov-02, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: Motor Control Register (0xf000)
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(...) Thanks for the suggestion... I think the change I made a few days ago included a note here also, but we might be talking about different spots. Let me know if not... kekoa@stanford.edu. -Kekoa (23 years ago, 20-Nov-02, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: articulation points?
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i never really gave it a thought about the hand not having rotation of its own accord, but rather gets it from the elbow. that solves a huge problem i'm having with my mech. you see, i'm having difficulty with my mech holding his weapon because it's (...) (23 years ago, 20-Nov-02, to lugnet.build.mecha, lugnet.technic, lugnet.robotics)
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| | LegOS/BrickOS on Mac OS X?
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I was wondering if anyone had successfully ported the H8 compiler over to OS X? With an USB IR Tower, and the underlying Unix/BSD resources on the Mac, it would be an ideal development platform. I've tried compiling the H8 Cross compiler without (...) (23 years ago, 20-Nov-02, to lugnet.robotics.rcx.legos)
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| | Re: Jumping robot
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Have a look to Miguel Agullo Jumpbot (URL) while there have a look to his bipeds and bipeds links !) Philo www.philohome.com (...) (23 years ago, 20-Nov-02, to lugnet.robotics)
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| | Re: Jumping robot
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(...) Try Google with "hopping robots" or "jumping robots" for a start. I think you might have difficulty getting a Lego-only robot to jump, though. It's hard to get enough force, and just as hard to "wind up" to build enough force to launch an RCX (...) (23 years ago, 20-Nov-02, to lugnet.robotics)
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| | Helicopter was Re: Newbie has an idea
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(...) I have built not a plane but a helicopter that does fly (sort of) which is remotely controlled. Here are some recent photos: (URL) you can see from the pictures, the helicopter does not fly free. It is attached to a cantilevered arm that uses (...) (23 years ago, 20-Nov-02, to lugnet.robotics)
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| | Re: LNP-problem...
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Why don't you post the code you're using. Then we can tell you if it's a problem with the program. Steve ----- Original Message ----- From: Tom Wouters <aqua@no__spam.ulyssis.org> Date: Wed, 20 Nov 2002 17:21:47 GMT To: (...) (23 years ago, 20-Nov-02, to lugnet.robotics.rcx.legos)
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| | Re: Newbie has an idea
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Do I have to buy the batteries seperatedly? How long can they last? Want can the robots do since they are so basic not like r2d2, c3po...? I whould like to read some ideas for this RIS 2.0 set specially. (...) (23 years ago, 20-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea
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(...) Very unlikely. Some guy tried controlling a kite to make it work like a hangglider, you can check that here, its cool (URL) tried making an airship/Zepplin using helium balloons to create the lift, and having fans to steer the thing around, (...) (23 years ago, 20-Nov-02, to lugnet.robotics)
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| | Newbie has an idea
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If everything goes fine I'll be getting a RIS 2.0 it will be my 1st LEGO MINDSTORMS set. I have an idea but may is not possible to do specially a newbie like me won't be able to do it but I whould like to know if is possible to do a remote control (...) (23 years ago, 20-Nov-02, to lugnet.robotics)
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| | LNP-problem...
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hi there we seem to have a not so tiny problem with lnp, we can send messages from the tower to the rcx, but until now we have failed to get the rcx to send a message tot the computer, we have tried various versions of the legos kernel, none of them (...) (23 years ago, 20-Nov-02, to lugnet.robotics.rcx.legos)
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| | Jumping robot
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Hi all! I am going to design and build a jumping robot to a local competition. Before I start my design I would like to see existing similar robots, but I didn't find such a thing. Does anyone know of a robot able to jump? Thanks in advance, Javier (...) (23 years ago, 20-Nov-02, to lugnet.robotics)
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| | Re: articulation points?
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(...) I think you've hit the nail on the head here Eric. To me, the most logical way of looking at a robot arm would be from the point of view of the end effector, i.e. what it can and cannot do. The way the arm moves to get there may be of less (...) (23 years ago, 20-Nov-02, to lugnet.robotics, lugnet.build.mecha, lugnet.technic)
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| | Re: articulation points?
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(...) Very interesting thread. A bit OT (and picky ;) mabye, but about the human arm: If you examine your arm closley you'll find that the rotation of the hand actualy comes from the elbow witch rotates the under arm. The wrist only actes as a dual (...) (23 years ago, 20-Nov-02, to lugnet.build.mecha, lugnet.technic, lugnet.robotics)
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| | Re: articulation points?
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Not to be a goof, but, OMG! Bram is Crazy Smart! I gotta go a take some more vitamins and drink Carrot Juice! Ahhh! I see the concept much the same, I figure if we refer to a POA in a Mecha model as the counting scheme, we won't get alot of run away (...) (23 years ago, 20-Nov-02, to lugnet.build.mecha, lugnet.technic, lugnet.robotics)
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| | Re: articulation points?
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You present interesting aspects of the term, could it be that the term has many meanings and really if we understood it correctly we would do justice to the proper meaning. Context is everything, yet you raise ideas and examples that indeed (...) (23 years ago, 20-Nov-02, to lugnet.robotics)
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| | Re: articulation points?
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(...) It seems so, Jenifer has brought to light that the two don't always correspond, and or there can be differences. It's pretty interesting, although I never really thought about it seriously before, I just build stuff. ;) (...) Well, more so (...) (23 years ago, 20-Nov-02, to lugnet.build.mecha, lugnet.technic, lugnet.robotics)
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| | Re: articulation points?
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o.k. so let me get this right: poa doesn't necessarily dictate dof. poa refers to the axes a given object can rotate around, but dof refers to the limitations (or lack thereof) in space a given object can move around in. according to eric, i may use (...) (23 years ago, 20-Nov-02, to lugnet.build.mecha, lugnet.technic, lugnet.robotics)
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| | Re: articulation points?
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Everything I've ever seen mentioning DOF refers to absolute reference points (a focus, if you will, or origin) that the range is controlled by. In terms of articuation, each DOF corresponds to a joint, which is a fixed focus point that the range (...) (23 years ago, 20-Nov-02, to lugnet.robotics)
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| | RE: articulation points?
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(...) However, a device is made up of several objects. Each component, if treated separately, has six degrees of freedom. Thus each component of, for example, the human arm (reduced to an upper arm, lower arm, and hand) has 6 DOF, for a total of 18. (...) (23 years ago, 20-Nov-02, to lugnet.build.mecha, lugnet.technic, lugnet.robotics)
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| | Re: articulation points?
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(...) Oh? Hmmm...do tell. (...) Right! I see. In my own way I work around certain "movements" or joints by making two separete joints cover the same envelope or Area or Control. I mean in that, for example. The Arms of my Super Mech-Bot don't have (...) (23 years ago, 20-Nov-02, to lugnet.build.mecha, lugnet.technic, lugnet.robotics)
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| | Re: RIS 1.5 $99
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"Jeroen Stap" <lego-robotics@crynwr.com> wrote in message news:012501c29015$0d...ntiumIV... (...) You should check BrickLink in a couple weeks.... that is if you don't mind paying for shipping costs. I would be happy to buy a couple extra if there (...) (23 years ago, 20-Nov-02, to lugnet.robotics)
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| | Re: articulation points?
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(...) Pedant's corner: This reminds me of an argument I've had several times, and to be honest have yet to come to a definitive answer. The maximum number of degrees of freedom an object can have in three dimensional space is six; translation in the (...) (23 years ago, 20-Nov-02, to lugnet.build.mecha, lugnet.technic, lugnet.robotics)
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| | Re: BrickOS & Cygwin
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(...) You bet. I've fixed this in CVS so it will be in our next test release. Thanks for reporting it. (This is why we do test releases ;-) Regards, Stephen -- Stephen M. Moraco stephen@debian.org (23 years ago, 19-Nov-02, to lugnet.robotics.rcx.legos)
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| | Spybotics guts
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Gigamesh has experienced exploratory surgery: (URL) a bunch of pictures right now, but better than nothing. The whole endeavor was spawned from the insane idea of using a DV camcorder to take the pictures because I can't seem to hold still with a (...) (23 years ago, 19-Nov-02, to lugnet.robotics)
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| | Re: Legway <-> Segway ??
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Well, I'd like to think Dean Kamen copied my idea, and converted into a life size model which he sells and I make lots of money for each one he sells... But that's not the case. LegWay is only about 1 month old, while Segway is > 1 month old. LegWay (...) (23 years ago, 19-Nov-02, to lugnet.robotics)
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| | RE: RIS 1.5 $99
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Thank you Richard. This tidbit of information just put $20 in my pocket. I called eToys / KBtoys and mentioned this price difference, and received a credit. No questions, no hassle, no nonsense. My appreciation and thanks goes to eToys for their (...) (23 years ago, 19-Nov-02, to lugnet.robotics)
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| | Re: RIS 1.5 $99
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Too bad they don't do international shipping, I would have loved to buy several of them and send them to Holland... :-( Jeroen (...) (23 years ago, 19-Nov-02, to lugnet.robotics)
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| | Legway <-> Segway ??
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Can anybody make it clear for me; what came first? The Legway or the Segway ? For those who don't know what I'm talking about: Legway -> (URL) -> (URL) looks funny. The Segway is too expensive for me, at this time... Legway looks more like something (...) (23 years ago, 19-Nov-02, to lugnet.robotics)
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| | Re: RIS 1.5 $99
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(...) Use the coupon code SEARSTOYS and get $10 off that. Plus they have FREE shipping, so the total cost comes to $90 shipped! Now you can truly enjoy! Ram (who bought one) (23 years ago, 19-Nov-02, to lugnet.robotics)
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| | Re: RIS 1.5 $99
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(...) How can they *not* ship to Canada? I was going to buy a few, but no Canadian orders... Oh well. Dave K (23 years ago, 19-Nov-02, to lugnet.robotics)
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| | RIS 1.5 $99
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RIS 1.5 is $99 at KBtoys.com. I've never seen them that cheap! Enjoy! (23 years ago, 19-Nov-02, to lugnet.robotics)
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| | Re: BricxCC release 3.3.6.5 - BrickOS support
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(...) <snip> How does the Spybotics book look? Is it as you hoped? I'm looking forward to getting my hands on a copy--may have to drive to Owen Sound just so I can see it! No SCUBA diving in November, probably not too much in Dec. either--maybe next (...) (23 years ago, 19-Nov-02, to lugnet.robotics, lugnet.robotics.spybotics)
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