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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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