 | | Re: Lego IR Remote - What is max send rate?
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(...) I am not exactly sure, but you might consider using a vector in the robot so if a key is missed it continue on the same vector. In order to accomplish this you would need to have messages for keypresses and keyreleases. So if the robot does (...) (23 years ago, 27-Apr-02, to lugnet.robotics.rcx.legos)
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| | Lego IR Remote - What is max send rate?
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I'm working on the motor key handler for legOS support of the IR remote. I'm looking at service rates of keypresses at the remote. In studying how The Mindstorms OS responds to the remote I noticed that holding the key down (for motor keys) kept the (...) (23 years ago, 27-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: 4 Legged Robot; Steering Help
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(...) Hi.. I just recently finished a 6 legged hexapod. Take a look at (URL) this could help. -Brian (23 years ago, 27-Apr-02, to lugnet.robotics)
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| | Re: 4 Legged Robot; Steering Help
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gigamax, The turntable in the body is sure to work. It is a sure fire method. Mind you, I've never made a quadraped. I work on bipeds. What might be a more interesting concept is two turntables on each front foot. If you can power the two front feet (...) (23 years ago, 27-Apr-02, to lugnet.robotics)
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| | Re: WELCOME to lego-robotics@crynwr.com
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Jeremy, I was able to get rid of that splash screen by digging around in the Registry. I'd tell you where it was if I remembered. Probably something like localmachine/softwar...ws/startup or something. (...) (23 years ago, 27-Apr-02, to lugnet.robotics)
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| | Re: Control lego motors and rotation sensors
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(...) I'm not so sure about motor design, there are quite a few motors that block (one in ten for me). Since wou use RoboLAB it may rather be the LEGO firmware that protects your motors, it contains code to limit the speed of switching the motor. (...) (23 years ago, 27-Apr-02, to lugnet.robotics)
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| | 4 Legged Robot; Steering Help
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I am working on a project to build a 4 legged robot. The legs will be fairly articulate although I have not yet figured out how to turn a 4 legged robot. I have read information suggesting to put a turntable in the body, but without a working model (...) (23 years ago, 20-Apr-02, to lugnet.robotics)
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| | Re: WELCOME to lego-robotics@crynwr.com
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I have yet to see a single problem with RIS 2.0 software on Windows 2000. I have done VB development with the tower/rcx on the same platform. I have used exclusively Windows 2000 for all of my development and robotics without any problems. The only (...) (23 years ago, 27-Apr-02, to lugnet.robotics)
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| | Re: Control lego motors and rotation sensors
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(...) The 'on-brake-on' method of speed control is VERY useful. When implemented it looks and acts like a stepping motor. For an example, go to my website at (URL) and navigate to my Injection Molding Factory. There is a motorized air valve with a (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: Sharp GP2D12 Distance Measuring Sensor
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(...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: Control lego motors and rotation sensors
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(...) Oh, it probably does have that option; if nothing else, you can change the code to do it that way. I simply find the ON/BRAKE modulation to be more useful, so haven't bothered looking for an alternative. - Alex (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: Control lego motors and rotation sensors
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Wow! I hope LegOS has the option to use On and Float too. I was planning on migrating to LegOS soon, but if it does On and Brake, it is to be avoided. That technique simply burns battery power! JB (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: How to orientate a robot?
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Fredrik, I notice you are planning on using MATLAB/Simulink for simulating transition diagrams and testing your design. Did you know that if you have Real-Time Workshop you can generate auto-code for the MindStorm it self without having to recode or (...) (23 years ago, 26-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: Sharp GP2D12 Distance Measuring Sensor
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(...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: Control lego motors and rotation sensors
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(...) The standard firmware does pulse-width modulation alternating between ON and FLOAT. What I think Jerry is suggesting is pulse-width modulation alternating between ON and BRAKE (which does control speed quite handily, and is what legOS does). - (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: Control lego motors and rotation sensors
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(...) That's not really any different from what the RCX's firmware does though. You are doing pulse-width modulation and so does the firmware. The only difference is that you are using a longer time-constant. ---...--- Steve Baker ---...--- Mail : (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: Control lego motors and rotation sensors
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Changing the motor 'speed' (pulse wave modulation) really only changes the torque. It will only change the speed if the motor is heavily loaded. Another technique that is more successful is to create a control loop in which the motor is on for 5 (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: Control lego motors and rotation sensors
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(...) It's possible - but if you crank up the resolution you soon run into the problem that your software cannot run fast enough to keep count of the pulses. Also, it's hard to distinguish clockwise from anticlockwise rotation with a (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: WELCOME to lego-robotics@crynwr.com
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For the robotics class I teach (& FLL team), I have RIS 2.0 (& 1.5) on multiple computers running Win98 and/or Win2000. No problems with either OS. Called Lego for support with a sound problem (had to get a new sound card compatible (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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| | Re: Control lego motors and rotation sensors
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(...) There are commands for the RCX to use different 'power levels' - which will translate into a change in speed if there is sufficient load. (...) lego (...) No - but you can use a gear train to make the rotation sensor spin more than once for (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
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