 | | RoboLab updates
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If you only read the Robolab newsgroup then you may have missed a helpful post that did not appear in the RoboLab newsgroup. If so, then look at: "Robolab 2.5 patches" (URL) (23 years ago, 10-Apr-02, to lugnet.robotics.rcx.robolab)
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| | Re: Light Sensor help
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(...) Well, I can think of lots of reasons why you might want trig - if you know what direction you are moving in and how far you've travelled, trig will let you figure out where you are relative to where you started. Using an NQC lookup table isn't (...) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | Re: Light Sensor help
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Yuck How much time is the brick spending sleeping then? Roland (...) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | Re: Light Sensor help
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(...) Yes, it all appears to be synchronous. However, only one bytecode instruction is run in any given 3ms; any active tasks interleave their instructions. If you have two tasks running, they will each be getting an instruction every other 3ms. If (...) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | Re: Light Sensor help
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"T. Alexander Popiel" <lego-robotics@crynwr.com> wrote in message news:20020409200644....eep.com... (...) time (...) loop (...) I did some similar tests and found similar results. The results held up well up to about 3 tasks, but by the time we (...) (23 years ago, 9-Apr-02, to lugnet.robotics)
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| | Re: Overcharged NiCd Batteries?
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Aha, I know nothing about Handyboards, only about NiCads. I don't see why you need a larger power supply to charge slightly larger cells. Your handyboard is probably only drawing about 75 to 100 mAh to charge at 50 mAh, so a bigger power supply (...) (23 years ago, 10-Apr-02, to lugnet.robotics.handyboard)
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| | Re: Overcharged NiCd Batteries?
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I'm sorry, I didn't explain myself well enough. I meant to say that I used the 500mA 12V power supply (block AC to DC transformer) by connecting it to the handyboard. From the specifications, the handyboard is supposed to be able to charge 800mAh (...) (23 years ago, 9-Apr-02, to lugnet.robotics.handyboard)
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| | Re: Light Sensor help
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(...) Wow! That is very interesting. I wonder if the whole thing is synchronous and based on the 3mS sensor read cycle? This would mean that every process gets one of its byte codes "done" during this periodic 3mS spring-clean cycle. I guess the (...) (23 years ago, 9-Apr-02, to lugnet.robotics)
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| | BricxCC release 3.3.4.5
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I've released another version of BricxCC. This release fixes a couple minor bugs. The Code Explorer feature wasn't processing a file when it was first opened (it was waiting until the first change was made). That should work correctly in this (...) (23 years ago, 9-Apr-02, to lugnet.robotics.rcx.nqc)
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| | Re: Error Message
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(...) I don't know if you are using BricxCC or not, but I get a single error when I try to compile this line of code if the target is set to Scout or Cybermaster. If I turn on the NQC 1.x compatibility mode via the Preferences dialog I get two (...) (23 years ago, 9-Apr-02, to lugnet.robotics.rcx.nqc)
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| | Re: Light Sensor help
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Interesting this is being discussed now. I wrote a chunk of code at the weekend (NQC) to allow me fine control over the motors. Basically, you give each one a number from 0-100, call it N. The drive task counts ticks from 0-99 and ensures the motor (...) (23 years ago, 9-Apr-02, to lugnet.robotics)
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| | Re: Overcharged NiCd Batteries?
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Jeremy, You hooked it straight to a 12V power supply? That's kind of a brutal way to charge NiCad's. Who knows what that's going to do. If it's regulated at 500mA, then it should take just a little over two hours to charge a 1000mAh pack, which is a (...) (23 years ago, 9-Apr-02, to lugnet.robotics.handyboard)
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| | Re: Handy board for sale
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For how much are you willing to sale it? _José (23 years ago, 9-Apr-02, to lugnet.robotics.handyboard)
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| | Re: Light Sensor help
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(...) Yes, I just recently did some timing tests, using that exact method. Each bytecode takes 2.9 +/- .2 ms to execute, as near as I can tell. This appears to be independent of which bytecode it is (though I did not test any that I really expected (...) (23 years ago, 9-Apr-02, to lugnet.robotics)
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| | Handy board for sale
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I would like to sell a working handyboard to anyone interested. It works fine I just don't have time to play with it anymore. (23 years ago, 9-Apr-02, to lugnet.robotics.handyboard)
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| | HRMUG Does SUMO
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The Hampton Roads Mindstorms Users Group (HRMUG) is sponsoring a series of SUMO-theme meetings and exhibitions during the second quarter. Our meetings are held the third Saturday of each month from 2-4 PM. April's meeting will be at the Pretlow (...) (23 years ago, 9-Apr-02, to lugnet.robotics.events, lugnet.loc.us.va.new, lugnet.loc.us.va.nor, lugnet.robotics.events)
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| | Overcharged NiCd Batteries?
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Overcharged NiCd Batteries? Hello, I recently built a handyboard and bought a set of 8 1000mAh NiCd batteries for it. I charged the batteries using the handyboard and a 12V 500mA DC adapter from radio shack. I only charged the batteries for (...) (23 years ago, 9-Apr-02, to lugnet.robotics.handyboard)
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| | Re: Light Sensor help
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I am posting this to the general robotics newsgroup (I hope) (...) The answer to this bit is easy - the RCX reads the sensors once every 3 mS under the Lego firmware. (I have no idea what the LegOS kernel does.) The purpose of this post however, is (...) (23 years ago, 9-Apr-02, to lugnet.robotics)
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| | Re: Light Sensor help
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(...) I had a similar problem using RoboLab. I had a task that looped and checked the light sensor once in each loop. If the light sensor changed within the loop but NOT at the time when the check was made it would be missed. I replaced it with a (...) (23 years ago, 9-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: Light Sensor help
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I’ve never had any problems with the light sensor reading fast enough, and I have a robot that runs pretty fast. How are you trying to follow the line? Maybe there’s a problem with your conversion between NQC and LegOS. I’d be glad to offer (...) (23 years ago, 9-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: 393 pre-technic parts
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(...) Yes, you're right. (...) Yes. (...) Me thinks 2x4 swiss cheese brick is not so bad after all. One thing I wonder is if anyone used them for bracing before the technic era. At that time my mechanical contraptions had a strong tendency to fall (...) (23 years ago, 9-Apr-02, to lugnet.robotics, lugnet.technic)
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| | RE: Discontinuous motion.
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Here are some quick pics of the new gears: (URL) my apologies for the crappy photos... but I think you'll get the idea. There are some other parts of interest in the Bohrok sets that may be useful... especially if someone is trying to make circular (...) (23 years ago, 8-Apr-02, to lugnet.robotics)
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| | Re: Light Sensor help
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The hardware can get a light sensor reading every 1 mS. Is the process that is reading the light sensor at a high enough priority? Kevin "Nathan Nesbit" <natenez@hotmail.com> wrote in message news:Gu7zno.41A@lugnet.com... (...) issue (...) motor (...) (23 years ago, 9-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: 393 pre-technic parts
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(...) Why not just holes? That's what standard technic bricks call them. Though maybe it needs some indication that it has holes in 3 directions 8?) ROSCO (23 years ago, 9-Apr-02, to lugnet.robotics, lugnet.technic)
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| | RE: Light Sensor help
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Try replacing the batteries -----Original Message----- From: news-gateway@lugnet.com [mailto:news-gateway...ugnet.com] On Behalf Of Nathan Nesbit Sent: Sunday, April 07, 2002 8:25 PM To: lugnet.robotics.rcx....lugnet.com Subject: Light Sensor help (...) (23 years ago, 9-Apr-02, to lugnet.robotics.rcx.legos)
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| | Light Sensor help
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I'm a new legos user and I'm trying to get my first app working. The issue appears to be that the light sensor value isn't getting updated as frequently as I expected. When I slow down the motors my line tracking program works fine. I speed it up (...) (23 years ago, 7-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: 393 pre-technic parts
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(...) To my mind, axle holes are + shaped. Perhaps "axle bearing holes"? --Bill. (23 years ago, 8-Apr-02, to lugnet.robotics, lugnet.technic)
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| | Re: Robolab programming for Official remote message buttons
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(...) The buttons generate mail with the integer value corresponding to the buttons on the remote. (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.robolab)
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| | Re: The PRGM key - THANKS!
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(...) Have you tried the lnp checksum optimization patch? This could help, too Mike (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: The PRGM key - THANKS!
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"Michael Obenland" <obenland@t-online.de> wrote in message news:Gu9BHq.BEv@lugnet.com... <snip> (...) control. (...) influence (...) have (...) But I (...) Mike, I had experienced intermittent problems with downloading programs until I changed the (...) (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: Release candidate legos-0.2.5.1 avail for testing
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(...) dll doesn't work with serial tower in slow mode. In util/dll-src/rcxtty.c please fix the line setting the ios flags to: ios.c_cflag = CREAD | CLOCAL | CS8 | (highspeed ? 0 : PARENB | PARODD); Mike (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: The PRGM key
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(...) When you use firmdl3, changing anything inside the lnp handler won't do anything useful! The code resposible for fast downloading is the small assembly code transfered before the legOS download starts. (...) Don't do that! legOS 0.2.5 ran on (...) (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: The PRGM key - THANKS!
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Wow! I am so glad this worked. I entered a bug for the program.c changes earlier today (on sourceforge) and will enter one for the readme change. (However, we could solve the problem by updating dll as well... to find the parameter in any location) (...) (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: The PRGM key - THANKS!
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(...) Fine to hear you are up and running. (...) No, I don't think so. In fact, using dll with the right parameters does the trick. Sorting out what you have written, I think you downloaded all your programs to slot 0, your old program was deleted (...) (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: The PRGM key - THANKS!
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I tried doing "dll -pX prog.lx" instead of "dll prog.lx -pX" and it works! Thanks. It would be good if Joe Wooley's alteration to program.c could be included in the next version of legOS because it does the trick with the "keeping alive" and "error (...) (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.legos)
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| | Robolab programming for Official remote message buttons
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Any idea how to get the RCx to respond to the lego remote control message buttons; marked 1-3 on the top of the remote control? Speedy help would be appreciated. (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.robolab)
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| | Re: The PRGM key
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Well, I am sorry to say that I don't have a solution for that problem. I haven't experienced this before. I am glad to hear that the program download doesn't fail anymore; and I will request that 0.2.6 contains a similar fix. Ok, another suggestion: (...) (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: The PRGM key
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I don’t know if it makes any difference, but I always put the destination before the name of the program. Ex: “dll -p1 hello.lx” Steve (...) (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: What happened to Spirit.ocx?
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(...) Hi Kenny, Spirit.ocx can only be used with the serial tower. RIS 2.0 contains a USB-tower, so spirit.ocx doesn't work anymore. Have a look at this message. (URL) a replacement for spirit.ocx is announced. Regards, Rainer (23 years ago, 8-Apr-02, to lugnet.robotics.rcx)
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| | What happened to Spirit.ocx?
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Hello.. I've just upgraded my RIS 1.0 to version 2.0 and it appears Lego have stopped using the Spirit.ocx. I'm a little confused, I've used the spirit.ocx within Macromedia Director in the past to write interfaces and programs to control my RCX. (...) (23 years ago, 2-Apr-02, to lugnet.robotics.rcx)
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| | Re: The PRGM key
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Sorry, no. That's the one difference; it no longer says error deleting program and I don't get any errors when downloading to the RCX. I always use firmdl3 -s because using just firmdl3 on its own never works for me. I still have the problem that (...) (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.legos)
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| | RE: Discontinuous motion.
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Could you post some pictures of these new gears? jkca Robert Limbaugh <rlimbaugh@greenfiel To: "'sjbaker1@airmail.net'" <sjbaker1@airmail.net> dgroup.com> cc: Lego Robotics <lego-robotics@crynwr.com> Subject: RE: Discontinuous motion. 04/03/2002 (...) (23 years ago, 3-Apr-02, to lugnet.robotics)
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| | Re: The PRGM key
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After making the change, do you still get "Error deleting program"? or other errors while downloading the program? Your assumption is correct, it will only switch to a program slot if there is a valid program there. I had problems sending programs (...) (23 years ago, 8-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: 393 pre-technic parts
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(...) I'd call them axle holes, as they won't hold a pin, and they are from the pre-technic era. Jürgen (23 years ago, 7-Apr-02, to lugnet.robotics, lugnet.technic)
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| | Pcode loading woes (on Mac)
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Dear Handy Board users, I have just assembled a Handy Board from components + PCB, and have verified that the 68HC11 is operating, the memory chip is receiving pulsing on its address / clk lines, and that the Charger / Serial board is working. (...) (23 years ago, 7-Apr-02, to lugnet.robotics.handyboard)
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| | Re: Error Message
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The only thing I could think of is if NQC thinks you are generating code for some other device (e.g. CyberMaster). Try adding -Trcx2 to the command line to force NQC to target RCX2. If that doesn't fix it, email me the program and I'll take a look. (...) (23 years ago, 7-Apr-02, to lugnet.robotics.rcx.nqc)
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| | Re: The PRGM key
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I just tried this and it has no effect. By the way, I'm using Cygwin B20 under Windows 98 with a com port IR thing, and LegOS 0.2.5. The same thing happened using WinLegOS and 0.2.3. Pressing the PRGM key has no effect in any situation - I assume it (...) (23 years ago, 7-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: The PRGM key
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I had similar problems when using legOS with CONF_TM defined in boot/config.h What I found was that the lnp handler was not getting enough processing time and was missing some data at times. Try the following fix and let me know if it helps. If so, (...) (23 years ago, 7-Apr-02, to lugnet.robotics.rcx.legos)
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| | Robot Controller 1.5
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I have released a new (beta) version of Robot Controller, the ideal companion to NQC for Mac OS X. This version adds support for serial IR towers (provided you have a working serial port) and makes several other minor improvements. Download it now (...) (23 years ago, 7-Apr-02, to lugnet.robotics.rcx.nqc)
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| | The PRGM key
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I quote from the original readme: "Type "dll demo/helloworld.lx". If all is well, it should be automatically relocated and transmitted to program slot 0. Press the RUN key to run. The program stops automatically. Type "dll demo/rover.c -p1" to (...) (23 years ago, 7-Apr-02, to lugnet.robotics.rcx.legos)
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| | MD5 available (was: RCX as a PGP engine)
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I just put my java MD5 port for lejos on the web: (URL) for the popups, Tripod....) It's a terrible hack, but thanks to that memory footprint is low and it does not leak! Let me know if you find it useful. Have fun, Bart. (23 years ago, 7-Apr-02, to lugnet.robotics.rcx.legos, lugnet.robotics.rcx.java)
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| | Re: 393 pre-technic parts
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(...) My sister used to do that too 8?) (...) Ben Whytcross, a local Melbourne Lugnet member has christened these bricks "swiss cheese bricks" 8?) ROSCO (23 years ago, 7-Apr-02, to lugnet.robotics, lugnet.technic)
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| | B.Sc in LEGO
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Hi all. I'm a student in my 4 year, learning electronics. For my final project, I got an approval to make a project with LEGO Mindstorm. Basically it's a standard robotic hand that picks up LEGO parts, recognize them (using Image processing & (...) (23 years ago, 7-Apr-02, to lugnet.robotics, lugnet.robotics.rcx)
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| | WinLNP and USB
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Hi All, I've been trying to send data to my PC using WinLNP and the USB tower. Now, I've modified WinLNP to use the USB tower and it seems to work. I can get the demo RCX program to run and it recognizes I've sent it a byte. I can also get the RCX (...) (23 years ago, 7-Apr-02, to lugnet.robotics.rcx.legos)
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| | WebBrick
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Hi, has anyone got WebBrick (2.4 from Amnon Silverstein) to work with Windows XP? If so, what do I need to do to get it up and functioning, since it doesn't respond at all on my Windows XP platform. Many thanks! Da Byte (23 years ago, 7-Apr-02, to lugnet.robotics)
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| | Re: 393 pre-technic parts
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"Steven lane" <steveroblane@aol.com> wrote in message news:Gu4Eoz.65x@lugnet.com... (...) it'sreally a great coincidence that you made this post when you did. i had dinner with my mom and she had found all of my childhood Lego pieces. while sorting (...) (23 years ago, 7-Apr-02, to lugnet.robotics, lugnet.technic)
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| | Release candidate legos-0.2.5.1 avail for testing
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Details regarding release content, download instructions and how to provide feedback are at (URL) look forward to hearing from you regarding how it works for you and/or what needs fixing before we release it as 0.2.6 Regards, Stephen for the legOS (...) (23 years ago, 6-Apr-02, to lugnet.robotics.rcx.legos)
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| | Re: New AFOL
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I just saw a few of those at Wal-mart the other day. It would be a way to introduce a soccer ball into a creation while maintaining the pure-lego concept <grin>. But a Killough platform needs 6 wheels, and they aren't actually spherical- they are (...) (23 years ago, 6-Apr-02, to lugnet.robotics)
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| | Re: New AFOL
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(...) Maybe you can find 3 of the "Soccer Bus" sets which come with a soccer ball, and make a *really* large Killough platform! :-) Welcome to LUGNET, BTW... --Bill. (23 years ago, 6-Apr-02, to lugnet.robotics)
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| | Re: AFOL new to LUGNET - many MOCs
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(...) [...] Your bipeds are brilliant. I'm amazed. But there's one problem I found with your site: the movies for Pneuma-Ped don't work. Please fix those links as I'm anxious to see it in action! --Bill. (23 years ago, 5-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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(...) <snipped very interesting description> Just to chime in here quickly, you could use the lego small chain links instead of tons of gears to create gear trains. Advantages: gearing ratios are retained as in trains, backlash/chatter is reduced (...) (23 years ago, 5-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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(...) (23 years ago, 5-Apr-02, to lugnet.robotics)
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| | RCX driven Pneumatic Locomotive
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I just saw this one on Lego site: (URL) worth looking at imho... Philo (23 years ago, 5-Apr-02, to lugnet.robotics) !
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| | Re: RIS parts questions
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I wouldn't consider it "stuck". I have a few of these tougher than normal pins and they can be very handy! Apart from the obvious external difference, the wall thickness seems greater meaning the little hole through the middle is slightly smaller. (...) (23 years ago, 5-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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Wow ! bulky indeed, but true Geneva mechanism... Congratulations ! Philo (...) (23 years ago, 5-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion. - Geneva-like mechanism
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I too used a detent mechanism to stabilize this Geneva-like system as I couldn't find a way to achieve the original interlock. Photos and movie at (URL)I've uploaded a simple detent mechanism which can be used to stop shafts (...) (23 years ago, 5-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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Steve, I don't know if this will help you at all, but I certainly had fun with it. I put together a (quite bulky) version of the Geneva Wheel. (URL) Baker" wrote in message news:3CAB63F5.7A5CF2...ail.net... <snip> (...) you (...) moves (...) I don't (...) (23 years ago, 5-Apr-02, to lugnet.robotics)
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| | Phantom - The Spirit.ocx replacement is now available.
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I am happy to announce that Phantom.dll, a replacement for the Spirit.ocx is now available for general download. Phantom implements the complete functionality of the Spirit.ocx with the exception of the CyberMaster only calls. Release Candidate 1 is (...) (23 years ago, 5-Apr-02, to lugnet.robotics.rcx, lugnet.robotics)
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| | Re: Discontinuous motion.
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I combined Robert Munafo's stepper motor ((URL) and Rob Limbaugh's partial rotation ((URL) to get a working prototype of a base 5 odometer. Hope to post a pic tomorrow. (...) (23 years ago, 5-Apr-02, to lugnet.robotics)
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| | RE: RIS parts questions
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No, I have about a dozen of these that I have come across these in genuine LEGO sets. But they must not have been available very long, because they are rare. The missing center slot is the most obvious cosmetic difference. If you get one of these in (...) (23 years ago, 5-Apr-02, to lugnet.robotics)
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| | Re: RIS parts questions
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(...) I got two old sets on eBay, 8035 and 8044. I think it might have been one of those two sets that it came from. I noticed another difference- they don't have the slot in the middle. I'll take a picture in the morning and send it to you. Of (...) (23 years ago, 5-Apr-02, to lugnet.robotics)
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| | Re: RIS parts questions
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(...) Really! I can't find any of those in my collection - but I'll mention this on my 'pegs' page. Thanks for the info! ---...--- Steve Baker ---...--- Mail : <sjbaker1@airmail.net> WorkMail: <sjbaker@link.com> URLs : (8 URLs) (23 years ago, 5-Apr-02, to lugnet.robotics)
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| | Re: New AFOL
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Well, as soon as I get a load of #6 axle connectors I'm building a large Killough platform with the big spherical wheels. Then I can see how a Killough platform works without the square-wheel effect my current one has. In the meantime, I just got 5 (...) (23 years ago, 5-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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Wow a Geneva Mechanism, very impressive! Man o Man! That is just wild. Legomaster www.mylegomaster.com (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | Re: New AFOL
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Hi Benton, welcome, ain't it great! I checked out your site and your Robots, very cool. Interesting challenges you have picked. Get's my technic mind going. Good luck and I hope to see more of your work. What do you plan to make next? Legomaster (...) (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | Re: lnp adressing
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(...) (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | New AFOL
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Hi, I've been lurking on lugnet.robotics for a couple months now, with just a few odd comments here and there. You're probably wondering who the heck I am. Well, I'm a new 40 year old fan of Legos. Although I've been an admirer of legos all my life, (...) (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | Competition III Web Cast
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The Robotics Competition at Ivy Tech State College in Evansville Indiana is going to be web cast on Friday 5 April from 12:30 to 3:00pm Central Standard Time. To view the "Search and Destroy" competition, point your browser to: (URL) general (...) (23 years ago, 4-Apr-02, to lugnet.loc.us.in.eva, lugnet.robotics)
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| | SouthWest Indiana Competition III (Search and Destory) Web Cast
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The Robotics Competition at Ivy Tech State College in Evansville Indiana is going to be web cast on Friday 5 April from 12:30 to 3:00pm Central Standard Time. To view the "Search and Destroy" competition, point your browser to: (URL) general (...) (23 years ago, 4-Apr-02, to lugnet.robotics.events)
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| | lnp adressing
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I've saw that if i change the HOSTADDRESS in the config.h, I then I can't download new program cause legOS programm trasfer use the lnp adressing message .... Anyone have a solution ? I've remark (i think) that legOS don't take message that the (...) (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | Re: Robot Ant and Data logging
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(...) Hi Mike, Unfortunately there is no possibility under Robolab 2.5 that the RCX might itself access the data collected in the log. Robolab 2.5 is based on LEGO-firmware 2.0, which has many new features, but not this one. If you want to do your (...) (23 years ago, 4-Apr-02, to lugnet.robotics.rcx.robolab)
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| | Re: Discontinuous motion.
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I've uploaded a simple detent mechanism which can be used to stop shafts creeping round when they're not supposed to. The only drawback is it can get rather noisy :) (URL) black shape at the top is supposed to represent an official Lego rubber band. (...) (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | lnp addressing communcation
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Does someone can send me an example of LNP adressing message with 2 RCX ? I have some problem with it !! nanobapt ---...--- "la cuillère n'existe pas" (URL) : 94470030 (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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Steve, If the precision is due to the axe slipping while not being driven, you could consider using a pully off a micro-motor. It has a friction slip mechanism at one end, and an axle hole at the other. You could use the axle hole to stablize the (...) (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | Re: Discontinuous motion.
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Nice work! Could you potentially use a ratchet mechanism or maybe a step motor set up (with a rubber band) to help with the "coating" problem? Jona ----- Original Message ----- From: "Steve Baker" <sjbaker1@airmail.net> To: "Kevin L. Clague" (...) (23 years ago, 4-Apr-02, to lugnet.robotics)
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| | 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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