 | | Re: Pneumatic Pump Testing Goes Hi Tech
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(...) Sure - I made a rather ugly version of it including limit switch for my skid steer loader model. There is a picture here; I don't actually think many modifications other than replacing the small and large pully with 8 and 40 tooth gears were (...) (24 years ago, 10-Apr-01, to lugnet.robotics, lugnet.technic, lugnet.build, lugnet.dacta)
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| | Re: Pneumatic Pump Testing Goes Hi Tech
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(...) I don't know how or why but I don't seem to have come across it. I guess I could try to build one but it'll help if you could give me a link or reference to it. (...) Well, I can have a go at it. But really, with this pressure sensor thing, (...) (24 years ago, 10-Apr-01, to lugnet.robotics, lugnet.technic, lugnet.build, lugnet.dacta)
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| | Re: Pneumatic Pump Testing Goes Hi Tech
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(...) Nice work as ever! One type of pump I've not seen you test yet is a varation of Michael Powell's using an 8 tooth gear onto 40 tooth gear reduction rather than the belt drive, as this seems to improve performance significantly. How about a (...) (24 years ago, 10-Apr-01, to lugnet.robotics, lugnet.technic, lugnet.build, lugnet.dacta)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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(...) Doh!. And I just took this in school (in fact, am going to write an exam which this will appear on (methinks) thisafternoon. It's called "Locked Train", and allows for more even power distribution across multiple gears in a gearbox. Hmm...Now (...) (24 years ago, 10-Apr-01, to lugnet.robotics)
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| | Pneumatic Pump Testing Goes Hi Tech
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Hi, fellow pneumatics fans Ever since the RCX Controlled Air Compressor Tester was posted, there have been many suggestions for it's improvement, in particular to linearize the tracing. More importantly, several people have commented that it was, (...) (24 years ago, 10-Apr-01, to lugnet.robotics, lugnet.technic, lugnet.build, lugnet.dacta) !
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| | Re: Programming the RCX...
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(...) I love responding to my own post. I just checked out you website and see you are an explorer with an open mind (at least an open source mind). I, however, am an ass. Sorry (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: Elimating the need for the IR tower
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What happened with this John B. ? Where I can get some schematics ? It would be great if I could build an Ir Tower (or something to program my scout), since I can't get anybody to ship this things to where I live (Argentina) Tia, (...) <> (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: New Outdoor Robot Photos
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(...) Thanks. There was actually alot of development (and a bit of luck) involved in the color schemes I used. The RCXbug was developed for my biology thesis, and since the RCX is yellow anyway, I decided to give it aposematic (warning) coloration, (...) (24 years ago, 9-Apr-01, to lugnet.robotics, lugnet.publish.photography)
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| | Hand-Tech
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Gents, I've been getting some questions on the Tech for the hand I developed, and that's good because I made a diagram! Check it out on Brickshelf: Hand tech: (URL) Folder: (URL) Status: (URL) hand you see here incorporates the Torque / Slip Gear as (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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Mmmm, you are indeed respectful. Thanks, wow, So when we have made our masterpieces we sit back and enjoy our toys, for our mind, body and soul extensions. I like that! Very good. Man's gotta have his toys ya know. or The more money the bigger the (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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Sorry Eric. I certainly didn't mean the word "toy" to be derrogetory in any way. Must be a cultural thing. My job is to create room sized "toys" which weigh several tons, contain thousands of kilowatts of potential and/or kinetic energy, and require (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: Programming the RCX...
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(...) I have hard time seeing how taking simple constructs and organizing them into something which exhibits a behavior not anticipated by the author of the constructs is not programming. How does it differ from arranging textual tokens in a (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: Programming the RCX...
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oops, should have read the rest of the thread ;-( sorry (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: New Outdoor Robot Photos
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(...) These are great looking robots and photographs, I think the way you have used colour on the robots is fantastic. The quality of photographs is making me want to "upgrade" my digital camera ;-) Jennifer Clark (24 years ago, 9-Apr-01, to lugnet.robotics, lugnet.publish.photography)
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| | Re: Programming the RCX...
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In addition there are versions of ladder logic which are used in PLCs in millions of industrial applications. I would classify ladder logic as visual. There are also some UML (Unified Modelling Language) applications such as Rhapsody that allow you (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: Programming the RCX...
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(...) You can try leJOS from (URL) It is written in Java, and allows you to write programs in Java. I have written an interface/editor for leJOS called lVI available at (URL) A new version fixing some big problems should be out soon. Andy (...) -- (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | The Java module you've been waiting for: JStamp
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Please pardon this announcement of JStamp - full details at (URL) have a closet full of Lego Technics, Droid kits, etc which we are itching to automate with JStamp. We hope to have some operational at JavaOne and, in future (not enough time to (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | RE: Chat server is up! (was: Need for chat server?)
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AH! :) ok, thxs. I'll be hanging around, time permiting :) mc. (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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Rrrrrrrrr..... (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: Programming the RCX...
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(...) National Instruments would disagree with you. Their product Labview is a tremendous success, requiring a marketing machine the size of Unigraphics'. Plenty of "real" world programs have been built with Labview. For those not familiar: Labview (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: Programming the RCX...
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(...) Connecting data paths between conventionally programmed chunks is not the same thing as "programming". (...) Yeah - *theoretically* - but in practice, people don't do that. (...) But it's still not a visual programming language...it doesn't (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: Programming the RCX...
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(...) I have to disagree. I personally have three fairly significant robotic applications in the field which were developed using a visual programming language. I must confess that the language was not purely visual. The software IC components were (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: Programming the RCX...
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(...) Ah - OK. (...) I think that might just be overkill for a system as simple as the RCX. There are only three motor outputs - and you have no direct control over speed or angles - you can only say "forwards", "reverse", "brake" or "freewheel" (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: Programming the RCX...
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Steve, Thanks for the reply. I was thinking more along the lines of abstraction and simplification versus a pure visual language. Something that would make programming an RCX alot easier with respect to range checking for valid values, such as motor (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Re: Programming the RCX...
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(...) There certainly is some kind of a Java implementation for RCX. I havn't used it though...most people start off with NQC (Not Quite C) which is a very good starting point...then if you need more, dump the RCX firmware and replace it with (...) (24 years ago, 9-Apr-01, to lugnet.robotics)
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| | Programming the RCX...
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Hello to All, I don't have a LEGO MindStorm Robot to play with yet :>(, but I've been doing a lot of research trying to learn the various techniques used to program the RCX. Do any of you use or plan to use Java to develop your RCX programs? I could (...) (24 years ago, 8-Apr-01, to lugnet.robotics)
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| | Windows 2000
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I have the Lego Mindstorms Robotic Invention System 1.5 and I was trying to run it in Win2k but am having problems with Direct Player. Let me just give you a background: 1. Before I installed RIS 1.5 in my laptop, I already have QuickTime 4.0 and (...) (24 years ago, 8-Apr-01, to lugnet.robotics)
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| | Re: New Outdoor Robot Photos
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(...) That would be typical rural Tennessee driveway. I picked it because it looks similar to a primary succession biome, and was alot more interesting to look at IMO than plain old grass. (24 years ago, 8-Apr-01, to lugnet.robotics)
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| | Re: New Outdoor Robot Photos
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Nice images, they should go nicely with your excellent site. I am curious as to the ground that is in those images. Looks like broken gravel with grass or some other green growing through. I am wondering if this is your back yard, or drive way, or (...) (24 years ago, 8-Apr-01, to lugnet.robotics)
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| | Re: calculating sensor resistance (Ohm's Law)
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Michael, As usual, you are correct. Thanks for pointing out my error. - pete. (...) Techno-stuff Robotics (URL) for FUN ! (24 years ago, 8-Apr-01, to lugnet.robotics)
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| | Chat server is up! (was: Need for chat server?)
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Hello all, I finally found a free moment to set up the chat server for all of us lego and robotics maniacs. My company is going through a merger with another .com so things are a bit busy right now ... I haven't had much time to mess with my lego (...) (24 years ago, 8-Apr-01, to lugnet.robotics)
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| | Re: Length of Diagonal Spreadsheet
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(...) Yes - I have such a table too - but I generated it with a program that automatically rejects unusable combinations to generate a small list of useful diagonals. (...) Ah! That makes more sense. So you mean errors of 0.05 studs - that's a bit (...) (24 years ago, 8-Apr-01, to lugnet.robotics)
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| | Re: Length of Diagonal Spreadsheet (Now in PDF format!)
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Thank you everyone who either offered to make a PDF file or went ahead and made one and mailed it to me. Here is the PDF version of the spreadsheet. (URL) suggest that you print it out and try out some of the diagonals. For the new 12 and 20 tooth (...) (24 years ago, 8-Apr-01, to lugnet.org.us.smart, lugnet.robotics, lugnet.technic)
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| | Re: Length of Diagonal Spreadsheet
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(...) Thanks for the link to your gear spacing site. That is sort of what I was looking for though in my chart I aimed at being more general then just a list of workable gear spacing. My diagonal measurements can also be used to find workable beam (...) (24 years ago, 8-Apr-01, to lugnet.robotics)
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| | Re: Length of Diagonal Spreadsheet
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(...) ---...--- snip ---...--- (...) Gus I can't download the sheet nor can I open it online. If you can email it to me I can convert and return the pdf via email, providing the document isn't too large for your mail box. Dave (24 years ago, 7-Apr-01, to lugnet.robotics)
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| | Re: A couple of questions
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(...) Only by the vocal majority, I think. There has been a recent thread about a sub-group (cult?) of "grinders". I say the end justifies the means here. You might look into FischerTechnik (my spelling may be off). Someone on this newsgroup did (...) (24 years ago, 8-Apr-01, to lugnet.robotics)
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| | Re: Length of Diagonal Spreadsheet
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(...) Er oops :) that's a 2L spacing, same as 24T to 8T or 16T to 16T. (24 years ago, 8-Apr-01, to lugnet.robotics)
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| | Re: Length of Diagonal Spreadsheet
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(...) I'm assuming he's talking about the 12T double bevel gear. Three sets that I know of that have them are the DDK, the Technic 8448 Super Street Sensation and the Technic 8008 Stormtrooper. They have a standard 3L mesh spacing when used with a (...) (24 years ago, 8-Apr-01, to lugnet.robotics)
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| | Re: Length of Diagonal Spreadsheet
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(...) For gear spacings, you might try: (URL) My testing shows that errors as great as 5% are usually no problem for (...) That *can't* be right. The tolerable error for two 40t gears is no different from the error for two 8t gears - so it's (...) (24 years ago, 8-Apr-01, to lugnet.robotics)
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| | Re: program wont stop running
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(...) If the person stops running, then that means the program has stopped. The "Run" button stops a program and turns off the motors. However, when a program finished normally (with nothing more to do), the motors are left in whatever state the (...) (24 years ago, 8-Apr-01, to lugnet.robotics, lugnet.robotics.rcx.nqc)
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