 | | Re: How about ideas for new elements?
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(...) Nah, keep the posts in the main group as a constant source of temptation for the purists :-) I take your point about these mods really coming into play when you have a large collection of parts - when I was young and had a very limited amount (...) (24 years ago, 5-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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(...) You can use those half beveled gears(with the recess) back to back as one gear, and one (maybe 2) crown gears as the gear on the other shaft. It depends on what the setup requires as of gear setup to work. Andy (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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(...) Explain 'Hmmm...' :-) I of course omitted the fact that my solution as described produces no mechanical advantage just a shaft going in the opposite direction. Of course, you can always replace the pair of gears on the second shaft with a pair (...) (24 years ago, 5-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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Hmmm... (...) (24 years ago, 5-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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(...) I was going to say this solution is easy, but then I tried it. There are only two shaft's in this example. As lego don't make don't make a 'double width gear' You'd have to use four to make it in lego. All you'd need is three normal 16 tooth (...) (24 years ago, 5-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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Interesting , but we need one for Lego! I do see what you are saying, and It is an interesting solution,, although a little hard to visualize...Thanks! (...) (24 years ago, 5-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Re: NQC for Palm
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(...) Yes - NQC is developed on a Mac so PowerPC big-endian is actually where most of the testing is done, but I don't recall ever running into an endian problem. One of the builds (for Mac MPW) targets 68K, but with slightly difference options than (...) (24 years ago, 5-Apr-01, to lugnet.robotics)
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| | Re: Lubricating technic turntables
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(...) Before someone ruins their pneumatics..... Brake Fluid will ruin many plastics, will remove paint, and can even damage certain types of rubber seals. The rubber parts in an automotive brake system are made from special rubber that is made to (...) (24 years ago, 5-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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(...) I know of 1 type of zero-lash/anti backlash geartrain. It's hard to put it in words but I'll try. My example assumes there are only 2 shafts but it can be applied to as many shafts as you need. In my example S1 represents our first shaft. (...) (24 years ago, 5-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Question about the UBS
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Is there is any information on what will be contained in the 'Ultimate Builder's Set'? (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: NQC for Palm
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<snip> it's too bad that all of you just HAVE to use a palm OS device. someone a long time ago ported nqc to windowsce and it works fine, i'm able to do on the fly programming and uploading with a first generation device, which i'm actually unhappy (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: Lubricating technic turntables
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<snip> from using different types of yoyos and other things i have found that the best for inert lubricating is silicon lubricant, there are also some other lubes for nylon that i can't think of but i do know that they are out there. some vcr repair (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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(24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: How about ideas for new elements?
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I would like to try using threaded nylon rods. Where can you buy them? I've only used steel threaded rods to restrain large axial forces (e.g. in a crane turntable). I've also used smooth 3/16" bar stock when I needed a very stiff and strong axle (I (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: Scout Commands
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(...) If you use NQC then you can write a small program and load it into the Scout...then it behaves much like the RCX. The Scout has VERY little free memory - but it's enough to allow it to act as a dumb peripheral, turning motors on and off and (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: How about ideas for new elements?
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I applaud 100%! Great work! I like to think that if the Lego designers can have new bits for new models, so can we!!!! I appear to have duplicated just about everthing you've been doing :) As far as the threaded rod business goes; I've been buying (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: List software?
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Doesn't "Reply to Group" only work with New Groups (NNTP), not e-mail lists? And don't ALL e-mail clients have a 'Reply To All' function? Can't you just do that and erase the recipient you don't want (in this case, the sender)? -- V (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Scout Commands
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When you communicate between RCX's you set a number and then use the other end as a sensor to do a certain procedure. Does anybody know what happens when you send those messages to a scout. I know 1 is 'seek dark', 2 is 'seek light and 3 is 'do the (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: NQC for Palm
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(...) i thought of doing something like it, but don't really have the time. (...) i'd use it instead of my computer! (...) i've got very little experience in writing for the PalmOS, but i found it quite easy, specially for this kind of program. i've (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: Lubricating technic turntables
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How about a water-based lubricant instead of petroleum-based? If it's safe for latex...why not ABS? :) Use it sparingly and only as a last resort. Personally, I doubt I would use graphite. Graphite would be a little too messy for me. -Troy (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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"Eric Sophie" <Legomaster@gobi.com> wrote in message news:GB91vJ.21x@lugnet.com... (...) over (...) Ncm. (...) Newtons x cm. Not nano. :) Iain (the metric pissant) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: List software?
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"Russell Nelson" <lego-robotics@crynwr.com> wrote in message news:15049.48238.578...nwr.com... (...) Try Outlook Express (is avaible for Win 9x, Win NT, Solaris, Linux, Unix) This program has a Reply Group button and Reply (to sender) works great. (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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Yes they do lose a little, I guess we always knew that would be the case, I hate to see you not use the gear if it's to loose, reurn it for a new one if you decide somthing really needs it. Also I consider this gear a "back-up" in preventing (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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Oh , right , Newtons , I was saying Nano centameters! thanks....I guess you need a fair amount of gearing and distance to use these gears effectivly along with opposing resistance, I love the way it works in the hand I developed, infact in included (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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(...) Hmm interesting. I only have one clutch gear (the one that came with RIS 1.5), and it is too *loose* to really be at all functional. I've also read that the clutch force tends to drop in them the more they are used. (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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(...) (I think we established that this is Newton centimeters - a force of between two and a half and five Newtons applied at a distance of one centimeter will cause the gear to slip...or half that at 2cm, a third at 3cm and so on). (...) That's (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: Lubricating technic turntables
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Good point, well taken, I'm glad at least 5L axle was produced! (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: Lubricating technic turntables
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(...) That's okay, I'm a purist too. I once spent several frustrating hours completely redesigning the drivetrain on one of my robots so I wouldn't have to trim down four 8L cross axles to 7L. However, when you consider lubricating a turntable (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: Lubricating technic turntables
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You got me pegged, it's a purism thing, I pride myself on never cutting or altering pieces, glueing or lubricating. Just work those pieces and they'll loosen up! Get'em... GRRRRR....Eric (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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(...) Far as I can tell, these are the gears used in the gearboxes in 8880, 8448, 8480, and prob'ly others. ROSCO (24 years ago, 4-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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The CD-Rom does not explaiin how to use this piece, but in an earlier post I wrote: Ok, this is called a "Slip Gear" or "Torque Gear" It is used to prevent over rotation by means of an internal clutch, the 2.5 - 5.0 NCM I belive means the range of (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: NQC for Palm
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(...) Of course on my Agenda Palmtop - it took little more than typing 'make' to port it. <smug grin> (...) So the Palm is big-endian? I didn't know that. Won't that also cause problems for NQC porting...does NQC run on any other big-endian (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: NQC for Palm
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(...) I just did some measurements of heap usage for NQC, and it isn't quite as bad as I feared. Compiling a trivial program without including the standard API uses about 11K. If you include the standard API, this grows to about 64K. For a modest (...) (24 years ago, 4-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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(...) What set(s) include this "conical" gear? (24 years ago, 4-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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It's not so much the "conical" gear that takes the backlash out of the setup that Bob Fay provided links to, but the ability to use the technic axles as torsion springs and keep the gear teeth in the train loaded at all times. That particular gear (...) (24 years ago, 4-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Re: NQC for Palm
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Well, I just got some bad news from Dave 'NQC' Baum. Apparently he's a Palm developer, and he won't touch the project, because of architectural limitations in the Palm OS. Apparently NQC needs a lot more dynamically- allocated memory than the (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | Re: Lubricating technic turntables
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(...) Why would one "never know"? This is chemistry, not astrology. Graphene sheets (the molecular unit of graphite) are quite stable and inert. Most hydrocarbon oils should also be fine for turntables and other parts with all-ABS construction (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | Re: List software?
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I think that people think it is a pain in the a$$, as there has been a post on this before, but it has been this way for a long time, and people are used to having to delete senders. I am not saying that I like to do this (I don't), but that people (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | Re: Lubricating technic turntables
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Oil may work well on turntables, but don't use them for pneumatics. I oiled them with some kind of oil (I can't remember), and now they stick and stutter when you pull them. They seem to operate fine now, but not if they get much worse. I would not (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | Re: Lubricating technic turntables
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(...) Why not? Graphite's carbon rings are most definitely not going to harm ABS plastic. Is it a purism thing? (24 years ago, 3-Apr-01, to lugnet.robotics)
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