 | | Re: I wish Lego made an "Anti-Backlash Gear"
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Interesting point about the rubber bands vs the resultant torque loss, it is true that the opposing forces on the gears along with the "rubber pull" will tender them to one direction or another in concert... However,...and I say this kindly and (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | Re: Lubricating technic turntables
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yeah, probably work real good,,,,,interesting , But I would'nt use it my self. (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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>>>>>> However,...and I say this kindly and jokingly, ....Cheater!!! You experimented (cheated) with washers of a sort, gaaa.. <<<<<< Hey! real engineering uses shims (not washers ;) And I can honestly put my hand on my heart and say everything in (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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Whoa, I gotta think about this one for awhile..... (...) (24 years ago, 3-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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(...) one would do with this. The Lego Mindstorms booklet doesn't explain it at all. (My host laptop computer runs Linux, and so if it is explained in the nifty multimedia CD-ROM that came with Mindstorms, I've missed it.) It took me weeks to (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | Re: I wish Lego made an "Anti-Backlash Gear"
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Ha Ha that's great...ok buddy, thanks... Eric, - I still have got to ponder these pix for awhile! (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | Re: List software?
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(...) I didn't mean to start such a firestorm about this. I suspect, reality being lazy, that it's easier to fix a 'problem' like this in one place (the centralized mailing-list software) and not in a great multitude of places (everyone's varied (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | NQC for Palm
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I'm considering the ambitious undertaking of trying to port NQC to my Palm IIIx. I've gotten the RCXlib running, though the demo program seems to not be able to find my RCX 'alive'. I know GCC can be used to generate Palm apps, and NQC doesn't seem (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | Re: NQC for Palm
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(...) Greetings, Chris! Have you seen Mike Kory's BrickRemote? ((URL) His app relies on a physical connection with the Lego IR Tower (serial port) and (I'm probably speaking way out of turn here) also appears to be able to by-pass any need to (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | Re: NQC for Palm
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(...) I hadn't. Don't have the necessary serial connectors to do so, and it seems like it would be bulky and awkward even if successful. I'd be very happy to eliminate the IR tower from my laptop too, if there were any way to make Lego IR and IrDA (...) (24 years ago, 3-Apr-01, to lugnet.robotics)
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| | Palm Robotic Mover
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In what is the most pro-active customer support I have ever experienced, Paul Ellams contacted me and suggested I might beta a newer revision of his Robotics Mover software for the Palm platform. He was suprised that my range using a Handspring was (...) (24 years ago, 3-Apr-01, to lugnet.robotics, lugnet.robotics.palm)
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| | RE: Lubricating technic turntables
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Graphite could work, and should be safe. I've been using it for model train couplers, which are made from Delrin. It comes in a little tube, and you sort of "puff" it on. Kadee is the manufacturer, and it should be available in the model train (...) (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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| | 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: 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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(...) 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: 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: 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: 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: 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: 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: 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: 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: 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: 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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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: 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: 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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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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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: 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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"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: 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: 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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| | 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: 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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| | 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: 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 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: 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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