 | | Re: I wish Lego made an "Anti-Backlash Gear"
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Listen guys, I'm not playing around with a "Building toy" here, look, (URL) working - creating on this scale, you begin to demand the highest preformance from all aspects of Lego. Eric "Legomaster" Sophie (...) (24 years ago, 6-Apr-01, to lugnet.robotics)
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| | Re: robotica on TLC
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(...) GPS wouldn't work. Even though the government disabled Selective Availability last year, commercial GPS still doesn't achieve an accuracy better than several meters. I would imagine that for GPS to be suitable in such a competition, it would (...) (24 years ago, 6-Apr-01, to lugnet.robotics)
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| | RE: robotica on TLC
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I must sadly agree with you, Steve... Though what Dean suggests would bring some real technological ingenuity to a drab genre, no fully-autonomous robotic device is going to beat a human-controlled telerobotic device for quite some time. [And I will (...) (24 years ago, 6-Apr-01, to lugnet.robotics)
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| | Re: robotica on TLC
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(...) I think that's a bit extreme...but I think it would be quite hard to televise. a *real* robotic challenge. (...) Yes. Also, you'd need ways to make the two robots mutually detectable - a big IR emitter on top of each one...but to make it a (...) (24 years ago, 6-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 the unit price, but the primary motivation for Lego products: It's a toy for kids. Yes, it has found some applications in education and amateur robotics, but it's still a toy. To build exact mechanisms, you not only have to deal with (...) (24 years ago, 6-Apr-01, to lugnet.robotics)
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| | Re: robotica on TLC
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I came here to post about Robotica, but I should've known it was done already! But I'll still discuss it:) Dean, I agree completely. This is for entertainment, and not just entertainment for robotic designers, but for the public. I actually like (...) (24 years ago, 6-Apr-01, to lugnet.robotics)
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| | Re: robotica on TLC
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I think it would be a much more painful experience to watch autonimous robots out there bashing away at each other. Both from an entertainment and philosophical level. From an entertainment standpoint, I imagine it would be painfully dull. Given the (...) (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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(...) Believe me that I have tried a lot of combinations. Also your and my idea of "little slack" may be quite different. But it is true that I have never done an exhaustive study on the subject. I usually just give up on getting it perfect and rig (...) (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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(...) If you use a tensioner arrangement, then it works OK. I haven't really played around with much more than simple weight tensioners (mostly for conveyer use...the catapilar treads are great for that!), but imagine you could come up with a (...) (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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Dean, it's probably dumb luck that the two drives on the piece I'm working on have little slack. Yet, with LEGO beams and blocks you can't use every gear combination; there are published beam/block/plate combinations that let this or that pair of (...) (24 years ago, 5-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Re: robotica on TLC
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(...) [snip] Indeed! They are not by ANY definition robots. When I saw the spots a long time ago on TLC hinting at a new robotics competition, I visited the site and signed up. I actually spent a fair amount of time jumping through strange hoops, (...) (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're kidding, right? It's almost impossible to build a geartrain using the chain that doesn't have tons of reversal delay. The links seem to be designed in such a way that they don't work well with technic beams and gears. I always have (...) (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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There is one real simple way to eliminate backlash: Use LEGO's 'small-link chain' with their normal gears as sprockets. I paid CAN$7.00 for 135 links from Pitsco-Dacta's Canadian vendor. There is absolutely NO backlash. Mind you, the gearing problem (...) (24 years ago, 5-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Re: Lubricating technic turntables
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I have a few opinions on the lubrication issue: 1. I would be wary of anything water-soluble/organic as it might grow mold etc and perhaps start to smell. Leave some out for a week or two and give it the 'nose' test before using. 2. Even though (...) (24 years ago, 5-Apr-01, to lugnet.robotics)
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| | RE: legs anyone?
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Jim, I would love to see what you have done so far. Do you have anything online? I am looking for a project for my students, but am not sure they could handle this one. Steven B. Combs, MS, CIT Associate Professor - Instructional Technologist Ivy (...) (24 years ago, 5-Apr-01, to lugnet.robotics)
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| | Re: Lubricating technic turntables
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Hey! Some lubricant's are especially made for lubricating thin latex night wear that I won't mention since this is a family news station... Let's just say the latex thingie is used to keep the number of kidos down. But I bet the clerks will wrinkle (...) (24 years ago, 5-Apr-01, to lugnet.robotics)
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| | RE: robotica on TLC
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I share you pain. These are not, by true definition, robots. When they require a robot to be autonomous then I will take notice. I know our robotics competition here at the college specifically states that the robots must be autonomous. What I (...) (24 years ago, 5-Apr-01, to lugnet.robotics)
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| | Re: Advanced Control strategies
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Hi Mauro, I think what you're looking for is legOS. You can find it here : (URL) can't imagine a more appropriate place to ask such questions then this site ! Rainer (...) (24 years ago, 5-Apr-01, to lugnet.robotics)
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| | Advanced Control strategies
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We are trying to implement advanced control strategies in RCX robots, as neural networks and fuzzy logic. But I think the NQC don't has what we need, as arrays (memory allocation) and aritmetic functions (sigmoid logist for example). Does any one (...) (24 years ago, 5-Apr-01, to lugnet.robotics)
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| | Re: robotica on TLC
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I share your frustration and agree, they are by no means robots. Are remote controlled planes, boats and cars robots? I have watched BattleBots a few times but got bored with it for similar reasons. The unfortunate thing is that your typical couch (...) (24 years ago, 5-Apr-01, to lugnet.robotics)
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