 | | 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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(...) 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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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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(...) 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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(...) 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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(...) 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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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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(...) Looks like toys to me. Really incredibly cool toys! Tilman's post supporting my "Toy" claim mentioned how torsionally flimsy the technic axles are. This could be used to take the backlash out of a gear train. Pull out four 48 tooth gears, two (...) (24 years ago, 6-Apr-01, to lugnet.robotics)
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(...) Yes, I've noticed this too - they like to run it through their fingers and make bracelets and whatnot from it. Perhaps it would be a good executive stress toy? :-) Jennifer Clark (24 years ago, 6-Apr-01, to lugnet.robotics, lugnet.technic)
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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: 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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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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(...) 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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| | Re: I wish Lego made an "Anti-Backlash Gear"
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Good luck!!! (...) (24 years ago, 11-Apr-01, to lugnet.robotics)
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