 | | Re: Synchro drive in Lego —Mark Tarrabain
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| | | (...) Hrm... how would you manage that? I cannot think of any purely mechanical approach that could do the trick. (...) (26 years ago, 14-Jan-99, to lugnet.robotics)
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| | | | | Re: Synchro drive in Lego —Paul Speed
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| | | | | (...) Well, apparently, neither can I. :) Or I would have done it and posted it. :) I played with some stuff last night that ended in a dead-end. I'm not really sure the approach is fruitless, but I'm realizing as I go on that I'm much less creative (...) (26 years ago, 14-Jan-99, to lugnet.robotics)
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| | | | | | | Re: Synchro drive in Lego —S. Crawshaw
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| | | | | | (...) could you not (I haven't tried this!) use a ratchet on the assembly so that axle rotation one way turns the assembly, and the other way drives the wheel? Stuart -- Did you check the web site first?: (URL) (26 years ago, 14-Jan-99, to lugnet.robotics)
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| | | | | | | | Re: Synchro drive in Lego —Paul Speed
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| | | | | | | (...) Yeah, but I can't think of a good way to ratchet the assembly. -Paul (pspeed@augustschell.com) (...) (26 years ago, 14-Jan-99, to lugnet.robotics)
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| | | | | | | | | Unidirectional gearing - was Synchro drive in Lego —Medical Informatics Consulting
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| | | | | | | | | Here's a really simple (but not fool-proof way): Feed the motor output into a differential gear. The output from the differentials run out through beams and have a medium gear just outside the beam. Then suspend another beam from one end using a (...) (26 years ago, 14-Jan-99, to lugnet.robotics)
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| | | | | | | | | Re: Synchro drive in Lego —S. Crawshaw
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| | | | | | | | Assuming I have got the design spec right (ie, a wheel which can turn 360+ degrees and drive independently), I have managed to build one from just the Mindstorms bits. But it needs two motors at the moment, since I haven't got a differential left to (...) (26 years ago, 16-Jan-99, to lugnet.robotics)
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| | | | | | | | Unidirectional drive (was Re: Synchro drive in Lego) —Mark Tarrabain
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| | | | | | (...) Yup, that'd work. But it would have the annoying side-effect of making a heck of a lot of noise as the ratchet went from tooth to tooth. Is there any way to minimize that? (...) (26 years ago, 14-Jan-99, to lugnet.robotics)
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| | | | | | | | Re: Unidirectional drive (was Re: Synchro drive in Lego) —Paul Speed
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| | | | | | (...) It would only do it when turning the assembly, not driving the robot. So it might be acceptable. I don't think I have the parts to try this unfortunately. -Paul (pspeed@augustschell.com -- Did you check the web site first?: (URL) (26 years ago, 14-Jan-99, to lugnet.robotics)
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| | | | | Re: Synchro drive in Lego —Zachary Bourk
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| | | | use 2 ratchet gears: one slips when you are driving the wheels, the other slips when you are driving the platform, but both ratchets never slip simultaneously (unless the bot is broken) (...) ---...--- Zachary Bourk UCSD, EE (...) (26 years ago, 15-Jan-99, to lugnet.robotics)
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