DrJB Posted May 2, 2014 Posted May 2, 2014 (edited) I stumbled upon these videos on youtube ... would be interesting to see these replicated in Lego. Any volunteer? The last one appears to be Akiyuki's inspiration for his zig-zag lift Edited May 2, 2014 by DrJB Quote
Captainowie Posted May 2, 2014 Posted May 2, 2014 Small wonder that timber and brass were the materials of choice for precision instruments a hundred years ago! This one from the same chap blew my mind! Quote
Philo Posted May 2, 2014 Posted May 2, 2014 (edited) Nice find... many of the ideas have already been used in GBC modules, but the wood and metal implementation is great!. I think that the use of heavy, perfectly round steel balls does help, LEGO balls too often get stuck here and there... I like the Theo Jansen leg ball pump ;) Edit - The Cardan lifting mechanism is awesome too! Edited May 2, 2014 by Philo Quote
DrJB Posted May 2, 2014 Author Posted May 2, 2014 Nice find... many of the ideas have already been used in GBC modules, but the wood and metal implementation is great!. I think that the use of heavy, perfectly round steel balls does help, LEGO balls too often get stuck here and there... I like the Theo Jansen leg ball pump ;) Edit - The Cardan lifting mechanism is awesome too! Agreed that the steel (heavy) balls make a difference. Yes, the Theo Jansen and Cardan are neat ... I wonder if the latter can be replicated with standard lego gears. Quote
Captainowie Posted May 2, 2014 Posted May 2, 2014 I wonder if the latter can be replicated with standard lego gears. If you can imagine it, you can build it! Quote
DrJB Posted May 2, 2014 Author Posted May 2, 2014 (edited) If you can imagine it, you can build it! Well ... The real question is whether one accomplish the needed gear ratios and kinematics with the gears available from lego ... I was thinking of the Antikythera when I posted that. The Lego version has way more gears than the original, most likely to mimic the necessary gear ratios. Edited May 3, 2014 by DrJB Quote
Captainowie Posted May 3, 2014 Posted May 3, 2014 The Lego version has way more gears than the original, most likely to mimic the necessary gear ratios. Exactly. That machine is a perfect example of using standard gears to get non-standard gear ratios. Sometimes the "imagine it" part requires a bit more creative thinking than usual, but there will almost certainly be a way to progress to the "build it" part. Of course, if you start imposing constraints like "it has to be able to handle enough torque" and "it has to be made with the components I currently own or can easily get" and "it has to be small enough to fit on my workbench" then it gets a bit trickier! :-) Quote
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