Sariel Posted October 16, 2015 Posted October 16, 2015 I made some fixes, changes and upgrades to my Gear Ratio Calculator, full changelog is included below. Changes: - all icons and images of gears and motors have been changed (you’ll need to clear your browser’s cache to see the change) - drop-down lists of gears and motors are now wider to accommodate more items - added 16t gear with clutch on both sides, small Technic turntable, new 2015 large Technic turntable and worm gear with stops at both ends - added PF L and PF E motors - type 2 differential now uses separate images for the 16-teeth side and for 24-teeth side If you notice any bugs, please use this thread to report them. Quote
zux Posted October 16, 2015 Posted October 16, 2015 Thanks for an update, I've been missing L-motor recently. Quote
syclone Posted October 16, 2015 Posted October 16, 2015 Which is that strange wormgear? Thanks for the update. Quote
JJ2 Posted October 16, 2015 Posted October 16, 2015 Which is that strange wormgear? Thanks for the update. #T=C"]This one Thank for the update! Quote
NXT45 Posted October 16, 2015 Posted October 16, 2015 What about the inside of the new (and old) technic turntable? Or am I missing something? Quote
Sariel Posted October 16, 2015 Author Posted October 16, 2015 The new turntable's inside is smooth. The old one has 24 teeth, just like the 24t gear. Quote
allanp Posted October 16, 2015 Posted October 16, 2015 I have an idea that might be useful. Lets say I want a gear ratio of 60:1 for example, with the final gear to be driven being the new 60 tooth turn table. right now I have to fiddle around and try a whole bunch of combinations until I get a 12:24, 12:24, 8:24, 20:60 which equals 1:60. what would be great is if I could just type in somewhere a desired ratio into to boxes. So in the left box I type the number one, and in the right box I type the number 60. This would then return the 10 simplest combinations of gear to achieve that ratio. there could also be a place to select which start and end gear I want. Is that possible? Quote
Thirdwigg Posted October 16, 2015 Posted October 16, 2015 Thanks for the update. I use this tool often, and it works great. Quote
Sariel Posted October 16, 2015 Author Posted October 16, 2015 I have an idea that might be useful. Lets say I want a gear ratio of 60:1 for example, with the final gear to be driven being the new 60 tooth turn table. right now I have to fiddle around and try a whole bunch of combinations until I get a 12:24, 12:24, 8:24, 20:60 which equals 1:60. what would be great is if I could just type in somewhere a desired ratio into to boxes. It's perfectly possible but it needs some serious calculations (we're talking checking hundreds of thousands of possible combinations), and that's why I'm not going to run this on my server which is already stretched thin. Fortunately, there is an excellent tool that does just that made by Erik Leppen a while ago, you can download it here: http://sandbox.yoyogames.com/games/9962-lego-gear-calculator Your PC will most likely panic over running an .exe file from the internet, but I can confirm it's safe. It's a great tool, but at the moment it doesn't include newest stuff like the 60t turntable. Quote
allanp Posted October 16, 2015 Posted October 16, 2015 Nice, I didn't know about that. Thank you. Quote
braker23 Posted October 16, 2015 Posted October 16, 2015 This is awesome, I really needed that L motor there. Thx a lot! Quote
Sariel Posted October 16, 2015 Author Posted October 16, 2015 Since you like the tool so much I have also added a separate calculator for planetary gears in there. I know not a lot of people use these, seeing as there are literally 3 Lego pieces you can use as the outer ring, but I thought it may be useful since the planetary ratio formula is a bit more complex than with regular gears. Quote
1974 Posted October 16, 2015 Posted October 16, 2015 Where are the Expert Builder and the Samsonite gears? Awesome resource anyway, Sariel! Cheers, Ole Quote
Captainowie Posted October 17, 2015 Posted October 17, 2015 The new turntable's inside is smooth. The old one has 24 teeth, just like the 24t gear. You've already got 4 different 24t gears there. If that argument was valid you'd only have one entry for all 24t gears. Quote
Sariel Posted October 17, 2015 Author Posted October 17, 2015 You've already got 4 different 24t gears there. If that argument was valid you'd only have one entry for all 24t gears. So it's good that I've added that planetary gear calculator. As far as I know, driving a turntable from the inside works the same as planetary gearing. Quote
Jeroen Ottens Posted October 17, 2015 Posted October 17, 2015 Thanks for keeping this calculator up to date. One feature for the gear coupler app I longed for for some time is to have also the possibility to choose a position for a second gear in a 1/2 stud grid. Is that possible? Quote
Sariel Posted October 17, 2015 Author Posted October 17, 2015 Possible - yes, easy - no. I would have to think how to go about it. Quote
allanp Posted October 17, 2015 Posted October 17, 2015 There is a small mistake with the planetary calculator. If the yellow gear is the output then the ratio equation is just the same as two spur gears, so 16 and 48 would still equal 1:3. However, if the yellow gear is fixed and the rotating grey beam is the output, then you would add 1 to the ratio, so 16 and 48 would then be 1:4. Great tool by the way. Quote
Sariel Posted October 17, 2015 Author Posted October 17, 2015 Are you sure? I found this equation and it seems to check out, but then I may be wrong: Quote
allanp Posted October 17, 2015 Posted October 17, 2015 Pretty sure. In the picture you posted above the output is the yellow carrier, which would be equivalent to the grey beam. Quote
Sariel Posted October 17, 2015 Author Posted October 17, 2015 I see. My bad then, I'm removing that part of the calculator. Quote
allanp Posted October 17, 2015 Posted October 17, 2015 All you would need to change is the wording to make the rotating grey beam the output and the yellow gear is stationary. The equation is correct. Quote
Sariel Posted October 17, 2015 Author Posted October 17, 2015 Thanks for the advice, I did just that. If only making the grey beam the output was easy to do in practice :) Quote
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