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efferman

Eurobricks Grand Dukes
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Everything posted by efferman

  1. efferman
    thank you very much. one orf the pictures in this presentation helps a lot and my rotor should work. i only hope the walls ar not to thin. the rotor has 116 teeths and the stator will have 120 teeth so we should have a reduction of 34 to 1 if my math is correct
  2. efferman
    Doc JB, the principle behind the harmonic drive is very simple to understand. but calculating the unflexed inner gear ring is the problem. how have to look the teeth, how large has the diameter to be? the Master akiyuki has done one, but we want a transmission which is much smaller and has a large reduction
  3. efferman
    is there an practical use in lego or is it only a wet dream of math nerds?
  4. efferman
    indeed, iam working currently on a cycloidal drive
  5. efferman
    sorry guys, but the harmonic drive is a level to high for me. calculating the teeths and the diameter of the rotor needs a natural math prof and iam not one.
  6. efferman
    a 16 teeth gear with a crosshole which is rotated by a half teeth OzShan shapeways has a minimum wall thickness of 0,8mm. iam not sure if this is thin enough to be flexible enough in this size. i can make a mode,l but this is on the buyers risk.
  7. efferman
    Owen, very simple and fully compatible. a genious idea jeroen, i will look what is possible
  8. efferman
    i think he want use it on grapples and similar things to syncronize them, without four bevel gears or let them work asymetric. two gears with 17 teeths can do it but because more narrow theeths and distances between them, it is not really compatible with standard gears maybe on some uneven distances on bigger opponents. uploading the 17Z?
  9. efferman
    there is many slack between 28 and 20 teeth. not sure if this works smooth 2820 von efferman auf Flickr cumulonimbus, without any gear reduction?
  10. efferman
    There is an 18 tooth in the lego portfolio?
  11. efferman
    voila 28Z double bevel
  12. efferman
    a working disk break?
  13. efferman
    hm, the third link is a simple multistage planetary gear like my picture above. the first link shows clearly how it works. thanks for this edit i have modified the gear box and the planet cage output input opinions?
  14. efferman
    @ phy builder, ich bin gerade süchtig danach zahnräder zu entwickeln. different coulours are possible on shapeways @ cumolonimbus the maltese cross should not to be a problem. but the harmonic drive does it use a chain or a belt? two planetary gearboxes for frame mount coupled together, each one has a 4 to one reduction so this picture shows a 16 to one reduction. one gearbox is two studs long. do you think it would be better to make it one stud longer and have a crosshole, instead the 2 stud long axle, which is actually a weakpoint?
  15. efferman
    because myself is actually in sickness to make some gears, which one would you like to have or, for purists, only to see? planetary gears, torsen diffs or worms which can fit on 12 and 20 tooth gears? anything else interesting in your mind?
  16. efferman
    Splat, thank you very much, this will help a lot.
  17. efferman
    the 9 teeth was an accident . someone wanted a 10 tooth gear and i made an error in calculating the circumference and 10 teeths were to tight together and 9 fit perfect. so i made its counterpart too. only for the clutch version it was to small.
  18. efferman
    only one connector for hoses? no problem
  19. efferman
    this gear is exactly 3,7mm thick and the original gears which can be driven by a chain are 3,7mm too. at the most holes the gear is 4mm thick and at the center crossaxlehole is 7,8mm thick
  20. efferman
    10z clutch gear 10Z gear 22Z 22Z Clutch is there a need for 16 tooth clutch gears which are 4 studs thick to make a shorter gearbox??
  21. efferman
    i have changed it into 12 holes in the outer circle
  22. efferman
    the lego airtank hast two out/inlets too two new gears with a combined number ot teeths of 32 23Z and 9Z clutch versions will follow if possible
  23. efferman
    The 60 tooth gear
  24. efferman
    FTL this above is only an airtank this is a fuel tank doc JB iam not a mathematic genius. i take a sheet of paper, draw a distance and a gear with lego compatible teeth in a wanted number. then i draw ithe counterpart in a try and error method till the teeth fit together. but if you think a 18/13 combination doesnt work proper i will take a look again. edit: doc JB, you was right, 14 teeths are working better 14Z gear 14Z clutch
  25. efferman
    tomorrow, for completly new gears i have to use some mathematics. the teeths have to fit to original gears. edit: an 18 tooth gear and its counterpart on a 3L beam: a 13 tooth gear edit² 13z clutch 18z clutch
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