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Cycloidal Gear Generator

Hi Onshapers!

I just finished writing a cycloidal "gear" drive generator. It creates a cycloidal drive train using mathematically correct cycloid curves. I tried to make the UI intuitive. I hope all of the parameters that you would want to adjust are adjustable, but feedback on that would be amazing. 

Try it out!

https://cad.onshape.com/documents/347e6a9ae9d0992f4b101a70/w/d85d62ab1c292cc0d3314104/e/39a63585c0c29cabbfacb536

Again, any feedback would be appreciated!

Maximilian Schommer


Comments

  • philip_thomasphilip_thomas Member, Moderator, Onshape Employees, Developers Posts: 1,373
    OOOOOOO!!!!! 
    Where's our flattener? :)
    Philip Thomas - Onshape
  • konstantin_shiriazdanovkonstantin_shiriazdanov Member Posts: 931 ✭✭✭✭✭
    hi, rather handy FS for quick experiments! i'd like to see a sketch with pitch circles for outer and inner gears, and possibly i would propose to change the name of "tooth number" field to "ratio", and can't seems to find a field to set the diameter of inner pin array.
  • maximilian_schommermaximilian_schommer Member Posts: 25 EDU
    Thanks @konstantin_shiriazdanov
    You're right, I forgot to add the pin diameter circle to the feature list! Right now it's just half way between the outer bearing diameter and the outer pin diameter, but I'll make it editable! Also, what do you mean by pitch circle for outer and inner gears? Isn't that only useful for meshing gears? 

    Thanks for the feedback!

    Maximliian Schommer
  • konstantin_shiriazdanovkonstantin_shiriazdanov Member Posts: 931 ✭✭✭✭✭
    hi, maximillian!
    cycloidal gears are still the kind of gears that relies on kinematics of rolling pitch circles, so i think they bring rather important visual information. at least that may be an option. thank you
  • maximilian_schommermaximilian_schommer Member Posts: 25 EDU
    @konstantin_shiriazdanov

    I added the ability to change the radius of the inner pins, and also added pitch circles. The pitch circles are different than what you'd expect for gears since they're dependent on the eccentricity and the number of pins (I think), but the ratios of diameters should be correct. I might have gotten the pitch circles wrong, so don't take my word for it. 

    Thanks again!

    Maximilian Schommer
  • konstantin_shiriazdanovkonstantin_shiriazdanov Member Posts: 931 ✭✭✭✭✭
    Thanks, if i remember correctly radius of outer pitch circle for cyclo gear = (u+1)*e, for inner pitch circle = u*e. u is ratio and is equal to number of tooth, e is eccentricity
  • maximilian_schommermaximilian_schommer Member Posts: 25 EDU
    @konstantin_shiriazdanov

    Awesome! I did (u)*e and (u*e-e), but fixed it now.  I'm working on some more improvements to it and will push a new release soon!

    Thanks!
  • BLJ_ENGINEERINGBLJ_ENGINEERING Member Posts: 12 PRO
    Thanks! This is a great FS! We machined a working prototype in plastic: 
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