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How to make cyclodial gear.

jakub_wiacek
jakub_wiacek Member Posts: 4 ✭
in Community Support

I need help to make a cycloidal rack, I found equations online for x and y that can be implemented in 3ds or fusion360 but there is no description anywhere on how to do it in Onshape. I also found that in feature script there is a parametric curve option where you can enter equations for x and y but I can't get that equation to work due to differences in how the programs work.

x = (Rcos(t))-(Rrcos(t+arctan(sin((1-N)t)/((R/(EN))-cos((1-N)t)))))-(Ecos(Nt))y = (-Rsin(t))+(Rrsin(t+arctan(sin((1-N)t)/((R/(EN))-cos((1-N)t)))))+(Esin(Nt))

N - Number of rollers

Rr - Radius of the roller

R - Radius of the rollers PCD (Pitch Circle Diamater)

E - Eccentricity - offset from input shaft to a cycloidal disk

Answers

  • shawncrocker
    shawncrocker Member Posts: 22 ✭✭

    Onshape will start suggesting terms and function as you start typing them into the equation. Have started adding it into onshape yet or are you just fishing right now?

  • jakub_wiacek
    jakub_wiacek Member Posts: 4 ✭

    I've tried playing around with different functions, but it's too difficult for me. Honestly, I didn't have sines or cosines in school yet, I'm in my first year of middle school majoring in mechatronics techniques.

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