How to draw Cycloidal Gears in Inventor using Parameters and Equations

[@shashankshekhar6549]

equations and parameters are really helpful :)

[@bibimbap222]

nice video! it will very help for who first time to attempt make cycloidal drive

[@pecilijevelicanstveni4973]

Thank You!!! Very clear and useful explanation.

[@dhruvbose8294]

Aaaaah finally! Now I don't need to keep tracing the damn thing. You sir deserve a cookie.

[@PaulGouldRobotics]

Sorry it took so long. It was one of the easiest videos to make.

[@dhruvbose8294]

@@PaulGouldRobotics thank you. I started designing them for a mobile robot I'm planning to build around 3 days ago so this makes things a lot easier now.

[@noahsantoni7621]

Looks great! Where did you find those equations used to generate the shape? I’d love to read about them and understand more before I attempt to do the same in Solidworks.

[@hershel4609]

I think he got them from here: blogs.solidworks.com/teacher/wp-content/uploads/sites/3/Building-a-Cycloidal-Drive-with-SOLIDWORKS.pdf

[@bibimbap222]

equation what I used is different with his video but, www.tec-science.com/mechanical-power-transmission/planetary-gear/construction-of-the-cycloidal-disc/ this link might help you to determine parameters and en.wikipedia.org/wiki/Epitrochoid this document offers equation of cycloidal shape. my design is made with offset from epitrochoid

[@noahsantoni7621]

@@hershel4609 Thanks!

[@noahsantoni7621]

@@bibimbap222 I'll take a look thanks.

[@proto_hexagon5649]

i have problem import XML. anyone know why? say somthing about XML library.

[@atacorumluoglu3327]

When I use the exact values and equation, I get an epicycloid rather than an epitrochoid. How??

[@DerSolinski]

Hey Paul found a interesting take on a strain wave gearbox. Take a look: kzbin.info/www/bejne/e57ZoGaYgblgkJY Not suited for your use, but fun never the less so I though I drop you a comment 👍

[@이재황-r9w]

You're a god

[@AaedMusa]

Hey Paul I had a question about cycloidal gear drive backdrivability. In your experience are there certain parameters that make the cycloidal gear drive more or less backdrivable?

[@PaulGouldRobotics]

Yes. Make the pressure angle as big as possible. Make the radial distance between the peaks and valleys as big as possible.

[@AaedMusa]

@@PaulGouldRobotics That makes sense thanks. Great video as well. Looking forward to future projects.

[@GregorShapiro]

The equations don't seem quite to work for me in Google Sheets (though I did convert the angles to radians...) accumulated rounding off error???

[@PaulGouldRobotics]

I just put in excel and it works fine. You will need alot of points to make it smooth Please link to your Google sheet and I'll see what's wrong.

[@GregorShapiro]

"Distance to Outer Rollers" From where? Is that the radius of the circle on which the cycloidal generating circle rolls?

[@PaulGouldRobotics]

Check the Hackaday page link. It shows the diameter in (60)

[@dashs2597]

Ur a god man. Wizardry lmao

[@Skythedragon]

Nice thanks! What would the rough ratios/relations between the parameters be for the best result? Also if I make a housing around the pins (like with your actuators,) should that take up roughly half of the pin's diameter - a bit of margin?

[@PaulGouldRobotics]

Ask me this on Instagram or hackaday and we can work out some values.

[@Skythedragon]

@@PaulGouldRobotics Why not on yt?

[@PaulGouldRobotics]

I can add photos on chats and makes the explanations much easier.

[@Skythedragon]

@@PaulGouldRobotics Ah makes sense

[@LanceThumping]

I wish Fusion 360 could do equation curves like that.

[@PaulGouldRobotics]

There are plugins and api's for fusion 360.

[@dooby1445]

You can! Find the "Equation Driven Curve" plugin in the Autodesk App Store. The same equations work, just set z(t) to zero in the "Cartesian" coordinate system. The "Ending t value" of 6.28 has been getting my splines close enough to close, then use a straight line to connect the open ends. Designating the variable names in the parameters works too.

[@proto_hexagon5649]

kzbin.info/www/bejne/pGbJpIFji7R4fMU

[@JT-ei7jf]

And now the same in FreeCad please

[@PaulGouldRobotics]

Check out kzbin.info/www/bejne/fYWweXWeZ6Zgn8k

[@ericvauwee4923]

This is exactly the way I do it too :)

[@PaulGouldRobotics]

Are you using the same equation?

[@ericvauwee4923]

@@PaulGouldRobotics I do, just in a slightly different form: x(phi) = r*cos(phi)-q*cos(phi+thetha)-e*cos(N*phi) y(phi) = -r*sin(phi)+q*sin(phi+thetha)+e*sin(N*phi) theta = atan(sin[(1-N)*phi]/(SKF-cos[(1-N)*phi])) SKF = (r/e*N) //I call this "Shin and Kwon Factor" 0°