Creating a cycloid

[TReischl]

Ummm, a no on that one two Michael, sorry...

Well, It’s good I’m not on the team that calculates the trajectory for Mars landings and such. I might miss!

Well, obviously I am not going to make the team either. . . . . "two" instead of "too" ???? What the heck is with that!!!!

[mtylerfl]

They are fascinating and worth digging into if you find physics and nerdy stuff interesting...

Check out Brachistochrone curve, Tautochrone curve, isochronous curve, and pendulum motion.

And here are two videos: ...

Very cool!!

[TReischl]

Curious, Canis? What CAD are you using?

This interested me enough that I went ahead and set it up in GrassHopper.

And yup, that was the video I was writing about. Hard to believe, but there it is. I really enjoy seeing practical applications of physics.

[CanisLupus]

Curious, Canis? What CAD are you using?

This interested me enough that I went ahead and set it up in GrassHopper.

And yup, that was the video I was writing about. Hard to believe, but there it is. I really enjoy seeing practical applications of physics.

I'm currently using BricsCAD v20 Platinum despite being an AutoCAD guy since the '90s. What's your CAD package?

Here's a video about Generative design with Grasshopper in BricsCAD BIM. Unfortunately, at this time, the grasshopper plug-in requires the BricsCAD BIM license level and a Grasshopper WIP build. I thought it was cool but I can't justify the license upgrade when I have zero interest or need for BIM functionality.

[jimandi5000]

Does anyone have a method for drawing a cycloid in VCarve Pro? I need to create the red line shown in the image below.



FYI, from its Wikipedia entry, "... a cycloid is the curve traced by a point on a circle as it rolls along a straight line without slipping."

Thanks!
Scott

What is the diameter of the circle?

Here you go...

[mtylerfl]

Hi Jim,

Thank you!

Unfortunately, I did get an error message "attempt to call a nil value" when I tried to run it.

[Tex_Lawrence]

Apparently, gadgets aren't available for Vcarve Desktop.

[jimandi5000]

Found the error.

[SteveNelson46]

The gadget installed okay for me. I just don't know how to use it. What are the parameters? Or did I completely miss the bus here?

[CanisLupus]

Here you go...

Thanks for the gadget!

[jimandi5000]

[jimandi5000]

The gadget installed okay for me. I just don't know how to use it. What are the parameters? Or did I completely miss the bus here?

I was thinking this was a one time need so I did not build a user interface for the gadget (I can if needed). The gadget draws the cycloid shape at the 0,0 alone the X axis. And can be moved and scaled as needed. If you need to adjust the size, in the code, you will find two settings at line 45 and 46

Code: Select all

  -- Get Data --
  Cycloid.Radius = 6.0
  Cycloid.Segments = 360.0

You can make adjustments here as needed.
Let me know if I need to add a User Interface.