Hi OSTexo, well a helix is a pretty linear progressing thing, generally I think linear reasoning should work with it.

The way I'd do it, is that you want to measure the angle that your red point has traveled along the helix, so you want to use the longer angle of 288.0962488 degrees, not just the smallest angle between them.

So at this angular travel station of 288.0962488 degrees, your point has traveled a distance in Z of 2.4351833 . To get the pitch you want the distance that will be traveled at a full 360 degrees, so the conversion factor is 360.0 / 288.0962488 - multiple the current distance of 2.4351833 by that conversion factor to get the pitch:


360 / 288.0962488 * 2.4351833 = 3.042962


Does that work to get you the proper pitch?

- Michael

Hello Michael,

Right on the money, thank you very much for your help, I don't think I would have figured that out despite passing the first grade.

You're welcome!

And you're probably all set now because you already know the height and top/bottom radius of your cone.

It should also be possible to calculate the bottom radius just given those 2 points as well, to do that you'd measure the radius at each of those points and get the change in radius, then multiply that by the same angular scale factor (360 / 288.0962488) and that should give you the change in radius for a full turn, so multiply that by how many turns you want and add that to the top radius to get the bottom radius.

- Michael