Re: [CAD_CAM_EDM_DRO] arc or curve fitting program

Hi Karl,

Why not a graphical approach? Plot the points in your CAD program, and
have it draw the arcs through the three points. Works for me!

Alan KM6VV


karl_l_townsend wrote:

>
> I'm taking some careful measurements on a part I'm reverse
> engineering.
>
> Given three, or more, points on a curve. How do I calculate the best
> G02/G03 parameters to cut that curve? I'm hoping for a simple windows
> app. that lets you put in points and gives the center and radius of
> the circle fitting those points the best. Also, I'll need to be able
> to calculate x,y points on that curve (you need endpoints in G02 and
> I'll not be able to measure right at the endpoint). Is the formula
> r**2 = (y - a)**2 + (x - b)**2 ?
>
> I remember covering this in calculus class 30 years ago, but the only
> reason I got through calculus was due to a very smart girl that let
> me sit right next to her, very near her paper, during quizes.
> Fortunately my eyes had great distance vision at that time <G>
>
> Karl