Can anyone help me? I think I know that I can't measure a radius when I have used a conic sketch. I really need to know if there is maybe a equation to figure out the radius of the conic sketch created?
Can anyone help me? I think I know that I can't measure a radius when I have used a conic sketch. I really need to know if there is maybe a equation to figure out the radius of the conic sketch created?
Hi Jennifer
I think it's possible to sub divide any conic into two smaller conics
like this
repeating again
Once you have enough its easy enough to approximate with 3 pt arcs
Solidworks isn't bad at keeping up with changes, but its best to not do BIG jumps, or the sketch solver gets lost
and you have to suppress or delete a relation or two so it solves again
2016 attached
Hi Jennifer, Completely unrelated I just stumbled upon this in the API and thought it might help you.
2016 SOLIDWORKS API Help - Find Minimum Radius of Curve (VBA)
Looking at the code it requires a model edge, so to test it I just made a planar surface with a conic edge.
I then used the output to draw a circle. Note the coordinates returned are the point on the curve, not the center of the circle so I tested it like this....
looks good to me
The conic sketch tool in SW uses a different form than typically found in optics which is what I have used with the Formula Driven Sketch Tool. I use the formula driven sketch with this form:
y = (x2/R) / (1 +√[1 - (1+K) ∙ (x/R)2]),
Where: The axis lies along the y-axis and represents the height as a function of x.
The vertex is at y = 0.
K = Conic constant Rho
R = Radius of curvature.
You should be able to match your existing curve starting with a Conic constant K = -1 for a parabolic.
A conic sketch is multiple radius - like a French Curve....