You can construct a circle between a cone (circle, cylinder, sphere) and a plane. It can also be created between two concentric cones or a concentric cone/cylinder combination.
PC-DMIS creates a circle at the intersection of the circular feature and the plane or between the cone/cone or cone/cylinder combinations.
In the case of a circular feature and a plane intersection, PC-DMIS always makes a true circle (not an ellipse) even if the circular feature is not exactly perpendicular to the plane. The center point of the new circle is at the pierce point of the circular feature's centerline and the plane. The vector of the circle is the vector of the piercing circular feature.
In the case of a cone/cone or cone/cylinder combination, a true circle is created even if the intersecting features do not form a true circle.
To construct an intersect circle:
Access the Construct Circle dialog box (Insert | Feature | Constructed | Circle).
From the Method list, select the Intersect option.
Select the first feature. It must be either a Circle, Cone, Cylinder, or Sphere.
Select the second feature. It must be a Plane.
Click the Create button.
The Edit window command line for this option would
read:
CONSTR/CIRCLE,INTOF,feat_1,feat_2
A - Circle Constructed from
the intersection of a cone and a plane.
B - Cone feature
C - Plane feature
Constructing a Circle from a Cone and a Plane