File: Part_Document_Scripts/Measure_Radius_Surface_Keep_Con_Auto_Edge.py
Version: 1.5
Document Type: Part (also works with Part inside Product or Process)

Selects a surface face and automatically loops over all border edges. For each edge the script:

1. Extracts the edge with tangent-continuity propagation
2. Finds the edge midpoint and constructs a plane normal to the edge at that point
3. Intersects the plane with the surface to obtain a cross-section curve
4. Places three points along the curve (at 20 %, 50 % and 80 %)
5. Fits a 3-point circle and measures the radius

Results for all edges are shown in a single message box. Curve construction geometry is deleted; the measurement sets (datum points and fitted circle) are kept nested under one parent geometric set.

See also Measure Radius Surface Keep Con for the version that requires manual edge selection.

1. Open a CATPart document containing a surface to measure
2. Run the script
3. Selection: Select the surface face to measure
4. The script processes all border edges automatically
5. A message box displays results for all edges

A message box showing one result per edge:

Edge 1: R=25.43mm D=50.86mm
Edge 2: R=12.00mm D=24.00mm
Edge 3: Planar (points are collinear)
Edge 4: R=25.43mm D=50.86mm

A geometric set named MEASURE SURFACE CURVE AS CIRCLE is left in the part. It contains one sub-set per edge (Edge 1, Edge 2, ...), each holding:

• Curve_Extract_Datum — the intersection curve datum
• Point_Datum_1/2/3 — the three measurement points
• Circle_To_Measure_Datum — the fitted circle datum

• Edges are indexed automatically from the surface BRep; no manual edge selection is required
• If the three points are collinear (planar cross-section), the edge is reported as Planar and no circle is created for that edge
• Results are rounded to 2 decimal places
• To keep all curve construction geometry use Measure Radius Surface Keep Con