how make Class A surface analysis in catia?


You have check the connection between the faces. Class A means
G0 Point
G1 Tangent
G2 Curvature
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Step 1:
Check the connection between the three faces.
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Step 2:
open "connect checker analysis"
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Step 3:
G0 is OK between green and blue
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Step 4:
Tangency (G1) is OK
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Step 5:
Curvature (G2) is OK
so--> CLASS A -
Step 6:
G0 is OK between blue and yellow
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Step 7:
G1 is OK
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Step 8:
G2 is NOT OK, 98,72% difference
so--> NO class A