In NX 12 the Modeling Preference '
Treat Degree 1 Spline as Polyline' is
ON by default. As a result the Extrude command will create a Convergent body (rather than a typical Analytic body), if the section being extruded contains a curve/edge that is a Degree 1 Spline.
Solution
In NX 12.0 and 12.0.1 the user can turn off the '
Treat Degree 1 Spline as Polyline' preference (located under '
File - Preferences - Modeling - General/Convergent'). However, there is no corresponding customer default to control this setting, therefore it will be ON at the start of every new NX session.
In NX 12.0.2 there is a customer default to set this preference, under '
File - Utilities - Customer Defaults - Modeling - General - Convergent'. The '
Treat Degree 1 Spline as Polyline' preference is
ON by default.
Notes and References
Hardware/Software Configuration
Platform: all
OS: n/a
OS Version: n/a
Product: NX
Application: DESIGN
Version: V12.0
Function: FEATURE_MODEL
Ref: 001-9275819