NX9: Using expressions/attributes to choose Sketch or Feature

[youngw]

thread561-356777
I am attempting to create several KBE (Knowledge based engineering) models for several products. Utilizing expressions to create features/suppress features I have been able to accomplish many variants of the parts I would like to create, however I just saw a Catia model that used formula based decisions to utilize one sketch or another based on logic of the expressions.
I am looking to find out if anyone is using "Expressions" or "Attributes" to make decisions on selecting one sketch over another. Additionally I would like to use the same technique to select one feature over another. An example of what I am trying to accomplish would be using one surface to trim a part or utilize a different surface in the same part to trim it in a different way for another, all driving off of formulas in my expressions or attributes.
Thank you for your help.

 

[JohnRBaker]

What you need to do is create ALL of possible alternate features (and this could include those defined using a Sketch) and assign a 'Suppress by Expression' operation to each one of them. Then using your logic, decide which feature(s) need to suppreessed and/or unsuppressed when.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
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