parametrically control state of sketch components, not just dimensions 1

[abeschneider]

Is it possible to parametrically control the state of sketch components?

For example, could I write a logical rule that would convert a line to/from reference based on some other part of the model?

Or another example, could I write a logical rule that would activate/deactivate a line based on some other occurence in the model?

This kind of functionality is definitely possible in Catia V5, using the Knowledge Advisor workbench... I haven't been able to figure out how to do this in UG, but I'd be very happy if I could! (by the way, UG NX3 & NX4 on Win XP 32bit)

 

[MSPBenson]

You could do this sort of thing with 2 sketches.
The first containing the driving dimensions.
eg if you had a box with a length and a width.
The second sketch contains the geometry you want to exist or not exist depending on the first sketch.
You can then use edit>feature>suppress by expression to suppress or unsuppress the second sketch using your logical rule. The expression created wants to be = 0 to suppress or 1 to unsuppress.
You could then use an if else statement in your expression to control the value.

Hope that helps.


Mark Benson
CAD Support Engineer

 

[Xwheelguy]

This sounds like something that Knowledge Fusion might accomplish....not sure though.

Tim Flater
Senior Designer
Enkei America, Inc.

http://www.enkei.com

 

[abeschneider]

Mark,
Thanks for your reply - I can see how the "Suppress By Expression" can be useful.

But that function won't allow the turning on/off of an individual component (say, a line) WITHIN a sketch. It only controls the suppression of the ENTIRE sketch... Is there another solution?

 

[MSPBenson]

I've not found a way of doing an individual line yet but I'm only using NX3 so far.
The 2 sketch technique will work though. You just put the line you want to turn on/off in the second sketch and turn the whole 2nd sketch on/off using suppress by expression thus leaving your geometry in the 1st sketch alone.
You can tie 2 sketches together geometrically in exactly the same way you would if the geometry was all in 1 sketch the only difference would be 2 sketch features in your feature tree.
The suppression expression can be controled by sketch 1 to supress sketch 2 (containing only the line/lines you want to be turned on/off)
hope that makes more sense.


Mark Benson
CAD Support Engineer