Expression Value from Table Possibility

[Kenevil]

Hi John,

I'm creating a envelope based on SAEJ287. Both the J-Spec and my file require two inputs. Based on those inputs, one of the outputs is a "G" value. The J-Spec directs you to a particular xyz table based on the "G" value to locate approx 100 points. Without linking to an excel file somehow, I am about to do the following for each point...

Expression PT1_X = IF(G<-1.25)(850)Else If(-0.5<G<-1.24)(825)Else If ... I think there are 5 or 6 tables

Y and Z are always constant so I only have to do this for the hundred X values but it's still a lot of work. Plus, I did something similar for a "standard bolt shaft to hex head" relationship and it seems take a long time to open this file even though it's very small. Is there a better way to do this?

Scott

 

[Kenevil]

Or... what if I create every possible envelope and somehow NX puts the appropriate one in a reference set, or hides everything but the appropriate group, or moves it to a layer. That seems impossible to me but I like the challenge.

 

[JohnRBaker]

What version of NX are you running? If it's NX 8.0 or newer, I would look at the new 'List' expression type along with the 'nth' expression function. Using these functions you can do what you're looking for without having to resort to elaborate cascading 'IF' statements.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
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To an Engineer, the glass is twice as big as it needs to be.

 

[Kenevil]

Today it wax NX7.5 but I've got 8.0 also. Thanks! I'll check that out.