Using Expressions to drive Thread sizes 2

[BSM1487]

I want to set up an If_Then_Else statement in NX6.0 that drives symbolic thread callouts. The input would the the tap-drill diameter. Basically, I need to know if it is even possible to control the callouts via expressions. And if so, what would the "then" argument be?

Thanks.

 

[jerry1423]

You might have better results if you utilize "suppress feature by expression" with this.
In other words all the thread sizes that you have the potential of using would be present in the model but only one of them would be toggled "on".

 

[BSM1487]

I could use that as a last resort. Preferably I'd like to keep the part navigator as uncluttered as possible.

 

[jerry1423]

yea, you are right, it's a matter of weighing the advantages with the disadvantages

 

[JohnRBaker]

If you create the threaded-holes using the NX Hole function, then yes. You can go to the expression system and edit the string expression which calls out the thread size, such as editing the expression value from something like 'M10 x 1.5' to 'M12 x 2.5' (as long as it's a valid size in the thread table), it will update the threaded-hole feature.

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

http://www.siemens.com/plm

UG/NX Museum:

http://www.plmworld.org/p/cm/ld/fid=209

To an Engineer, the glass is twice as big as it needs to be.

 

[jerry1423]

I did not realize that it was possible to do that - very cool!
Of the four expressions listed for the thread the second one is the only one that will need to be changed.

 

[SiW979]

Have a look at the expressions in this part. Everything is driven from the expression bolt_size

Best regards

Simon NX7.5.3 - TC 8 www.jcb.com

 

[BSM1487]

John, does the call-out expression generate itself or do I have to create it? I've looked for it in the expression editor(filtered by string), but nothing shows I up. I've noticed the thread parameters dialog shows the call-out with the brown background which normally shows up when the value is tied to an expression.

 

[JohnRBaker]

This capability is ONLY available when creating Threaded-Holes using the...

Insert -> Design Feature -> Hole...

...feature function.

This is NOT relevant when using the separate...

Insert -> Design Feature -> Thread...

...approach creating a threaded hole from an existing simple hole.

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

http://www.siemens.com/plm

UG/NX Museum:

http://www.plmworld.org/p/cm/ld/fid=209

To an Engineer, the glass is twice as big as it needs to be.