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torbjorn
in reply to: GoranBe

I don't use too much assembly sketches like this myself, but it does indeed work.  But that is just because I normally do the design in master parts and keep the assemblies as simple as possible.

 

Assembly sketches lack some functionality (and are somewhat less stable) compared to part sketches. For instance, if you project part sketch geometry to an assembly sketch it will be grounded and will not update. 

 

Model edges can be projected, and if you are in doubt you can always check the sketch constrain to see if it is associative or grounded. Normally those projected lines will stay stable until you do a something that changes the internal Inventor ID of the actual edge. If you replace the part, the projected line will fail. If you change the part so the edge disappear, the projected line will fail. If you delete the line in the part sketch and redraws it, the projected line will fail. The last example can be harder to understand than the first ones, because the geometry might looks identical to the human eye. But inside Inventor it has got a new ID, and the projected line does not find its reference.

 

The driven dimension will be a reference parameter and can be used for example to control an assembly constraint or as a value in some iproperty.

 

Torbjørn