Unusual Assembly Behaviour

[Poorpaulus]

Well, it's unusual to me....
I have an assembly which when opended looks great. However, as soon as I click on a specific part (rubber mastic), it changes. More specifically, There is an extrusion which its direction is guided by edge on one of the other parts. When I click on the mastic, it looses its guide and shows the extrude normal to the base.

If then I close the assembly without saving, then open the model of the offending part, all is not well - it is in the same post click condition.

Is there anything that I can do to sort this? it has taken me days to model.

Paul.

 

[aamoroso]

Not sure but if by saying "click on it" you are referring to the part in the assy view not in the feature tree, perhaps the part is dragging out of position and losing the relationship to the edge that guides the extrude. If thats the case you can turn off move components by dragging in your assembly options on the tool menu.

 

[TheTick]

One theory:

Could lost reference/regeneration issue. The part loads OK because it is relying on it's old "memory" of what it looked like when it was last saved. When the part regenerates, it looks for its guide edge(in context). Somehow, the reference to the guide edge has changed. Perhaps the model with the guide edge has changed somehow that the offending part does not properly recognize those edges as the same edges anymore.

Got to the feature definition of the offending feature and see if you can redefine it, and check if all of the references are intact.

This may seem cumbersome, but I usually add an extra link to the "reference chain" when designing in-context. For instance, if I need an edge from another component for a sweep, I copy the edge into my work part with a sketch and use the sketch to make the sweep. That way, it is easier to fix lost/broken references.

There are two types of people in the world: the kind that believe that people can be categorized into one of two groups and the kind that don't.

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[MElam]

Are the parts lightweight? That would cause the part to load into memory when you click on it. If the part with the edge defining the extrude dimension is still lightweight, it's edge will not be found until it is resolved also.

If this is the issue, resolve both parts. If it does not update immediately, try ctrl-Q.