question about relations

[wtb999]

I am new to relations and trying to understand how they work. This may be a silly question -


The order in which ProE solves relations is part relations first, then feature relations. Lets say I have a part with two extrudes E1 and E2. If I create a part relation equating the depth of E2 to E1, and I create a feature relation for depth of E1 based on another feature dimension (d1).


Now lets say, I vary d1 from 10 to 15. Shouldnt the order be as follows -
1) apply part relation first to equate the depth of E2 to current depth of E1, which is 10.
2) apply feature relation to update depth of E1 to 15.


But E2 also updates to 15 upon regeneration. Why is that? I know, that is what I would ideally want. But I just want to find out what I am missing in terms of workflow.

 

[design-engine]

I'm not sure if it makes that much of a difference which one comes first or not. I know in Solidworks if your first relation moves a specific distance the part may fail as the second relation works into the model but regeneration twice usually resolves the failure.

 

[jarmoboy]

thats not clear what you want, can you specify it with some equations?
What you want is possible, equations are always better to use only in parameters. PRO/E is solving equationas in cascades from first to last one...and so one..more specific please

 

[srieger]

From what you are stating, If you modify D1 to 15 which devines the depth of E1 which which in turn defines E2, then E2 will be 15.


The order isn't as relevent but sometimes it may require 2 regenerations. In this case you will usually get an error message saying that some relations are not up to date.

 

[wtb999]

The order isn't as relevent but sometimes it may
require 2 regenerations.