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Try to pattern the first feature of the group by itself and
then for each subsequent try a "reference" patten. If the
subsequent features are correctly tied to the first feature
it should work.
I frequently run into problems in Pro/E when I pattern a
group so I try that route as a last resort.
It's probably due to how the original feature is dimensioned from it's references. I also often struggle to pattern groups, and resort to the methodRyan suggests.
i try everything possible to not pattern a group for this and other reasons. while it's clean to group all of your features and then pattern them, it leads to problems. patterning single features and then having reference patterns starts to clutter your drawing tree but makes the features much more stable. Plus, you can add a new feature to the group without having to delete the pattern, ungroup the group, add the feature, group them again, repattern.
I've also had success patterning the group but remove the drafts from the group and add them later in the model. sometimes the drafts get confused about references when they rotate around a part so not including them in the group helps.
I've found certain instances where only group patterning
will achieve the desired result. I believe it's when
merges/trims are incorporated. But in general, I
completely agree with the other posters since group pattern
failure are such a pain to resolve.
Use the Surface > Copy > Transform method. It's the most robust way of patterning multi-features. Copy the surfaces to be patterned (Seed & Boundary most stable method), translate axially by '0'
Why not just do the draft after the pattern and avoid the whole issue.
Or just pattern the Draft as a Reference pattern by only drafting the surfaces created by cuts in the first instance group.
I usually prefer Reference patterns especially for features like fillets because if you suppress a fillet in a group the entire group and pattern all get wiped out. Also if you suppress the pattern you take the features with it as well there is an option to switch the instances parameter to 1 and still retain pattern dimension or you can have it delete the pattern.
I've achieved whatI've wanted, that is not my point.
The point is when I want to do pattern of a group, sometimes it goes good, sometimes not. and you almost cannot predict when Pro E is going to do a good pattern.
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