"I only found out about pattern assembly recently. You have to place
component that references only pattern features. Then, when you select
the component and use the pattern feature, instead of the typical
dashboard for pattern placement, you get a greyed out pattern with
"Reference" as the type. When you accept, the pattern is placed. It is
a seemingly very powerful tool. Instead of enormous family tables to
turn each specific feature on and off, Pro/E automatically adds that
specified part whenever that type of pattern exists. This cleans up the
model tree and family table up a lot and makes it much easier to
understand."
Reference patterns are fantastic. They speed up modelling; leave a
clean model tree; and, by creating lots of reference patterns rather
than patterning one large group, make models more robust and easier to
modify.
A very good example is a bolt flange with multiple holes:
- Create first hole
- Create pattern of first hole
- Create chamfer on first hole
- Pattern -> Accept (middle button or green tick)
...
- Assemble bolt into first hole
- Pattern -> Accept
- Assemble nut onto first bolt
- Pattern -> Accept
...
It's as quick and simple as that! As Merrill says, the important thing
is to keep your references clean: only reference static features (such
as the face of the bolt flange) or features of the pattern leader (first
feature in the pattern). Avoid referencing anything that would
over-constrain the orientation of each pattern member, such as a
vertical plane for a circular pattern of holes.
HTH,
Jonathan
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