Bug with holes pattern

[ar.rudtp]

Got some strange behavior today.

Made few holes with 'All' extent. Patterned feature. Ooops - patterned intents are not 'all' extent but just some value.

[ar.rudtp]

Update: extension 'to object' fails in same way.

[Phil.E]

Thanks for the report and model.

Use Pattern : Faces instead of features.

[ar.rudtp]

It's easy to solve using distance with value far long as expected height of body to cut.  

But if we have 'All' and 'To object' options - natural expect they will produce same result as with extrusion of circular profile, right?

[Phil.E · Accepted solution]

Yes that is a good expectation. It's logged as a bug, thanks for letting us know.

There is another option you should be aware of:

Aside from patterning faces, you can also change the compute option.

In general, if you feel something like this is a bug, please report it. And also explore the dialog boxes for options. Whenever patterning, if the default settings give unexpected results, try other options.

[ar.rudtp]

Good point!

'Optimised' works as expected.
Is there any description of algorithm behind 'adjusted' and 'optimised'? Names are not very self-explanative for them...

[Phil.E]

Sure, things like this are explained in the help section/product documentation.

http://help.autodesk.com/view/fusion360/ENU/?guid=GUID-27ECCED2-6E46-4264-9928-64EEA05899D6

[ar.rudtp]

For 'optimised' it's just tell it's good for large quantities, but doesn't describe nothing else about it's differences from 'Adjusted'. 

[jeff_strater · Accepted solution]

here is the short version of an answer to your question.  Hopefully it addresses your request for information.

1. Face pattern and Feature/Optimized are exactly the same.  The only difference is in what is selected (Faces vs Timeline features).  In this option, the actual faces that are selected are patterned, then stitched into the destination body.  This option is the fastest, but the least robust.  Face patterns can fail more easily than others types
2. Feature/Identical pattern is the next fastest, and more robust.  In this pattern type, the selected features must form a self-contained body.  So, an extrude with a fillet is OK, but just a fillet would not be.  In this option, the body is extracted and patterned, and at the end of that process, all the patterned bodies are joined to the destination body.
3. Feature/Adjust pattern is the slowest of all.  It should really only be used in cases where it is needed.  Adjust patterns copy the internal data model of the features being patterned, and re-execute those features for each instance of the pattern.  It is useful for patterning things like to-face extrude features, where the target face is not a plane (imagine a curvy spline face or a cone).

[ar.rudtp]

Thanks for explanation, Jeff!

[josh.laycock]

Thanks Phil.

Was trying to make a parametrically driven aluminium extrusion with holes in it.  Had weird results when changing profile length and some of the user made parameters.

Changing the COMPUTE OPTION made everything work.

Very helpful, thank you.