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Bug: disappearing object during Combine

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10件のコメント

  • tab...

    Buk,

    A geometry check?

    Maybe Combine Body by Body - that's a guess...sometimes it's solves an odd issue.

    Interestingly it happens on the XY plane at global Z0

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  • tab...

    and knocks out exactly 1 ring - i'd have to get all nano forensic to sort ( if i could !).

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  • Me Here

    Sorry. Should have mentioned. All geometry is clean, and combining them individually works fine and results in clean geometry also.

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  • tab...

    Buk,

    I think it's just a minor 'selection technique mishap' but please report it.

    The Combine function works OK - i can't beat it.

    Only in the circumstance of touching faces of shelled cubes, box selected, does it not fully comply. By single selection all is OK.

    All other combinations of Shelled Cubes interfering with or without coincident faces, again is OK.

    I've never encountered such a situation where i've actually had to do this - but in case i do, the single selection seems the default 'All's Possible' solution.

    In the Gif below, with File / Document name as 'Active', all the Shell recognitions are lost - the voids remain, but the logic is destroyed.

    In the below Gif, with Component CUBES2 active, box selection auto combies OK preserving the Shell recognition.

    In the below image,  the interference / mating conditions are shown.

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  • Me Here

    Feel free to play with this: https://we.tl/t-hXv8xsCgtr and see if your selection technique is better than mine?

     

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  • tab...

    Thanks I've have downloaded - but not now. It is odd that bodies disappear !

    Too much time spent already on this - i was looking to see if there was a problem and what it might be.

    It seems that for multiple bodies that are only touching , there might be a need for individual selection to succesfully combine. Box ( blanket) selection might not provide the joining algorithm with all the necessarry information.

    On occasions i have seen SC youtube vids where operations go only 'half way' and a repeated command is necessary. I know that behind the simple is the complex and behind the complex is 'black hole territory' ( for me).

    I only get to know how to work the s/ware ( best i can).

    OTHER:

    SC/Ansys is solely responsible for the DSM F1 and F3 content help. There is no other SC content in DSM.

    RS is responsible for all other help tutorials and these are being updated.

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  • tab...

    Buk,

    It's not Combine that's at fault - i've removed all the R8 fillets and the combine works fine.

    but i can see you need the fillets and they're necessary.

    It's speculation ( and obvious), the blanket box selection when multiple fillets are requiring to be joined, is far too complex for it. Hence, the requirement for individual body to body selection - working easily.

     

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  • tab...

    Not a sugestion what to do but the problem is clearlt with the fillets - as you know the fillet is fully consumed internally with just a small bit left on the outside.

    For donkey years, fillets have been an ongoing issue in CAD and always high on the agenda for improvements, perhaps less so now.

    Anyway, by changing the flat into concave faces using the Combine Cut Keep option with neighbouring object / tube end, then BOX select Combine all works again.

     

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  • Me Here

    Tim,

    You're expending too much effort on this. I had a solution-- individual joins.

    But if they can be joined -- without modification using individual joins, then they surely ought be be joinable en masse without modification. Ie. It's a bug.

    In response to your 'fix'. The framework is built using lines and the pipe tool; it creates those fillets. If they are at fault, then it is another (different) bug.

    But, do you not think that having an entire solid disappear as a result of an operation constitutes 'a bug'?

    Further, given the 9 replications are identical,and positioned using another in-built operation -- Move-create (linear) pattern -- and it is one solid in the middle of that replicated group that vanishes -- silently, although obviously, without error message -- points to an internal problem rather than a user error?

    In the end, if someone from RS/SC decide to investigate what's going on internally, they're welcome; otherwise I'll just right it off to another fixable bug that I'll probably never encounter again, and I'll know what to look for in the unlikely event I do.

     

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  • tab...

    Yes, i am...but i believe with the fillets they need a heirarchy ( next, next next ) approach to make work...

    Any 3 bodies boxed selected can't be joined - there's an ' Cannot Merge Bodies' message.

    Anyway, i agree, time for something else...

     

     

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