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Mate connector not showing up in assembly?

S1monS1mon Member Posts: 2,104 PRO
in General
I have a weird problem, and I can't tell if it's a bug, or user error. I had a part with a mate connector as the third feature. It shows up just fine in the part, but in the assembly, it doesn't show. The owner part of the MC is the part that I'm inserting. I just tried moving the MC feature to the end of the tree, and now it shows up in the assembly as expected.

The part goes through some split and boolean add features along the way. Is this MC behavior because of the part IDs? Is this expected behavior?

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Best Answer

  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 5,060
    Answer ✓
    There is a determinism issue with part IDs when there are lots of splits and booleans. We are investigating how to make it more robust, but for now it is what it is.
    Senior Director, Technical Services, EMEAI

Answers

  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 5,060
    Answer ✓
    There is a determinism issue with part IDs when there are lots of splits and booleans. We are investigating how to make it more robust, but for now it is what it is.
    Senior Director, Technical Services, EMEAI
  • S1monS1mon Member Posts: 2,104 PRO
    I had this idea that if the name doesn't get lost during the split/boolean cycle, then the part ID might be fine too, but I guess I was wrong. With the splits used in my part studio, there are two parts with the same name, so I just tried swapping the order in the Boolean Add, and that didn't solve the problem I (there's more than one split, so I would really need to try multiple things to track this down). In this case, moving the MC to the end of the tree is an easy fix, but yes, it would be nice if there was more control/visibility into the part IDs.

    It's also a little counter-intuitive that the MC shows up in the part but doesn't in the assembly. It seems like the MC should have some sort of indication that it's lost its part, or as you say the part IDs need to be more robust.

    Perhaps having split create two parts with the same name is confusing for the user (i.e. me), since it's not clear which one has actually kept the internal ID from prior to the split. If I had a clear indication which one had inherited the ID, I could be more careful about downstream features.
  • Dean_GardnerDean_Gardner Member Posts: 86 PRO
    Having the same issue here.  Was this ever resolved?

  • Dean_GardnerDean_Gardner Member Posts: 86 PRO
    It seems that every time i make a split to the body I lose the MC reference to the part. Seems a shame to not resolve this.  Was beginning to like MCs for their robustness... Just seem to be making new MCs and fixing the assembly all the time.
  • Taylor_NicholsonTaylor_Nicholson Member Posts: 5 PRO
    Have encountered this issue a few times as well. Quite annoying. Just had this happen again when the split feature only results in one part (split of a single part with a plane and "Keep both sides" unchecked). More understandable when creating multiple parts (still should be fixed), but with "one part in - one part out" this just seems flawed.

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