Hello @Dale_Rosema
Most of the time, as @Patriot_1776 said, it's enough to modify acuracy in this kind of situations. In this specific one however, i't'e not enough (even with accuracy_lower_bound 1e-5). Better than a long explanations, I registered a little movie showing that:
- Issue is reproduced as per your guidance
- A kind of "partial workaround" could be the redefinition of the Bend Back Feature and select the bends in the "good order" (instead of using the automatic way)
- Above "partial workaround" is nevertheless not enough (because issue then occurs on the successive Unbend feature, and produces a kind of note very far from model, causing "extent issue" leading in graphical issues on screen)
- Root cause is pointing to the 2 lateral Flange Wall features 4 and 5
- Using Flat Walls instead seems to setup a stable situation in this context
Consider this just as a guidance with a willingness to help you getting rid from the current issue, but for sure not as a "resolution". In my opinion, I do not see any valid reason to justify why it's not stable in original conditions (with the Flange Walls 4 & 5), so that:
- If it's an isolated use case, and what I propose here is enough to consider this as a resolution, I think we can just stop investigations here
- Otherwise, if use case is more global, or if you have any concern (even with my approach, or with the fact it just should work in original conditions), I suggest you to open a case to PTC Technical Support for probable SPR creation purpose
I attached also in this post the result (bin_ts.prt) of what I did in the movie fo your reference. Just be careful with this model, as I did the dimensionning very quickly, so that you may need to modify slightly some positionning dimensions of the holes (supposed to be the corner reliefs).
Regards,
Serge
