Hello,

Why won't the RST hole fill? I try deleting the edges, adding a plane and union, nothing works. Ideas? Thanks.

If you slect the entire surface, then run seperate, then select that top surface and drill down to the edges and delete them, it will recover the trimmed surface. Notice that the original cutter is underneath.

I dont think the untrim function works on joined surfaces.

Hi Burr, actually untrim is supposed to work on things that are joined, just so long as none of the edges you are trying to delete are joined to other things.

I think there is a teeny-tiny additional surface going downwards and joined to those edges, that seems to be why they don't delete unless you separate it.

- Michael

Hi OSTexo, the problem is that the edges in the RST hole are not actually free unattached edges, there is a micro thin surface joined to them.

So for instance if you select this face:



And then delete it, you will see this little left-over piece:



That looks like a curve, but if you select it you'll see that they are actually surfaces. Since those are joined edges that's why they can't be untrimmed.

To fix it, drill in to select just the big face, use Edit/Separate to break it out from the others, then use Edit/Hide to hide it, now you can select and delete the little fragment piece, then show the big piece again, select everything and join it back together, and now you can untrim it like you want.

- Michael

Hello,

Thanks for the help, I thought I was losing my mind there for a second. Is it just experience that tells you there is something off with the model or is there a way to deduce the problem more quickly? I got into insanity territory on that one, trying the same procedures over and over again. It is one of the last components I need to use in the guide, maybe I'm becoming just proficient enough to be dangerous to the model (chuckle).

Hi OSTexo, well at first I thought there might be a micro sized edge in there that was not getting selected by just clicking on things.

But doing a window select around the hole would only come up with 2 edges being selected, so I ruled that out.

Then just one of the ways I tend to inspect a problem model more closely is to delete chunks of it and see if there are any weird little bits left over or things like faces doubled up over top of themselves or stuff like that.

- Michael