Fillet projects in wrong direction

[jwallace7WLCC]

Hi Everyone,

I'm new to inventor, but generally familiar with CAD, Revit, Sketchup, etc., so not necessarily new to modeling in general. In searching for solutions to this question, I've found many posts that seem to touch on it, but nothing that has provided a solution for me as of yet, so I apologize if this is a repeat question.

When filleting two faces, the fillet projects in the wrong direction, seemingly completely at random (concave vs. convex). The general consensus seems to be that the two faces are not meeting, whereby creating two different solid bodies, causing the fillet to go convex on one body as opposed to concave between both. This makes sense, except for the random nature at which it occurs. For example, one side of the item in question will perform correctly, and the other will not, and/or the command will not execute properly (for hours on end) and then just "work" on my 35th try.

I have gone back and cleaned up/checked my individual parts of the assembly, and gone as far as completely redrawing every part in AutoCAD again, and recreating each part individually in inventor, and reassembling, seemingly to a lower success rate this time around.

When you perform a fillet, a little gold arrow appears showing the direction in which the fillet will execute, is there a way to tell the software to reverse that direction? Is there an analyze command that will show me if I still have gaps in my model between two parts of an assembly? Is there a magic number of tries at which point this will just correct automatically? I have tried selecting fewer lines at a time in each group of selections, this sometimes helps. I have also tried starting my selection process at different points along the path I wish to fillet, which also sometimes seems to help, but the random nature at which this command works is driving me crazy, and seems to defy the "logic" that computers are supposed to be driven by. Any help would be greatly appreciated.

[kacper.suchomski]

Can you take screenshots of what you want and where are you having trouble?
Can you share the file without reference. The current state of the file makes it difficult to work.

Remember that with fillets, the order of operations is very, very important. Changing the rounding order affects the final result.

[jwallace7WLCC]

I guess my "rookie" is showing. I'd be happy to share without references, but I don't know how to do that. Do I need to save a different way, or export a different way to share? I'll attach screenshots of examples. Thank you for your help.

[CCarreiras]

Hi!

Hi!

It's missing info in the part. You did a simplify from an assembly and, and you didn't break the link, so, the part will have some problems when you send it to others.

I don't understand what you're trying to do as a final goal, and if you are on the correct path.

Anyway, some tips... You're speaking about inverting the fillet (Convex/Concave), you can select the option (orange square) to do that.

Also to have fillet between faces, you can use this:

Q: Are You trying to do a Revit Family? Or Revit file based on the inventor assembly?

[cssmyth64]

To clarify.... is it making the fillets convex when they should be concave or is it coming up with an error and not wanting to create the fillets at all? The later can happen a lot depending on the complexity of your geometry and is usually fixed by changing radii or seemingly trial and error sometimes, just stupid stuff with random fixes. As for concave vs convex, I have no idea.

[kacper.suchomski · Accepted solution]

It's not the algorithm's fault. The model is faulty.

[kacper.suchomski]

That rib in the video you pointed out as the problem was not connected to the rest of the model. It had a front wall. That's why Inventor rounded this rib, not the base rib.

This is a model building problem. Inventor's algorithms work fine.

[kacper.suchomski]

What else are you struggling with?

[jwallace7WLCC]

Thanks CCarreiras, I've tried both of those things (invert/face fillet), to no avail. I think as @kacper.suchomski pointed out, my problem is a relationship issue between the two solid objects. I'm trying to review his video now (it's in German) to see how I correct this.

My goal is to create fillets between each of the ribs, and the outer truss member, and then to round the square edges of each of these profiles. My problem is that I apparently do not have full connections between objects, so they will not fillet properly. My confusion is that I've built this assembly 3 times now in trying to figure this out, and sometimes objects interact just fine with each other, and fillet correctly, and sometimes they don't. Sometimes even within the same model and process (i.e. on the same model I try it, and it will fail, I try again and without changing anything, it works) So I'm having a hard time understanding what I'm doing wrong as I cant find a constant in when it does and does not work.

Thanks for the tips.

[pcrawley]

He uses "Delete Face" and selects "Heal Remaining Faces":

As the model stands, the face you can see highlighted in my screenshot should not be there - so deleteing it and "mending" the solid will allow the fillet to work correctly.

Without the missing part (the derived part) it's difficult to know what is wrong.  Whatever the case, the problem is not the fillets you have added - the problem is in the derived part.

[johnsonshiue]

Hi! I believe this is a known issue as of 2022 and later. It has been reported as INVGEN-60854 and INVGEN-61153. So far, it does not look like there is a fix yet. Hopefully, it will be fixed soon.

Many thanks!