How do you do your removal of material as showing the right of the photo.
Before doing the removal of material can you do a collision detection I have the impression that you have cone trunks that are intervening if I see the artifacts on the image. That said, the removal of material should not leave any residue but it is difficult to tell you why without having the 3D model and without the vision of the tree of creation.
If I understood correctly, it is of course the first step, namely after removing the material, that you have unwanted pieces of sheet metal.
It is these weird residues that prevent you from doing the next step "convert the entity".
That's right!
I suggest that you do one revolution removal instead of one perpendicular plane. Just to see if the problem of residual bits persists in their error. As it's not the same logic of material removal, it's worth trying (not the same part of the program that does the removal)
The residue doesn't prevent me from doing the other steps, because I convert the sketch from my 3D sketch which serves as my skeleton.
I carried out a test by checking and unchecking the normal material removal, by unchecking this option the visual rendering is suitable, but the problem is that I don't unfold my cone trunk. But by checking this option I have the residue present but I can develop this cone trunk.
I asked the question to find out if I used the right tool and if it has ever happened.
I'm going to try the removal of material from assembly.
@Zozo_mp I tested with material removal with revolution, it's the same problem as when unchecking the normal material removal box. That is to say the viseul and top rendering. But the problem is that I can't develop my cone trunk.
After testing on your part, I managed to correct the problem area on the T2 2 part. I used the "DeleteFace" function with option n°2 in the settings, to delete the "buggy" song In itself, it is probably not the best solution but it allows you to troubleshoot a problem with the software