surface reconstruction from stl

[theluka90]

hi to everyone, I write for the first time on the forum with hope that someone can kindly help me.
use cat v5 and have a stl file and from this should get a clean surface from which to get a solid closed.
now my questions are:
- can you convert the stl file to shooter surfaces?
I managed with another program to get an igs, so the same piece consists of many small triangular surfaces, with this file I can make sections to rebuild the piece; or better I can to some point.
I attach the stl file and the caty part to the point where I arrived.
If anyone could suggest how to do the last part, I'd be very grateful.
There is also a command that selecting a tot of vertical and horizontal sections reconstructs a surface: like the patch command of rhino.
thanks in advance

 

[gianni55]

Hi.

with catia it is possible to convert the stl file, but you have to have a module that I think is called typize shape editor and with the import command select the stl file and it amounts; then with the quick surface reconstruction module and with the automatic surface command generates all the surface, but you have to be careful, as automatisms do not do miracles, if the relief or the sl are ugly, the result will be similar.

first of all you have to understand what it is and then operate accordingly (the relief is aimed at creating a model of body shop? is a pipe?) according to that, the procedure is established.
in your case you have made a union from the iges, and then made of the spline sections, anchoring intersection points, in this way your model will be very close to the relief, but hardly manageable for smoothing and deleting of the flexes.
very difficult to answer without knowing what it is and what the model serves... try to create a plan on which to create the two basic curves with no constraints (but close to the relief) insert the bending analysis and try to optimize them, then switch to the sections and do the same thing.

ps your surface does not lie on the 1.stl and does not seem mirrored. . .

Hi.

 

[theluka90]

First of all, thank you for your answer. It is a 3d scan of an arm. the goal is to get a surface similar to the stl file also not equal so that you can work on it with offsets, cuts etc. I have to get a solid thickness that will represent a guardian.

 

[theluka90]

ah I add that it is a help that I am giving to my girlfriend for the graduation thesis

 

[heterodyne]

Good evening,
see if you can get the refit done this way
View attachment refit.zip


ciao

 

[theluka90]

Bye. thank you is a good result. very similar to mine if you did it with the method of gianni55 getting a surface from stl. If you've done all the construction, could you tie me up the caty part? Thank you.

 

[heterodyne]

Bye. thank you is a good result. very similar to mine if you did it with the method of gianni55 getting a surface from stl. If you've done all the construction, could you tie me up the caty part? Thank you.

I did the reconstruction but I didn't use casket. I can only leave the .step file

 

[theluka90]

Okay, thank you anyway.

 

[mariuss.r]

hi to everyone, I write for the first time on the forum with hope that someone can kindly help me.
use cat v5 and have a stl file and from this should get a clean surface from which to get a solid closed.
now my questions are:
- can you convert the stl file to shooter surfaces?
I managed with another program to get an igs, so the same piece consists of many small triangular surfaces, with this file I can make sections to rebuild the piece; or better I can to some point.
I attach the stl file and the caty part to the point where I arrived.
If anyone could suggest how to do the last part, I'd be very grateful.
There is also a command that selecting a tot of vertical and horizontal sections reconstructs a surface: like the patch command of rhino.
thanks in advance

I apologize for the intrusion in the caia forum. .

I wonder why you didn't do everything in rhino. you could get the solid you needed with 4 commands.

1 ) _dupborder (to extract stl edges)
2) _mesh2points (to extract stl summits as a cloud of points)
3) _patch 25 u spans 13 v spans stiffnes 0.1 (to create a single patch surface by selecting the edge curve and cloud of points with tolerance +- 0.1 mm)
4) _offsetsrf with solid=yes option(to make the surface offset and get the solid )

the result of these commands you see it in the attachment (set of 2mm towards the outer arm)

I have exported in iges format that certainly catia law (bad format for solids)

 

[theluka90]

Thanks for the answer. to answer your question is because I never used rhino and I don't know what the potential of the program is.
the project is developing it with rhino my girlfriend who found it difficult to get the surface, I since use catia I have proposed to find a solution to get that surface (also as exercise). isn't that you could pass the rhino file so I'll take a look at it to see if it can be useful? Thank you.

 

[mariuss.r]

Thanks for the answer. to answer your question is because I never used rhino and I don't know what the potential of the program is.
the project is developing it with rhino my girlfriend who found it difficult to get the surface, I since use catia I have proposed to find a solution to get that surface (also as exercise). isn't that you could pass the rhino file so I'll take a look at it to see if it can be useful? Thank you.

ok ...in attachment the file in rhino .
be careful not to spoil her too much or in the future you will find yourself having to do all the home affairs

 

[theluka90]

Thank you. I'll pass it tomorrow. not having rhino on the pc I can not see your work.
I saw that the first file you attached was already a rhino file and not igs.
for the moment thank you again.

 

[mariuss.r]

Thank you. I'll pass it tomorrow. not having rhino on the pc I can not see your work.
I saw that the first file you attached was already a rhino file and not igs.
for the moment thank you again.

You're right. I've got the rhino file instead of the iges. I better go to bed.

 

[gianni55]

hi theluka90, you saw how nice discussion came out of it... :biggrin: Now if you try to import all the files that the other users have kindly sent you and compare them to the surfaces you have obtained from caia, you will notice that the more the surfaces have isoparametrics without discontinuity and regular and more differ from the relief, while the more the surfaces are small and definitely brute (parlo proprio of the caia automatics) and the more faithful to the relief (these differences are well visible). what are you doing? depends precisely on factors such as the material and technique with which you realize the brace, whether rigid or soft, whether from an offset and then coated it with soft material, or if you want to simulate and compensate for the increase and decrease of some muscular tissues etc. see how to proceed: if you simply want to make the surface and its offset in an approximate way, or if you need to edit it... Let us know.

Hi.

 

[theluka90]

Good morning. I did not expect that "success" [emoji16]. Anyway, I noticed what you said. My purpose for now is to get a clean surface that from the relief size you get an 8 mm offset

 

[theluka90]

I'm sorry to bother you. Could you send me your mail in private that I would like to show you the file that got my girlfriend and ask you two things? Thank you.