Dear John Jin ,

To overcome this error, you must align the two objects in (X, Y) axes as shown in Figure 1. Figure 1 also shows the difference between the selected two points in (X, Y) axes are zeros. After that, you can select the two objects faces and make a loft bending for them as shown in Figure 2.

Regards.

I have a suggestion:

First use loft for interior design, then use loft for exterior cylinder.

After lofting both structures, Subtract the inner from the outer.

Increase the length, width, height of the vacuum box

Hi all,

I really appreciate all your explanations and your helps and sorry I responded late.

Dr. Ahmed Sayed, I thank you for simulating and uploading your images. However, I am faced with that error again by using the same coordinate for (X, Y) as you can see the uploaded image.

Dr. AmirAshkan Darvish, Thank you for your suggestion but it doesn’t work and I get the same error. I also should apologize that I haven’t had enough time to check your comment in meta-material post but I really grateful for your help and I will check your comment ASAP.

Eng. Mohan Narasimman, Thank you for your comment but it doesn’t work ( I changed the length of my shapes)

John Jin Lofting two faces of two rods is a typical example in CST. My question is: Are you able to loft two circular faces of two perpendicular rods (as shown in the figure)? If you can, then lofting your structure would not be a problem. Just do the following:

Please look at the attached picture. You should do it for interior and exterior cylinders, separately, and then, subtract them. It won't show the error if you do it as I said.

Hi,

I am appreciative of your swift response.

As you can see my lofting has been failed for many times. Would it be possible my CST software doesn't work? or Should I install newer version?

Thanks

I think it has nothing to do with your CST version as I could see

1-you selected a face containing two circles and that's why you get the error saying that the face has more than one loop.

2- you are better to create a horizontal and vertical distance between the prependicular faces in order to prevent it from making single section lofts without sufficient curves.

Try these two points and let me know the result.

Thank you Dr. darvish for your comment,

1)You are right and by removing the internal circle it works fine.

2)Yes:)

Thank you again for your recommendation.

Dr Amirashkan Darvish Is there any way we can loft two hollow cylindrical rods?