Why do converted .stp files often have split lines in them?

[Mike Gera]

If I convert a .STP file to a .SLDPRT file, oftentimes, cylindrical features will have a split line.

I've attached an example.

Click on the dome. It will become apparent.

How are these split lines eliminated?

Thanks for any help.

ETA: I'm not sure if "split line" is the proper terminology.

[josh]

I believe it depends on how the STP file was exported. SolidWorks has export options for STP files to do this. The terminology is "Split periodic faces". A full understanding (beyond what the help file here states) prolly requires a lotta math.
https://help.solidworks.com/2016/englis ... S_STEP.htm

[zxys001]

A little trick if the surfaces were analytical... save as IGES, and open (or import), if you have stitching on, it will resolve/heal without the split.
(just tested, it heals most but not all, like the fillets)

[dave.laban]

Can't open the attached SW file in the first post (future version), but I normally get rid of the split lines by using the Delete Face tool and let the software patch it up to one surface.

[Mike Gera]

Can't open the attached SW file in the first post (future version), but I normally get rid of the split lines by using the Delete Face tool and let the software patch it up to one surface.

The Delete Face tool worked beautifully.

Thanks!