How do I prevent overlaying surfaces within a power-railsweep-operation?

[loxogon]

Hello community, hello NPower-Team,

I have found some problematic surfaces in my nurbs-models. The trouble often occurs when I use a power railsweep with a single rail.

The surface at the round corners overlaps itself and flips direction at the same time.

I have put a snapshot and a max.-file into the attachement. The green surface represents the front surface and the red one is the back surface.

The round corner is a problematic area, as the profile overlaps itself when it sweeps around the corner.

I also have this problem with other types, which then occurs after joining them when I try to put all planes together within an editable nurbs.

How can I prevent this?

How can I solute this problem within the power-railsweep-object?

How can I solute this within an editable nurbs-model?

Kind regards
Arnim

[PiXeL_MoNKeY]

The problem comes from the quality of your rail shape (too many construction points and bad shape). Rebuild it from a sketch consisting of 3 lines with corner filleting. Replace the Rail and you will have what you want. Which means you need to look at the quality of all the other curves you have made for the other objects.

BTW, there is only the green object in the file you posted.

-Eric

[loxogon]

Hello Eric,

thanks for your quick reply.

I'll try that out. That sounds promising.

Of cause, I am learning to work correct and cleanly, but what also interests me, is what can I do, when something like this occurs on an editable nurbs object (for example a working partner gives me an object like this).

Can I manually shift vertices or swap edge segments on an editable nurbs object? Or can I weld vertices selectively without the sewing-function or the join-surface-function?

Kind regards
Arnim