How to sweep under 90 deg angle?

[Zox]

I have a shape like this:

 

And I'm trying to sweep it around shape like this

 

But it won't, it says "The selected path curve is not valid." - so what do I do? (it is polyline) Is there maybe some other way to get this 3D shape fast?

[ReMark]

Try moving your profile to the midpoint of the long line to the left.

 

If that still doesn't work then work with just half of the path and mirror the result. Use Union to join the two halves. Done.

[Zox]

wow it worked with half! Thanks!

just one quick question: when I have 2 tunnels like this

is there a command to quickly join them?

[ReMark]

First of all it looks like you swept lines and an arc with the end result being a surface. Is that what you wanted or did you want a solid instead?

 

Not sure how you ended up with the situation. There are a couple of commands that might be used to fix it but I'd redo it to avoid the problem altogether.

[ReMark]

This is what I had in mind.

[ReMark]

Close up of section. It's a 3D solid. See the difference?

 

Are you creating moulding for a cabinet?

[JD Mather]

It is almost always better to have the sweep path at the inner most point on the profile (you have on outermost point).

Second best it to have at the centroid of the profile.

Third best at the midpoint of bottom or top of profile.

 

These are general rules of thumb, best location depends on both the path shape and the profile shape.

Imagine walking around the path with the profile. You want to avoid self-intersecting collisions (at changes of direction like corners and "too small" arcs.

[Zox]

First of all it looks like you swept lines and an arc with the end result being a surface. Is that what you wanted or did you want a solid instead?

 

Not sure how you ended up with the situation. There are a couple of commands that might be used to fix it but I'd redo it to avoid the problem altogether.

 

Actually those are different things. I got it alright, I just asked... but I now see it's useless because there are ways not to get in situation like that. I'm actually just drawing some old door and I have problems with 3D trimming. For instance that shape also gets shorter and I just tried to copy and then shorten it but I can't get 3D trim to work.

[ReMark]

You can't use the normal TRIM command with a 3D solid. Try MOVE FACES. If you can't figure that one out then you could always cut the piece shorter using an extruded line (gives you a surface) then use the SLICE command with the SURFACE option.

 

Yes, a surface and a solid are different things. For what you are doing I'd create a solid.