Problem subtracting

Ive created this using sweep so it is now a sweep surface. i want to subtract a part of it but it dosent work. is there any other way to do it

That swept object appears hollow (i.e., a collection of swept surfaces) so will not be suitable for the Solid Subtract command.

Perhaps only sweep the top surface, then use -

Command: Thicken

That may produce a solid which can be used with Union, Subtract, etc.

i tried using thicken but it still looks the same.

Actually, a more direct approach would be to explode that object, isolate either top or bottom, and then thicken.

If that doesn’t work, is it possible to post the .DWG shown above?

i couldnt upload the sweept file due to file size but i uploaded the lines or form which i want to create a solid out of. ive been having major problem turning it into that exact shape

p3d.dwg

I modified a couple of things in that file:

First I brought the geometry closer to the World Origin.

I also rebuilt the “Guide” curves to have to have the same number of control points. Not a absolute requirement, necessarily, but generally helpful.

ThickenedGeom.dwg

yes its indeed helpful. may i know what command did u use to get the result. when u meant world origin..?

The World Coordinate System (WCS) is the coordinate system active when a drawing is first initialized. It is the system upon which all other are based. See attached.

AutoCAD solids use a different level of precision than other forms of geometry. Because of this the software encounters “rounding” issues sooner than would normally arise.

The further away the construction geometry is from WCS 0,0,0 – the more likely it is to have problems with the 3d Solids related commands.

I’m not sure if that was an issue in this case, but it is helpful to keep that in mind.