I can’t extrude a closed polyline when it locates beyond a certain point in X axle.

[Anonymous]

I can’t extrude a closed polyline when it locates beyond a certain point in X axle. When this closed polyline moves to right side, " it cannot sweep or extrude a self-intersecting curve. 1 object removed from selection set." But it do can extrude on the left side of a certain point. See attached cad drawing. Command "Extrusion" has limits in WCS?

[ChicagoLooper]

You have a drawing with an orthographic projection. You can tell it's an ortho projection because when the view cube is in TOP view, you can see your object's top, front and side view.

You should not draw with an ortho projection. Instead, change your POV (point-of-view) to top, draw you object's 'top' view, then extrude along the z-axis for the object's height, When you change your POV to front or side, you can extrude along the x- and y-axes for width and depth. To view the extruded object from different angles, you can 'rotate' the view cube.

To rotate your view you can click directly on the view cube--click different surfaces (or corners) of the view cube to change your view. You can also use the dropdown menu in the ribbon to change the view.

[Valentin_CAD]

@Anonymous ,

In addition, as a reminder per AutoCAD Help:

• "Extrudes selected objects along the positive or negative Z axis. The direction is based on the UCS ...
• Also consider the UCS.

[Anonymous]

Thanks for your quick reply. Please see attached drawing. The left polyline can be extruded, but the right one can't. Right one is a copy from left one. My Autocad is 2020 version. 

[ChicagoLooper]

Orthographic drawings are not typically extruded because they display 2D geometry as though it were drawn in 3D. These type of drawings are typical in conceptual drawings, e.g residential drainage layouts to show where 'risers' are located in the plumbing network.  

If you extrude 2D line work to 3D solids then you can VIEW those solids from different viewing angles. For example, from the front, left or top. Using the view cube, you may also click a corner of the view cube to view the objects as isometric.

1_Front View2_Left View3_Southwest Isometric4_Top View

[Anonymous]

Thanks. This part is a corner part with 45 degree. It is not an Orthographic drawing. Polyline shape is created in the XY plane at top view as you mentioned. As this drawing was tested on several computers in office and the results were the same. 

[Anonymous]

If I change the polyline profile to region, Extruding works. Why polyline has problem?

[ChicagoLooper]

What happens when you rotate the object using the Object Viewer?

Click >>HERE<< for video.

[JBerns]

I think you are missing the point of the OP's ( @Anonymous ) message. I don't think it has anything to do with ortho projections.

The polyline will not extrude at that X,Y coordinate. 

I copied it to the left by 10 units and the extrusion works as expected.

I tested moving/extruding until it failed.

The polyline must be moved at least 6 units to the left from its original position before it will extrude.

Why? The shape has a bounding plane of 127436.0, -6.811, 0 by 127612.0, 218.511, 0.

Certainly that should be an acceptable working coordinate range.

I drew a rectangle farther to the right and it extruded.

Why this shape at that XY position cannot extrude is curious.

Perhaps someone can offer an explanation.

Regards,

Jerry