Extrude attached or unattached option

[CAD_user]

In Extrude command, There is this option, attached or unattached, I didn't found any utility for this. What's it intend?

[dschenken]

In sheet metal?

http://support.ptc.com/help/creo/creo_pma/usascii/#page/sheetmetal%2Fsheetmetaldesign%2FYour_Design%2FAbout_Creating_Walls.html

A wall is any section of sheet metal material in your design. You can create two kinds of wall:

• Unattached wall—An independent wall that does not need another wall to exist.

• Attached wall—Dependent on, at least one other wall.

You can create these types of unattached wall:

• Planar

• Extrude

• Revolve

• Boundary Blend

• Swept Blend

• Sweep

• Helical Sweep

• Blend

You can create these types of attached wall:

• Flat

• Flange

• Twist

[Mahesh_Sharma]

Those are state of geometry preview within the feature creation user-interface.

Attached—Displays the geometry as it appears when you finalize the feature. 
Unattached—Displays the outline of the geometry you are defining. 
Config option 'dynamic_preview' controls the default preview state.

For better display, Create a solid box and on that create a hole. When creating hole use Attached or Unattached. 

[CAD_user]

So, it works only for the preview option

[Mahesh_Sharma]

yes.

[dschenken]

http://support.ptc.com/help/creo/creo_pma/usascii/#page/fundamentals%2Ffundamentals%2Ffund_three_sub%2Fabout_feature_creation_preview.html%23