Issue with padding a sketch

[AliHatukai]

Hi all

I have this small issue with me trying to pad a sketch in part design, But before that i want to ask sometihng..
What's the difference between "Pad" in part design workbench or "Extrude" in part workbench ?

And not to the issue itself. I have this simple sketch (That took me forever to do i must admit..) that when i try to extrude
it fails, and when i try to pad it for some strange reason it cuts part of the sketch off..


something it writes in the report view is

Part::Extrusion: Links go out of the allowed scope
Exception (Wed Apr 17 15:48:28 2019): Wire is not closed.

any help ?
thanks.

[HarryGeier]

Hello Ali

the difference is :

A PAD creates a parametric FEATURE ( OCC based ) in Part Design. I can be based on sketch or on a face.

An Extrusion creates an CSG Object based on any shape.

PAD should be used in Part Design based projects . Extrusions should be used in non Part Design based projects and can be used as base features for beeing further modelled in part Design .

Mixing both is possible but sometimes tricky and error prone. Thus ist should be used by experienced users.

Your sketch problem: The line at the right end ( short vertical ) exists 2 times.. Delete one of them , then it works

[AliHatukai]

Hello Ali

the difference is :

A PAD creates a parametric FEATURE ( OCC based ) in Part Design. I can be based on sketch or on a face.

An Extrusion creates an CSG Object based on any shape.

PAD should be used in Part Design based projects . Extrusions should be used in non Part Design based projects and can be used as base features for beeing further modelled in part Design .

Mixing both is possible but sometimes tricky and error prone. Thus ist should be used by experienced users.

Thanks for your help!

I fixed the issue by the way. Found the spot where the lines didnt connect and now it works fine.

Thanks!

[HarryGeier]

Fine, see my answer edited...

[AliHatukai]

Fine, see my answer edited...

I did exactly what you told me to do and it works. thanks!

[bejant]

What's the difference between "Pad" in part design workbench or "Extrude" in part workbench ?

Hi Ali, and welcome!

A few more differences for FreeCAD version 0.17 and newer:

• Pad must be inside a Body container.
  • Not so with Extrude.
• The result of Pad must be one solid.
  • The result of Extrude can be separate geometries.
• The result of Pad must be one solid.
  • The result of Extrude doesn't have to be solid.