Deleting Principle Axis (Not Datum) in Journal

[alj722]

I am working on a script to automate the clean-up of large STEP imports into NX11. One thing I would like to clean up is a principle axis that is added to every part (not a datum CSYS which I want to keep). I would like to rid my imported model of these. There may be a way to turn it off during the import, but I have so much work into the model at this point, I would rather just script it. As part of the clean up journal I would like to select and delete them in each part/assembly but I can't figure out how to select these in the Journal file because they are not a feature or a body or a datum or anything else I can identify. I was looking for a way to simply dump out everything in the model and see if I can figure out how it is identified, but it doesn't seem to fit into any of the classes I am familiar with. Anyone dealt with selecting these in a journal file? I've attached a small assembly that has a few of them in case you'd like to give it a look.

Thanks in advance,

Drew

 

[cowski]

That is a coordinate system. You can create one in NX by going to menu -> format -> WCS -> save; a coordinate system object will be created at the location of the WCS.

An NX part has a .CoordinateSystems collection that you can iterate through to find these objects. Be aware that datum csys features also create a coordinate system object as part of the feature. You will need a way to differentiate the coordinate systems used by a datum csys feature and those used individually. The .AskObjectFeat method is one way to determine if the coordinate system object is used by a feature or not.

www.nxjournaling.com

 

[alj722]

That did it! Thank you. I was using .CoordinateSystem (Singular). I put together a rather clunky journal file to simply count coordinate systems (to make sure I was getting it to work) and it appears that it also counts the WCS as a coordinate system. With a CSYS and two additional coordinate systems, it counts 4 of them.

I really appreciate the help!

Drew

[pre]
Option Strict Off
Imports System
Imports NXOpen
Imports NXOpenUI
Imports NXOpen.UF


Module NXJournal

Sub Main()
Dim theSession As Session = Session.GetSession()
Dim ufs As UFSession = UFSession.GetUFSession()
Dim workPart As Part = theSession.Parts.Work
Dim lw As ListingWindow = theSession.ListingWindow
Dim intCartCount as integer = 0

lw.Open()

For Each aCart As CartesianCoordinateSystem In workPart.CoordinateSystems
lw.WriteLine(aCart.ToString())
intCartCount += 1

Next
lw.WriteLine("Number of Coordinate Systems = " & intCartCount.ToString())

End Sub

End Module
[/pre]

 

[cowski]

You can ask the type and subtype of the object. You are looking for UF_coordinate_system_type (45), with a subtype of UF_csys_normal_subtype (0). If you find an object with subtype = 1, that is the WCS.

The type definitions below are taken from the uf_object_types.h file (found in the UGOPEN directory).

#define UF_coordinate_system_type                45
#define    UF_csys_normal_subtype                      0
#define    UF_csys_wcs_subtype                         1
#define    UF_csys_cylindrical_subtype                 2
#define    UF_csys_spherical_subtype                   3

www.nxjournaling.com