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Wrong direction of surface continuity

Pioneer
Pioneer

Hi,

 

My problem is this. I want to create a surface continuous with two other surfaces (in this case G1, but this happens often also for G2) but the direction is wrong. A picture tells a 1000 words, so please check it out. Smiley Happy

Thanks in advance for your assistance.

12 REPLIES

Re: Wrong direction of surface continuity

Siemens Phenom Siemens Phenom
Siemens Phenom
What type of surface are you using?

Can you supply the part file? Or at least the area you are surfacing?

Re: Wrong direction of surface continuity

Pioneer
Pioneer
Hi, unfortunately I cannot. But it happens with any surface type where you can choose continuity.

Re: Wrong direction of surface continuity

Siemens Creator Siemens Creator
Siemens Creator

Are the surfaces you are connecting to TRIMMED surfaces , look at the UV direction using Xform to see if that is causing the issue

Barry

You can control how the callout values in the NX Parts List are synchronized with the Teamcenter database.


Synchronize Callouts

By default, the NX callout values are synchronized with the Structure Manager Find No. (previously called sequence numbers). You can change this by specifying a value for the Callout Management customer default (see Teamcenter Integration Customer Defaults for additional information). The value that you specify is the title of an NX attribute.

This attribute title must be one that is synchronized with Teamcenter (i.e., with a note type defined in the Teamcenter database whose type matches the title). If there is no note type defined that matches the title, then an error message displays the first time Teamcenter Integration needs to use the value of this default.

The attribute specified by your default never actually exists in the NX data structure. When you create an attribute with that title, the setting of the attribute is intercepted. Instead of the usual action, the attribute CALLOUT is created or edited, and you enter its value. The corresponding note type in the Teamcenter structure is synchronized with the attribute titled CALLOUT. This is because NX requires the attribute CALLOUT to be present for use with callouts on drawings.

If you have specified an attribute other than DB_SEQUENCE_NO to be the callout attribute, then the Find No. in Structure Manager and the attribute DB_SEQUENCE_NO on NX components is synchronized. This means that when you load an assembly and the structure is updated from Teamcenter, attributes with this title appear on components and can be used in the parts list.


Note

The DB_SEQUENCE_NO attribute is entered in the Callout: Attribute Title field on the Teamcenter Integration for NX→User Attributes, All tab in the Customer Defaults dialog.


The figure below shows the mapping, by illustrating two drawings of the same assembly together with the corresponding BOM in Teamcenter. In Case 1, the callouts have been synchronized with the Find Nos. in Structure Manager. In Case 2, the callouts have been synchronized with the note DRAW_No in Structure Manager.

Be aware that in each case the attribute title CALLOUT corresponds to the required value in Structure Manager: in the first case with the Find No. field, and in the second case with the DRAW_NO note type.

Case 1:





NX

Teamcenter Structure Manager



CALLOUT

Structure Manager Find No.


Callout Management

DB_SEQUENCE_NO


Case 2:





NX

Teamcenter Structure Manager



CALLOUT

DRAW_NO


Callout Management

DRAW_NO


DB_SEQUENCE_NO

Structure Manager Find No.


Also be aware that in each case the attribute not used for the callout is held separately and its value corresponds to the appropriate Structure Manager value (DRAW_NO in the second case with note type DRAW_NO, and DB_SEQUENCE_NO in the first case with the Find No.).

Re: Wrong direction of surface continuity

Siemens Phenom Siemens Phenom
Siemens Phenom

Unfortunately there is no control on the surface creation tool to fix this.

I know of one workaround: If you change the surface normal on one of the bodies then that solves the problem. There is a reverse normal feature that does this. After this both tangent directions will be aligned.

 

Regards, **bleep**

Re: Wrong direction of surface continuity

Phenom
Phenom
Part of the issue appears to be you're only using 2 inputs where 2 guides and 2 sections (or a mesh type surface) would assist with the alignment issue you're having. This isn't anything new - it's hard to create a quality surface given the 2 edges you're using without having additional supporting geometry to guide the surface into the expected position.
-Tim

Re: Wrong direction of surface continuity

Siemens Phenom Siemens Phenom
Siemens Phenom

Here is a movie showing what I meant.

Regards, **bleep**

 

(view in My Videos)

Re: Wrong direction of surface continuity

Pioneer
Pioneer

Exaxtly what I was looking for!

Thought about the UV direction, not about the other tool. Strange that they are different things...

Thanks!

Re: Wrong direction of surface continuity

Pioneer
Pioneer

Changed the UV with the UV Direction Tool, but it didn't help.

Re: Wrong direction of surface continuity

Siemens Phenom Siemens Phenom
Siemens Phenom

Face normal is like the material side, in or out.

The U and V parameter directions are defining the surface itself.

The two are not related. If they were then sewing sheets (which required normals to match) would have to change U and V directions (definition) of the surfaces.

 

Regards, **bleep**