Automatic Initial Sketch Orientation 2

[BrittToolEngineer]

Greetings:

When entering a sketch, either new by clicking on a plane you wish to sketch on, or by clicking an existing sketch to edit, almost always, the sketch flips 180° (re-orientates). Is there a way to change how the sketch positions when entering into it?

Thanks,

Brent

 

[Toost]

the mechanism when creating a sketch works like this :
When you select a face to for the sketch, the normal of that face will become the + Zc of the sketch.( the face normals of a healthy solid is always out from the volume, if invards, the solid is corrupted.)
you will, when or if, the sketch re-orients look down the Zc . ( Zc+ towards you.)
on that solid, the linear edge which is most horizontal and lowest on your screen will be the +Xc of the sketch coordinate system. You can try this by rotating a simple solid slightly to see which edge will be the Reference direction ( + Xc)

When you select a datumplane , that datumplane has a positive normal side and a negative normal side, that vector will show as soon as you have selected it. The positive normal will become the sketch +Zc unless you flip the vector by either double click the arrowhead , or in the menu "reverse".
Also the reference direction can be flipped.

When the placement plane and reference direction ( and if you like the sketch origin) have been defined, NX will rotate the view such that +Xc is to the right and +Zc is towards the user. ( +Yc is then vertical up.)

If you experience that the sketch flips 180 when edited, it is because it is defined 180 flipped.

Regards,
Tomas

 

[BrittToolEngineer]

Tomas,

Thanks a bunch for this explanation. It is all clear now.

Thanks again,

Brent

 

[Ehaviv]

Hi Tomas

( the face normals of a healthy solid is always out from the volume, if invards, the solid is corrupted.)

In this case.

How to repair the solid, if possible?

Thank you.

 

[Lars1978]

Other question a bit out of toppic.
The revese button in various menu's (sketch, constrains, etc). Can I use a shortkey for this button?
(I liked it in Solid Edge a lot)



Lars
NX12.0.2.9 native
Solid Edge ST10
Inventor

 

[Toost]

The question on how to repair an inverted solid,
I have never seen one which was created by NX itself but i have seen a few which was imported from other systems.
thereby the feature history doesn't exist and one can be more brutal in the repair.
(use Split body, extract faces , reverse normal, remove parameters, delete the original body etc.)
I have repaired a few by extracting the faces and re-sewn these into a solid body.
I have used Export - Heal geometry but it seems never on these solids have "realized" that the solid is inverted.

I have not seen an option for a hotkey on the reverse normal, that would have been nice to have.

Regards,
Tomas

 

[Ehaviv]

Hi Tomas and thank you.

Yes I tried heal and sew.
But extract faces is new for me.