Spring Blows Up Section View 1

[mycon73]

Hi UG World....

I have a spring, which is (suppose) to be a solid body. When I create a section view, the view will not update. I believe it's because UG is seeking the spring surfaces as multiple faces & is getting "confused" on how to update it.

The spring model that I'm using is a "Released" component & I don't have access to change the model. Is there a way to link the solid body, but have it be one continual face, rather than multiple faces or surfaces?

Thanks


Jason Misztal
Power Tool CAD Designer
Marquardt Switches Inc.

http://www.switches.com

Syracuse, NY

 

[mycon73]

Hi UG World....

It seems that no one has an answer for me on the above question that I posted. Perhaps, someone can answer this?

Is there a way to make a spring that does not have multiple surfaces or faces on it & allow UG to be "smart" enough to be able to update section views, with springs in it. As far as I can tell, there isn't... but, perhaps someone out here can find a (better) solution.

Thanks


Jason Misztal
Power Tool CAD Designer
Marquardt Switches Inc.

http://www.switches.com

Syracuse, NY

 

[jpetach]

Jason,

Some questions:

Is this a master model drawing or a drawing in the same part as the model?

What type of section view is it? (simple, stepped, revolved, breakout)

Is the spring a single body?

Can you open the released part, in the modeling application place a datum plane at the same location /orienation that the section cut line wants to disect the part and successfully create a trim feature? If the modeling trim fails it is likely that it is either due to non-manifold or attempting to create more than one body. Drafting can not fudge that. When/if a location for a successful trimming plane is determined construct/position the section cut line similarly.

If the question is can a cable/tube be converted from/to single or multiple segment - not in nx4, it is set at creation time.

I'm curious, what causes you to suspect that the multiple faces is the cause of the section failure?

 

[cowski]

The entire section view fails to update or just the area with the spring in it updates incorrectly?

What kind of spring is it (compression/extension end condition, etc)?

Is the current component a solid body? Are you sure you have the correct reference set in the assembly?

Perhaps more information will lead to an answer.

Is there a way to make a spring that does not have multiple surfaces or faces on it & allow UG to be "smart" enough to be able to update section views, with springs in it.

Yes.

 

[mycon73]

Hi,

I have a compression spring & created a simple section cut. Only when I make the spring visibile is when the section view will not update.


Perhaps, I can trim the spring in half & take a cross section, but I don't think I get the profile I truly want.

Thanks for the feedback.. .Any other suggestions?

Jason Misztal
Power Tool CAD Designer
Marquardt Switches Inc.

http://www.switches.com

Syracuse, NY

 

[cowski]

Use a helix for the main part of the spring, create end condition as needed, then use bridge curve between the helix and end condition curve. Use the tube command to make a solid spring and do a section view to see if it updates.

If it does update, then it was probably the way the original spring was built that is giving you the problems.

 

[mycon73]

Hi Cowski,


It appears that the in the original model, law curves were used to create the profile of the spring. Law curves seems to have more controlable attributes for the desired output than Helix curves do. However, Law curves creates splines, which I think is the reason the solid has a bunch of segmented or multiple faces.

In addition, for this particular part, it's almost like a part family. Multiple springs are made from the same model. A handful of expressions controls the desired output.

I do what you suggested, but that would be recreating the part - in this case, the compression spring, which I don't want to do because the spring is a "Released" component. Also, my part would not be associative to the original model or have limited associability.


Any other suggestions?


Jason Misztal
Power Tool CAD Designer
Marquardt Switches Inc.

http://www.switches.com

Syracuse, NY

 

[ewh]

cowski,
Excellent lesson on spring construction. Using bridge curve at the ends is where many stumble. Have a star!

 

[cowski]

ewh,
Thank you, I'm glad that you found it helpful.

mycon73,
The assembly is not referencing the 'faceted' reference set is it? I have had the faceted reference set loaded a few times (on accident) and it gave me problems when updating the drawing. If it is a problem with the original part, it would seem to be in your best interest to fix it (there must be some revision process in place for released parts). If the spring model is a solid (not multiple solids or sheet bodies lumped into a reference set) then without seeing the file it is difficult to analyze the problem.