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# NX System Defined Maximum 3D Model Space

## NX System Defined Maximum 3D Model Space

(OP)
Hello everyone!
This is my first post.

My question is very simple:

Where can I modify the maximum bounding limits for the NX?
For example, if I try to make a equilateral triangle with a 300000mm lateral and use those vertex points to create a 3 points general conic, I have the following error "Invalid conic".
Another example is trying to make a face extrusion or any other feature to a simple cube of 300000mm lateral dimension.
Please, who can help me to solve this problem?
Thank you all and my regards!

### RE: NX System Defined Maximum 3D Model Space

OK, the 'size' of the model space of NX is FIXED and can NOT be altered by the user.  The simplest description is that it's a...

Cube with its centroid located at 0,0,0 (absolute X,Y,Z), with each of its 3 sides measuring 1,000 units in length.

All NX part files, irrespective of the units-of-measure which you are working in, be it Inches for an Imperial Part file or Millimeters for a Metric Part file, the working 'model space' is defined using the METER as the base 'unit'.  Therefore ALL POINTS on a model must lie somewhere between -500M X,Y,Z and +500M X,Y,Z in order for the system to assure that the results of any creation operation will be a valid model or that assumptions depending on planarity, alignment, coincidences, etc. are properly met.

I hope that this clarifies the issue and provides you with enough information so that you can construct your models in a manner where the spatial limitations of the NX working model will not become an issue.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Cypress, CA
http://www.siemens.com/plm
http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

### RE: NX System Defined Maximum 3D Model Space

(OP)

However, regarding the maximum of 1000meters X,Y,Z, in my example, I can't do anything bigger than something lying in the +300meters X,Y,Z and -300meters X,Y,Z...  :(

So, regarding the limitation of 1000meters, how can I make a structural analysis of big structures like a 2000meters bridge?

Waiting for another helpful feedback, thank you all!

### RE: NX System Defined Maximum 3D Model Space

(OP)
I heard from another NX expert that the maximum working plane is 36Km!

But, how can it be if I can't make anything away from a +300meters X,Y,Z and -300meters X,Y,Z ?

If someone tries to make an extrusion from a face of a cube with 600meters of width, it not possible!

Cheers...

(OP)

### RE: NX System Defined Maximum 3D Model Space

We've explained what the limitations are.  Nothing has changed since then and there is no expectation that anything will be changing in the near future.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Cypress, CA
http://www.siemens.com/plm
http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

### RE: NX System Defined Maximum 3D Model Space

What John has said is correct, this is not a user editable function - The working area that NX lives inside is generous enough for the majority of users.

All I can suggest is that you model to quarter scale so that your model does not hit the outside of the working envelope.

Maybe NX isn't the place to be modelling a bridge to double precision? To the best of my knowledge NX rarely gets used for architectural design as it is far too precise – Aeroplanes, Oil Tankers – yes, Skyscrapers, Bridges – No..

### RE: NX System Defined Maximum 3D Model Space

Well, maybe not 'Oil Tankers', but certainly Submarines and Aircraft Carriers.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Cypress, CA
http://www.siemens.com/plm
http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

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