Dimension range in Sketch

[Questionmark10]

Hi,

I was wondering if it is possible to add a dimension constraint to a sketch that allows for a range of values. I.E. i would like the minimum distance between two points to be no smaller than 25mm. Is there a possibility to do this with NX9?
It is needed in the early stages of development when my sketch is not fully constraint yet so that i can adjust one part of the sketch and the system automatically adjusts the rest according to the other constraints.

Regards,

Questionmark

 

[JohnRBaker]

The best that you can do, once a sketch dimension has been created, is to go into the expression editor, select the expression associated with the constraint dimension, press MB3 and select the 'Add a Check' option where you can link it to a 'Requirement' which can generate warnings if certain user-defined criteria are met or exceeded, such as being outside a set range of values.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

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

 

[Questionmark10]

Hi John,

thank you for the prompt reply, however sad to hear that that is the only possibility.

Regards

 

[JohnRBaker]

If you're trying to create a situation where some other user, perhaps someone not familiar with how the model was created or how they are to edit it, is being asked to make a change to a particular parameter but you'd like to limit them to a certain range of values, there is an alternative approach that might work.

Attached is a very simple part in which all of the parameters are being controlled by Part Attributes, each of which have imposed limits or choices. For example, the 'Length' of the block can be anything between 50mm and 100mm, while the Width is limited to anything between 25mm and 75mm. The 'Thickness' of the part can be anything greater than 10mm while the 'Hle_Size' is limited to a list of five predefined values: 10mm, 15mm, 20mm, 25mm or 30mm.

To edit the model all you have to know is how to go to...

File -> Properties -> Attributes

...and in the category 'General' you'll find the above referenced Attributes which controls the parameters of the model.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

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

 

[jerry1423]

so what else are you looking for besides what was brought up to you?

 

[Questionmark10]

Hi,

thank you for the input John, sadly this is not exactly what i am seeking.
I will try to explain a little better what im after. I have a sketch where i have to arrange a number of different objects to fit into a certain space. Some of them are on fixed possitions but for the most part I am free to place them whereever. Hoverer the individual objects should not overlap each other. If we for example look at 2 circles i would like to give the centers of the circle the "minimum offset" of twice their radius so they do not overlap. They may however be placed further appart. It would help if i could do this in a sketch so that i can vary other parameters and have the rest of the objects arrange automatically within their given constraints.
I realise this means the sketch is not fully constraint, but since it is very early stages of development, this is irrelevant to my situation.

Regards.