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- equal area constraint in sketch?

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01-09-2018 09:47 AM - edited 01-09-2018 02:27 PM

In NX sketcher, various constraints provide a very flexible tool to control the size dependence of geometries.

I know that a triangle can be used to constrain the length of two lines to a fixed ratio.

Since long I'm thinking about whethe it's possible to **constrain the area of two sketch geometries to be equal**, using ONLY geometric constraints but NOT expressions. E.g. the square and the rectangle in the figure below. If this is possible, the lengths (a, b, c) of three lines can be constrained to: **a×a=b×c**

Hope to have some clues from you. Thanks!

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01-10-2018 11:21 AM

This is not possible, but a good ER candidate.

Regards, **bleep**

Regards, **bleep**

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01-10-2018 11:32 AM

Hi @DickBaardse Thanks! If it's impossible, let me forget it and settle on the use of expressions.

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01-11-2018 12:56 AM

NX can use a spreadsheed to calculate data. There is a function in Excel called "Goal Seek".

( see https://docs.plm.automation.siemens.com/tdoc/nx/10/nx_help/#uid:tools_tls_spd_mod_gs_ov_r)

The spreadsheet can do the work for you to find a parameter combination for area2 to make it the same size as area1.

Excel changes a parameter, checks if it is now closer to a required solution, and changes the parameter again.

Wolfgang

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01-11-2018 01:15 AM

I would need to learn how to manage data with spreadsheet in NX first. Thanks for the information!

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