An Equation

[emvella]

Hi,

I think this is impossible but I will take a chance because if it is possible it will save us lot of work and time.

At work I have a CAD software and I use equations to set X, Y, Z positions and material width, length and height. Equations are similar to Excel formulas. So if it works in Excel it will work in the CAD software.

I want a special equation that it ends always with same answer even if I change a particular number from the 4 or more numbers that I have in that equation. (when I say numbers they are positions and sizes of materials).

Example I have:

100+200+120+80=500

And I change 80 to 120, I still want the answer = 500 (means that a particular part stay same position and don't move even if I changed a size of another part).

Thanks

 

[oldbrewer]

yes becuse the NEW 80 drives the adjustment to the 100 and 200

[TABLE="width: 512"]
<colgroup><col width="64" span="8" style="width:48pt"> </colgroup><tbody>[TR]
[TD="width: 64, align: right"]100[/TD]
[TD="width: 64, align: right"]200[/TD]
[TD="width: 64, align: right"]120[/TD]
[TD="width: 64, align: right"]80[/TD]
[TD="width: 64"][/TD]
[TD="width: 64"][/TD]
[TD="width: 64"][/TD]
[TD="width: 64"][/TD]
[/TR]
[TR]
[TD="align: right"]92.5[/TD]
[TD="align: right"]192.5[/TD]
[TD="align: right"]120[/TD]
[TD="align: right"]95[/TD]
[TD][/TD]
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[/TR]
[TR]
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[/TR]
[TR]
[TD="align: right"]100[/TD]
[TD="align: right"]200[/TD]
[TD="align: right"]120[/TD]
[TD="align: right"]80[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]107.5[/TD]
[TD="align: right"]207.5[/TD]
[TD="align: right"]120[/TD]
[TD="align: right"]65[/TD]
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[/TR]
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[TD="colspan: 2"]formula in A2[/TD]
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[/TR]
[TR]
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[TD="colspan: 2"]=A1+(D1-D2)/2[/TD]
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[TD="colspan: 5"]so half of D1 minus D2 is added to A1 and B1[/TD]
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</tbody>[/TABLE]