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CAD tip CAD tip # 8971:

   
Question CAD 
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Q - question

Linking together values of two dimensions in AutoCAD.

A - answer You have two dimensions and you need to automatically change the second dimension when the first dimension is updated - to the same or to a derived value.

You can use dynamic text fields for such link. Create the first dimension in a usual way, by dimensioning an object. Create the second dimension, double-click on its text to edit it (use DDEDIT in older AutoCAD versions). Delete the original text (the dimension value) and choose Insert > Field from the context ribbon (or press Ctrl+F). In the Field dialog, choose the category Objects, the field Object. Select the the object of the first dimension and from the Properties list choose the property "Measurement". Adjust the Format and Additional format as neccessary and finish editing of the second dimension.

Both dimensions stay dynamically linked - the second one depends on changes of the first one (after regeneration or save).

Text fields can contain also arithmetic expressions (see the tip 9717), so you can also modify the text of the second dimension by a calculation.

ACADLT
100% *  CAD 
15.12.2012    9653×  
Prices - CAD eShop:
applies to: AutoCAD · AutoCAD LT ·

See also:
Tip 13442:How to easily count the number of certain objects in a DWG drawing in AutoCAD LT?
Tip 13426:Use of alternative units for arithmetic in dimensions (without square brackets).
Tip 13292:Automatic label - number of blocks in the specified area of a DWG.
Tip 13006:Calculated property descriptions (tobogan slide from floor to floor)
Tip 13000:Labels of dimensional parameter values in dynamic blocks (parameters->attributes)


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