Parametric Array - How to

[cve60069]

hello

I wish to control an array within a block (see jpg).  Basically, I have a series of circles which I want to fix to Distance1.  I want to control the distance between the circles with an expression called 'centres' (say 80mm). When I change the length of Distance1 in the Properties-tablet to say 600-mm, I want the array to follow the dimension.  When I select the array, the fx button next to the column distance on the array-tablet is greyed out.  If I were using Revit, I would apply a dimension and give it a label which I would manipulate in the identity-table.  What should I do in AutoCAD to achieve the same result please?

Regards

[Charles_Shade]

You should always post the actual Block so that others can see what you have instead of a picture.

A picture may be worth a thousand words but the actual Block is the novel.

Your queries may be better directed in the Dynamic Block Forum where many who do such things frequent.

The Forum is linked in my signature.