Use variable formulas to add more intelligence to your custom components. Variable formulas always begin with the equal sign ( = ). At its simplest, a formula can be a simple dependency between two variables, stating that P2 equals half of P1 ( P2=P1/2 ), for example. To create more complex calculations, you can use functions and operators inside the formula. For example, you can add mathematical expressions, if statements, references to object properties, and so on. When you create formulas, note that multiplication is faster than division, for example, P1*0.5 is faster than P1/2.
The following example shows how to create a formula that sets the weld size to half the thickness of the secondary part flange. When the component is used in a model, Tekla Structures will use the thickness of the secondary part flange to calculate the size of the weld.
The Variables dialog box opens.
In this example, enter w as the name of the variable.
Tekla Structures pastes the reference to flange thickness from the clipboard.
The formula should now read:
=fP(Flange thickness 1,"GUID")*0.5