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CAD tip CAD tip # 12638:

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Q - question

How to use conditional parameter values in Fusion 360?

A - answer Autodesk Fusion 360 in its parametric modeler does not allow (unlike Inventor) to work directly with IF-type conditions - i.e. set values of the dimensional or count parameters dependent on a specific condition is met for a given parameter.

But you can still perform a number of modeling operations based on a condition using workarounds - employing a respective math function. E.g. the functions max or min can compare values of two parameters or a value of a parameter against a constant number. The function sign will detect if the result of an operation - e.g. again a comparison by subtracting two values - is positive (1) or negative (0). With a proper combination of these functions you can build the required conditional expression. Do not forget to ensure consistency of units in your expression.

E.g. the parameter "number of holes" (Holes) in this example is preset as conditional, depending on the current value of the dimensional parameter "BB":

max(min(round(BB / 10 mm); 5); 3) + sign(BB / 1 mm - 50)

This expression means, that if the dimensional value of BB is lower than 35, the number of holes will be 3, from the length of 35 up to 45 mm the number of holes will increase to 4, if the length exceeds 45 mm, there will be 5 holes and for all lengths above 50 mm, the number of holes will be 6.

Another option is using the programming interface, the Fusion 360 API.

Fusion360
100% *  CAD 
11.6.2020    1485×  
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applies to: Fusion360 ·

See also:
Tip 12749:Generate parametric mathematical 3D surfaces (meshes) in Fusion 360.
Tip 12671:Import Excel table by snapping a photo of it.
Tip 12609:Dynamo - how to convert a raster photo to 3D model in Revit?
Tip 12600:Parametric 3D curves in Fusion 360.
Tip 12184:Overview of CAD formats supported in Inventor 2020 (import/export/AnyCAD).


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