Setting model expression formulas

[brad.bylls]

I am trying to set a model parameter expression in a script.

# Create the body clearance

    cutBodySketch = sketches.add(xyPlane)

    cutBodyCircle = cutBodySketch.sketchCurves.sketchCircles.addByCenterRadius(center, numBoltClearDiam/2)

    cutBodySketch.sketchDimensions.addDiameterDimension(cutBodyCircle, adsk.core.Point3D.create(0, 1, 0))

    cutBodySketch.name = 'Body Clearance Sketch'

    cutBodyProf = cutBodySketch.profiles[0]

    cutBodyExtInput = extrudes.createInput(cutBodyProf, adsk.fusion.FeatureOperations.NewBodyFeatureOperation)

    distance = adsk.core.ValueInput.createByReal((numBoltBodyLength-(numBoltBodyDiam * numThreadEngage)) * -1)

    cutBodyExtInput.setDistanceExtent(False, distance)

    cutBodyExt = extrudes.add(cutBodyExtInput)

    cutBodyExt.name = 'Body Clearance Extrude'

    cutBodyExt.expressions = 'd2 - ((d1 * 1.5) * -1 )'

The last line does not produce an error.

Is it possible to do this?

[goyals]

From the code you shared it looks like you are setting expressions property on extrude feature but no such property exists there so it should throw exception. Expression set property is available on parameter class http://help.autodesk.com/view/fusion360/ENU/?guid=GUID-0e50e797-b406-4c51-9bdb-d9aa62af920b

[brad.bylls]

Thanks for the input.

However, that is for user parameters.

I want to put a formula in a model parameter.

Brad

[brad.bylls]

I can't see the replies so I don't know if it solved.

[goyals · Accepted solution]

I just found an old post showing how you can reference model parameters in an expression to create a feature.

https://forums.autodesk.com/t5/fusion-360-api-and-scripts/reference-to-modelparameter-object-in-an-e...

This is example in API documentation showing how to use expression property of model parameters

http://help.autodesk.com/view/fusion360/ENU/?guid=GUID-CB1A2357-C8CD-474D-921E-992CA3621D04

I hope it helps. Thanks.

[brad.bylls]

It was complicated but I figured it out from the second link.

Thank you so much.