topic Driving an extrusion with a radius? in Fusion Design, Validate & Document Forum

Driving an extrusion with a radius?

bearman305 — Wed, 11 Feb 2026 16:25:16 GMT

I am trying to create a parameter to drive an extrusion with a radius. However, I have had no luck in creating it. I want to use a radius to drive the extrusion length. My example would be the following. I have a 5" radius, I want the extrusion to be 2x the radius; so in this case 10" overall length. If the radius was changed to 2.5". the overall extrusion would adjust to be 5" in length. When I have attempted to create the parameter, it will not allow me to chose the radius. I have named radius in the parameter (if I adjust the dimension, it will adjust the radius accordingly). However, when I hit E (for extrude) and begin to type in =radius*2, it does nothing nor can I hit "ok". Could someone explain to me if the software does not allow for this type parameter or what I might be doing wrong? Thank you for your help, Bear

Re: Driving an extrusion with a radius?

TrippyLighting — Wed, 11 Feb 2026 16:29:55 GMT

Please share what you have modeled so far.

Export the design as a .f3d and attach it to a post.

Re: Driving an extrusion with a radius?

kacper.suchomski — Wed, 11 Feb 2026 16:31:49 GMT

Please delete "=".

Betreff: Driving an extrusion with a radius?

g-andresen — Wed, 11 Feb 2026 16:41:58 GMT

Hi,

follow this screencast

(view in My Videos)

To do this, you must have Parametrics enabled, i.e., a timeline exists

günther

Betreff: Driving an extrusion with a radius?

bearman305 — Wed, 11 Feb 2026 16:59:24 GMT

Thank you for illustrating how I could make this work, I appreciate your help. Good day,